RAP

RIKEN Center for Advanced Photonics
2022 - 2023

RIKEN Center for Advanced Photonics
2-1, Hirosawa, Wako, Saitama, 351-0198, Japan
https://rap.riken.jp/en/
RIKEN 2022-008

Opening up new horizons with photonics
RIKEN Center for Advanced Photonics (RAP) is helping

ever seen before. Being able to see objects helps us toto realize the dream of making the invisible visible.

understand and manipulate them.

As one example, stroboscopes, which allow us to see

The work of the Center for Advanced Photonics

high-speed phenomena by pulsing light in a shortfocuses not simply on making discoveries that will be

duration, cannot catch the movements of molecules orrecognized by the research community, but rather on

atoms because they simply move too fast. However,contributing to society by developing practical

thanks to research in photonics, lasers developed toapplications of advanced photonics.

generate pulses at even shorter duration such as 10-15
second (1 femtosecond) or 10-18 second (1 attosecond)
now allow us to see the movements of electrons inatoms or molecules.
Electron microscopy makes it possible for us toobserve objects at extremely high resolution. However
it requires the specimen to be put in a vacuum, making
it impossible to see living cells. Using an optical
microscope opens up that possibility. It was generally

Just as our social infrastructure was transformed by
the steam engine in the 19th century and by electronics
in the 20th century, photonics technology will lead toanother transformation of social infrastructure in the

The possibilities opened by photonics are expanding.
We are still in the very early stage of this new
revolution.
RIKEN Center for Advanced Photonics is committed tosmaller than half of the wavelength of light in the visible

expanding the horizons of photon science.

this barrier and allow us to access the nanoworld.

Quantum Optoelectronics Research Team ................................. 07

Team Leader Yuichiro KatoTeam Leader Eiji J. Takahashi

Ultrashort Electron Beam Science RIKEN Hakubi Research Team ....... 09

RIKEN Hakubi Team Leader Yuya Morimoto

Subwavelength Photonics Research GroupLive Cell Super-Resolution Imaging Research Team ................. 10

Image Processing Research Team ............................................. 12Team Leader Hideo Yokota

destroying a sample. Terahertz wave makes thisInnovative Photon Manipulation Research Team ....................... 13

possible. Terahertz wave, which has been called theTeam Leader Takuo Tanaka“unexplored spectrum of light,” is now moving into the

Advanced Laser Processing Research Team ............................. 14

application phase thanks to advances in light sources

Team Leader Koji Sugioka

and detectors.

Terahertz-wave Research GroupIn addition, applications in the field of photonics areneutron source, all making visible what nobody has

Space-Time Engineering Research Team ................................... 06

Team Leader Hidetoshi Katori

Biotechnological Optics Research Team .................................... 11

device or look for contamination in foods without

inspection of concrete structures with a compact

Ultrafast Spectroscopy Research Team ..................................... 05

Team Leader Tahei Tahara

Team Leader Atsushi Miyawaki

We sometimes need to inspect the inner structure of aultraprecision optical lattice clocks, nondestructive

Attosecond Science Research Team .......................................... 04

Team Leader Katsumi Midorikawa

Team Leader Akihiko Nakano

spectrum, but the super-resolution microscopes breakwith metamaterials, relativistic geodesy using

Extreme Photonics Research Group

Ultrafast Coherent Soft X-ray Photonics Research Team ......... 08

current century.

thought that it was impossible to picture objects

expanding in areas such as light wave manipulation

RIKEN Center
for Advanced Photonics

Center Director

Katsumi Midorikawa

Tera-Photonics Research Team ................................................. 15

Team Leader Hiroaki Minamide

Terahertz Sensing and Imaging Research Team ....................... 16

Team Leader Chiko Otani

Terahertz Quantum Device Research Team ............................... 17

Team Leader Hideki Hirayama

Advanced Photonics Technology Development Group
Photonics Control Technology Team .......................................... 18

Team Leader Satoshi Wada

Ultrahigh Precision Optics Technology Team ............................ 19

Team Leader Yutaka Yamagata

Neutron Beam Technology Team ................................................ 20

Team Leader Yoshie Otake

Advanced Manufacturing Support Team .................................... 21

Team Leader Yutaka Yamagata

Office of the Center Director Director Akihiko Nakano

Extreme Photonics Research Group

Extreme Photonics Research Group

Attosecond Science Research Team
Team Leader

Katsumi Midorikawa

Ultrafast Spectroscopy Research Team
Team Leader

Dr.Eng.

Tahei Tahara

D.Sci.

▲

Publications

1. Midorikawa, K.: “Progress on table-top isolated
attosecond light sources” , Nature Photonics 16,
267 (2022).
2. Matsubara, T., Fukahori, S., Lötstedt, E.,
Nabekawa, Y., Yamanouchi, K., and Midorikawa,
K.: “300 attosecond response of acetylene in
two-photon ionization/dissociation processes” ,Optica 8, 1075 (2021).
3. Kanda, N., Imahoko, T., Yoshida, K., Tanabashi, A.,
Eilanlou, A. A., Nabekawa, Y., Sumiyoshi, T.,
Kuwata-Gonokami, M., and Midorikawa, K.:"Opening a new route to multiport coherent XUVsources via intracavity high-order harmonic
generation” , Light: Sci & Appl. 9, 168 (2020).
4. Lin, Y-C., Nabekawa, Y., and Midorikawa, K.:“Optical parametric amplification of sub-cycle
shortwave infrared pulses” , Nat. Commun. 11,3413 (2020).

Expanding the horizon of optical scienceby attosecond photonics

Elucidating complex molecular dynamics
with femtosecond light

Recent advances in femtosecond high-intensity laser technology have made it possible

Most of the phenomena in nature are realized by the dynamic behavior of molecules.

to generate intense ultrashort pulses of a few cycles and control their phases. As a

Among them, chemical reactions are critically important, which dynamically cause theresult, research on the nonlinear interaction between light and atoms/molecules hascleavage and formation of chemical bonds and alter the nuclei arrangement within the▲

Attosecond Science, Ultrafast Lasers, Strong Field
Physics, Nonlinear Optics, Multiphoton Microscopy

Fieldsprogressed dramatically, and new research areas such as high-order harmonic

molecules. Even non-reactive molecules are vibrating, which provides rich information

generation, Coulomb explosion, and high-energy X-ray/particle generation have been

about the molecular properties. Because the timescale of such molecular motion isborn. High-order harmonic generation can provide intense attosecond pulses that cause

femtosecond (quadrillionth), femtosecond spectroscopy is essential for elucidating

nonlinear optical phenomena in the extreme ultraviolet to soft X-ray region. The

chemical phenomena. Our team investigates the dynamics of molecules from

1. Chang, C., Kuramochi, M., Singh, M.,
Abe-Yoshizumi, R., Tsukuda, T., Kandori, H., andTahara, T.: “A unified view on varied ultrafast
dynamics of the primary process in microbial
rhodopsins” , Angew. Chem. Int. Ed. 61,
e202111930 (2022).

generation of high-order harmonics is also a unique physical phenomenon that makes it

fundamental to complex systems, as well as the molecules in special environments

possible to observe ultrafast phenomena occurring in atoms and molecules on ansuch as interfaces. We extend the frontier of molecular science through theattosecond time scale. Our team is researching extreme nonlinear optics anddevelopment and use of advanced spectroscopic methods.

attosecond

atomic/molecular dynamics using a high-intensity attosecond pulse light

Chemistry, Physics, Biology / Biochemistry▲▲

Keywords▲▲

FieldsInterdisciplinary Science and Engineering,Engineering, Physics, Chemistry

Keywords

Ultrafast spectroscopy, Nonlinear spectroscopy,
Single molecule spectroscopy,
Dynamics, Interface

Publications

2. Kuramochi, H., and Tahara, T.: “Tracking ultrafast
structural dynamics by time-domain Raman
spectroscopy” , J. Am. Chem. Soc. 143, 9699
(2021). Perspective
3. Kusaka, R., Nihonyanagi, S., and Tahara, T.: “Thephotochemical reaction of phenol becomes
ultrafast at the air–water interface” , Nat. Chem.
13, 306 (2021).
4. Inoue, K., Ahmed, M., Nihonyanagi, S., and Tahara,
T.: “Reorientation-induced relaxation of free OH at
the air/water interface revealed by ultrafast
heterodyne-detected nonlinear spectroscopy” ,Nat. Commun. 11, 5344 (2020).

source.

5. Xue, B., Tamaru, Y., Yuan, H., Lan, P., Mücke, O. D.,
Suda, A., Midorikawa, K., and Takahashi, E. J.:“Fully stabilized multi-TW optical waveform
synthesizer: Toward gigawatt isolated attosecond
pulses” , Science Advances 6, eaay2820 (2020).

5. Ahmed, M., Inoue, K., Nihonyanagi, S., and Tahara,
T.: “Hidden isolated OH at the charged
hydrophobic interface revealed by
two-dimensional heterodyne-detected VSFG
spectroscopy” , Angew. Chem. Int. Ed. 59, 9498
(2020).

▲

Member▲Yasuo Nabekawa / Yutaka Nagata /Keisuke Isobe / Tomoya Okino /MemberKunihiko Ishii / Satoshi Nihonyanagi /Takashige Fujiwara / Yu-Chieh Lin /Korenobu Matsuzaki / Ahmed Mohammed

Takayuki Michikawa / Kaoru Yamazaki /Bing Xue / Lu Xu / Giang Nahan Tran /Tohru Kobayashi / Takiko Wakabayashi
Autocorrelation waveform of attosecond pulse train
measured with carbon ion yield from acetylene
Coherent nuclear motion of the chromophor of a protein in reaction

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Extreme Photonics Research Group

Extreme Photonics Research GroupSpace-Time Engineering Research Team
Team Leader

Hidetoshi Katori

Quantum Optoelectronics Research Team
Team Leader

D.Eng.

Yuichiro Kato

Ph.D.

▲

Keywords

Towards optoelectronic devices that utilize
the quantum nature of electrons and photons

Clocks have served as a tool to share time, based on universal periodic phenomena;

Advances in device fabrication techniques have enabled integration of individual

humankind relied upon the rotation of the earth from antiquity. The radiation from annanomaterials, where single electrons and single photons could be addressed. We
exploit state-of-the-art nanofabrication technologies to develop and engineer

sense the relativistic space-time curved by gravity, which reveal the difficulty of sharing

optoelectronic devices with novel functionalities that can only be achieved by utilizingtime with others. Moreover, such clocks may be used to investigate the constancy ofthe quantum nature of electrons and photons at the nanoscale. We investigate devices

2. Ushijima, I., Takamoto, M., and Katori, H.: “Operational
magic intensity for Sr optical lattice clocks” , Phys.
Rev. Lett. 121, 263202 (2018).

fundamental constants, where the foundation of the atomic clocks is anchored.

that would allow for control over the interactions between electrons and photons at the

Optical lattice clocks raised the possibility of ultra-stable and accurate timekeeping by

quantum mechanical level, which would lead to quantum photon sources andapplying the "magic wavelength" protocol on optical lattices. Since the proposal of the

optical-to-electrical quantum interfaces.

▲

atom provides us with far more accurate periodicity. The state-of-the-art atomic clocks

1. Takamoto, M., Ushijima, I., Ohmae, N., Yahagi, T.,
Kokado, K., Shinkai, H., and Katori, H.: "Test of generalrelativity by a pair of transportable optical latticeclocks", Nat. Photonics 14, 411-415 (2020).

3. Takano, T., Takamoto, M., Ushijima, I., Ohmae, N.,
Akatsuka, T., Yamaguchi, A., Kuroishi, Y., Munekane, H.,
Miyahara, B., and Katori, H.: “Geopotential
measurements with synchronously linked opticallattice clocks” , Nat. Photonics 10, 662-666 (2016).
4. Yamanaka, K., Ohmae, N., Ushijima, I., Takamoto, M.,
and Katori, H.: “Frequency ratio of 199Hg and 87Sr
optical lattice clocks beyond the SI limit” , Phys. Rev.
Lett. 114, 230801 (2015).
5. Ushijima, I., Takamoto, M., Das, M., Ohkubo, T., andKatori, H.: “Cryogenic optical lattice clocks” , Nat.
Photonics 9, 185-189 (2015).

▲

Member

Masao Takamoto / Atsushi Yamaguchi

scheme in 2001, the optical lattice clocks are being developed by more than 20 groups in

Keywords

Optoelectronics, Quantum devices, Nanoscale
devices, Carbon nanotubes, Photonic crystals▲

Publications

Relativistic Space-Time Engineeringwith Ultra Precise Atomic Clocks

FieldsInterdisciplinary Science and Engineering,Engineering, Mathematical and physical sciences,
Chemistry▲

Quantum electronics, Atomic clock, Quantum
metrology, Optical lattice clock, Relativistic geodesy▲▲

FieldsInterdisciplinary Science and Engineering,Engineering

Publications

1. Li, Z., Otsuka, K., Yamashita, D., Kozawa, D., andKato, Y. K.: “Quantum emission assisted by energy
landscape modification in pentacene-decorated
carbon nanotubes” , ACS Photonics 8, 2367 (2021).
2. Otsuka, K., Fang, N., Yamashita, D., Taniguchi, T.,
Watanabe, K., and Kato, Y. K.: “Deterministictransfer of optical-quality carbon nanotubes foratomically defined technology” , Nature Commun.
12, 3138 (2021).
3. Ishii, A., Machiya, H., Kato, Y. K.: “High efficiency
dark-to-bright exciton conversion in carbon
nanotubes” , Phys. Rev. X 9, 041048 (2019).

the world, and the clocks are surpassing the uncertainty of the current SI second, becoming

4. Ishii, A., Uda, T., Kato, Y. K.: “Room-temperaturesingle-photon emission from micrometer-longair-suspended carbon nanotubes” , Phys. Rev.
Applied 8, 054039 (2017).

one of the most promising candidates for the future redefinition of the second.
Our team develops highly precise and transportable optical lattice clocks capable oflong time operation by introducing advanced techniques in the field of atomic physics

5. Jiang, M., Kumamoto, Y., Ishii, A., Yoshida, M.,
Shimada, T., Kato, Y. K.: “Gate-controlled
generation of optical pulse trains using individualcarbon nanotubes” , Nature Commun. 6, 6335
(2015).

and quantum optics; we thus explore applications of "space-time engineering" that fully
utilize the novel time resource provided by such clocks. For example, a transportableultraprecise atomic clock, which may be taken out into the field, will function as a▲

Membergravitational potential meter. We experimentally investigate the impact of such
relativistic geodesy and new roles for clocks in the future.

Daichi Kozawa / Shun Fujii / Daiki Yamashita

Scanning electron micrograph of a suspended carbon nanotube field effect transistor

Remote frequency comparison of optical lattice clocks between RIKEN and the Universityof Tokyo (UTokyo) reveals their different tick rates as predicted by general relativity.

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Extreme Photonics Research Group

Extreme Photonics Research Group

Ultrafast Coherent Soft X-ray Photonics Research Team
Team Leader

Eiji J. Takahashi

Ultrashort Electron Beam Science RIKEN Hakubi Research TeamRIKEN Hakubi Team Leader Yuya Morimoto Ph.D.

D.Eng.

▲

Keywords▲

1. Bing, X., Tamaru, Y., Fu, Y., Yuan, H., Lan, P., Mücke,O.D., Suda, A., Midorikawa, K., and Takahashi, E.J.: “ACustom-Tailored Multi-TW Optical Electric Field for
Gigawatt Soft-X-Ray Isolated Attosecond Pulses” ,Ultrafast Science 2021: 9828026 (2021).
2. Nishimura, K., Yuxi, F., Suda, A., Midorikawa, K., andTakahashi, E.J.: “Apparatus for generation of
nanojoule-class water-window high-order harmonics” ,Rev. Sci. Instrum. 92: 063001 (2021).

Space-time imaging of the initial steps ofchemical reactions with ultrashort electron beams

Laser is the ultimate light source created by mankind, and it has become an indispensable

Electron beams are used for examples in electron microscopy and electron-beam

tool for our social life. In this laboratory, our main goal is to create an unexplored ultrafast

lithography, where high spatial resolution is required. By using state-of-the-art laser andlaser by using the extreme nature of laser such as ultrashort pulse, super broadband, highelectron-beam technologies, we control the temporal structure of an electron beam withpower, and so on. Specifically, we are developing a high-power a few-cycle laser source,

ultimate attosecond resolution and apply the controlled electron beams for imaging andand using it to develop novel laser source with full coherence in the soft x-ray region and acontrolling ultrafast chemical reactions. We explore the atomic-scale dynamics ofpulse width of attosecond region. We extend the frontier of laser science through theelectrons in a material which is the initial step of most photochemical reactions.

development of novel laser sources.

Keywords

Ultrashort electron beam, Electron beam imaging,
Nonlinear optics, Attosecond science,
Atomic collisions▲

Publications

Creating novel ultrafast soft x-ray sources
using the extreme nature of laser

FieldsChemistry, Physics,
Interdisciplinary Science and Engineering,Engineering▲

High-power a few-cycle laser, Coherent soft x-ray,
Quantum beam, Strong-field physics,
Ultrafast soft x-ray photonics▲▲

FieldsInterdisciplinary Science and Engineering,Engineering, Complex systems

Publications

1. Morimoto, Y., Shinohara, Y., Ishikawa, K.L., andHommelhoff, P.: “Atomic real-space perspective oflight-field-driven currents in graphene” , New J.
Phys. 24, 033051 (2022).
2. Morimoto, Y., Shinohara, Y., Tani, M., Chen, B.H.,
Ishikawa, K.L., and Baum, P.: “Asymmetric
single-cycle control of valence electron motion inpolar chemical bonds” , Optica 8, 382 (2021).
3. Morimoto, Y., Hommelhoff, P., and Madsen, L.B.:“Coherent scattering of an optically-modulated
electron beam by atoms” , Phys. Rev. A 103,
043110 (2021).

3. Bing, X., Tamaru, Y., Fu, Y., Yuan, H., Lan, P., Mücke,O.D., Suda, A., Midorikawa, K., and Takahashi, E.J.:“Fully stabilized multi-TW optical waveform
synthesizer: Toward gigawatt isolated attosecond
pulses” , Science Advances 6: eaay2802 (2020).

4. Morimoto, Y., and Baum, P.: “Single-Cycle OpticalControl of Beam Electrons” , Phys. Rev. Lett. 125,
193202 (2020).

4. Yuxi, F., Nishimura, K., Shao, R., Suda, A., Midorikawa,
K., Lan, P., and Takahashi, E.J: “High efficiency
ultrafast water-window harmonic generation for
single-shot soft X-ray spectroscopy” , Communications
Physics 3: 92 (2020).

5. Morimoto, Y., and Baum, P.: “Diffraction andmicroscopy with attosecond electron pulse
trains” , Nat. Phys. 14, 252 (2018).
▲

5. Lu, X., Nishimura, K., Suda, A., Midorikawa, K., Fu, Y.,
and Takahashi, E.J.: “Optimization of a multi-TW
few-cycle 17-μm source based on Type-I BBO
dual-chirped optical parametric amplification” , Optics
Express 28: 15138-47 (2020).

MemberYuichi Tachibana▲

MemberYasuo Nabekawa / Lu Xu / Giang Nahan Tran

Light-wave modulation of an electron beam
Emission from the generating medium of coherent soft x-ray

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Subwavelength Photonics Research Group

Subwavelength Photonics Research GroupLive Cell Super-Resolution Imaging Research Team
Team Leader

Akihiko Nakano

Biotechnological Optics Research Team
Team Leader

D.Sci.

Atsushi Miyawaki

M.D., Ph.D

Membrane traffic, Vesicular transport,
Super-resolution live imaging,
Confocal microscopy, Organelles

1. Nakano, A.: “The Golgi apparatus and its
next-door neighbors” , Frontiers Cell Dev. Biol. inpress (2022).
2. Shimizu, Y., Takagi, J., Ito, E., Ito, Y., Ebine, K.,
Komatsu, Y., Goto, Y., Sato M., Toyooka, K., Ueda,
T., Kurokawa, K., Uemura, T., and Nakano, A.:“Cargo sorting zones in the trans-Golgi network
visualized by super-resolution confocal live
imaging microscopy in plants” , Nat. Commun.
12:1901 (2021).

Bioimaging Technologies
by use of glowing proteins

Light is a cutting-edge tool for life science research. Development of useful fluorescent

We label a fluorescent probe on a specific region of a biological molecule and bring itprobes and the advancement of light microscope technologies have brought us a new

back into a cell. We can then visualize how the biological molecule behaves in responseworld of “live” imaging within a cell. We are developing super-resolution confocal live

to external stimulation. Since fluorescence is a physical phenomenon, we can extract

imaging microscopy (SCLIM) by the combination of a high-speed confocal scanner and avarious kinds of information by making full use of its characteristics. For example, thehigh-sensitivity camera system. With this method we will observe membrane trafficking

excited energy of a fluorescent molecule donor transfers to an acceptor relative to theand organellar dynamics in living cells at high-speed and sub-wavelength space resolution

distance and orientation between the two fluorophores. This phenomenon can be used

(4D) and elucidate underlining molecular mechanisms. We will also try to extend thisto identify interaction between biological molecules or structural change in biological

technology to medical and pharmacological applications.

molecules. Besides, we can apply all other characteristics of fluorescence, such aspolarization, quenching, photobleaching, photoconversion, and photochromism, inexperimentation. Cruising inside cells in a super-micro corps, gliding down in a

3. Rodriguez-Gallardo, S., Kurokawa, K.,
Sabido-Bozo, S., Cortes-Gomez, A., Ikeda, A.,Zoni, V., Aguilera-Romero, A., Perez-Linero, A.M.,
Lopez, S., Waga, M., Araki, M., Nakano, M.,
Riezman, H., Funato, K., Vanni, S., Nakano, A.,
and Muñiz, M.: “Ceramide chain
length-dependent protein sorting into selective
endoplasmic reticulum exit sites” , Sci. Adv.
6:eaba8237 (2020).

microtubule like a roller coaster, pushing our ways through a jungle of chromatin while
hoisting a flag of nuclear localization signal --- we are reminded to retain a playful andadventurous perspective at all times. What matters is mobilizing all capabilities ofscience and giving full play to our imagination.

Keywords

Bio-imaging, Fluorescence protein,
Chromophore group▲▲

Publications

Observe nano-scale activities within a living cellby sub-wavelength high-speed imaging

FieldsMedicine, dentistry, and pharmacy,
Engineering, Biological Sciences,
Biology / Biochemistry▲▲

Keywords▲▲

FieldsBiological Sciences, Complex systems,
Interdisciplinary science and engineering,
Biology / Biochemistry

Publications

1. Michikawa, T., Yoshida, T., Kuroki, S., Ishikawa, T.,
Kakei, S., Kimizuka, R., Saito, A., Yokota, H., Shimizu, A.,
Itohara, S., and Miyawaki, A.: “Distributed sensory
coding by cerebellar complex spikes in units ofcortical segments” , Cell Rep.37(6), 109966 (2021).
2. Katayama, H., Hama, H., Nagasawa, K., Kurokawa, H.,
Sugiyama, M., Ando, R., Funata, M., Yoshida, N.,
Homma, M., Nishimura, T., Takahashi, M., Ishida, Y.,
Hioki, H., Tsujihata, Y., and Miyawak,i A.: “Visualizing
and Modulating Mitophagy for Therapeutic Studies of
Neurodegeneration” , Cell 181(5), 1176-1187 (2020).
3. Iwano, S., Sugiyama, M., Hama, H., Watakabe, A.,
Hasegawa, N., Kuchimaru, T., Tanaka, KZ., Takahashi,
M., Ishida, Y., Hata, J., Shimozono, S., Namiki, K.,
Fukano, T., Kiyama, M., Okano, H., Kizaka-Kondoh, S.,
McHugh, TJ., Yamamori, T., Hioki, H., Maki, S., andMiyawaki, A.: “Single-cell bioluminescence imaging ofdeep tissue in freely moving animals” , Science, 359(6378): 935-939. (2018).

4. Tojima, T., Suda, Y., Ishii, M., Kurokawa, K., andNakano, A.: “Spatiotemporal dissection of thetrans-Golgi network in budding yeast” , J. Cell
Sci. 132:jcs231159 (2019).

4. Sakaue-Sawano, A., Yo, M., Komatsu, N., Hiratsuka, T.,
Kogure, T., Hoshida, T., Goshima, N., Matsuda, M., andMiyawaki, A.: “Genetically encoded tools for opticaldissection of the mammalian cell cycle” , Mol. Cell, 68:
626-640. (2017).

5. Kurokawa, K., Osakada, H., Kojidani, T., Suda, Y.,
Asakawa, H., Haraguchi, T., and Nakano, A.:“Visualization of secretory cargo transport
within the Golgi apparatus in living yeast cells” ,J. Cell Biol. 218:1602-1618 (2019).

5. Hama, H., Hioki, H., Namiki, K., Hoshida, T., Kurokawa,
H., Ishidate, F., Kaneko, T., Akagi, T., Saito, T., Saido, T.,
and Miyawaki, A.: “ScaleS: an optical clearing palette
for biological imaging” , Nat. Neurosci. 18 (10),1518-1529 (2015).
▲▲

Member(Left) SCLIM2 microscope.
(Right) Yeast trans-Golgi network (red) and clathrin-coated vesicles (green) assembling andleaving there. Captured from a high-speed 3D movie taken by SCLIM2.

MemberMasahiko Hirano / Asako Tosaki

Kazuo Kurokawa / Takuro Tojima / Natsuko Jin /Daisuke Miyashiro / Tomohiro Uemura /Yasuyuki Suda / Yoko Ito / Emi Ito / Kumiko Ishii /Miho Waga / Hideo Hirukawa
Cultured HeLa cells expressing the photoconvertible fluorescent protein, Keade.
Before (left) and after (right) multiple, local irradiation of violet laser light,
green-to-red color conversion occurred in the cytosol or nucleus of targeted cells.

1011Subwavelength Photonics Research Group

Subwavelength Photonics Research Group

Image Processing Research Team
Team Leader

Hideo Yokota

Innovative Photon Manipulation Research Team
Team Leader

D.Eng.

Takuo Tanaka

D.Eng.

1. Tamura, N., Goto, S., Yokota, H., and Goto, S.:"Contributing Role of Mitochondrial Energy
Metabolism on Platelet Adhesion, Activation andThrombus Formation under Blood Flow
Conditions", Platelets 1-7 (2022).
2. Yamashita, N., Matsuno, T., Maeda, D., Kikuzuki, M.,
and Yokota, H.: “Efficient 3D observation of steel
microstructure using serial sectioning with
precision cutting and on-site etching” , Precision
Engineering 75, pp.37-45 (2022).

Image processing researchfor scientific information

Lightwave manipulation
by subwavelength structures

Our goal is to develop original RIKEN data processing technology and multidimensional

Our team intensively studies novel photon manipulation technologies using knowledge

measurement technology in order to contribute to understanding biological phenomena.

and experiences obtained from the researches on light wave interaction withWe are especially contributing to the fields of mathematical biology, bio-medical

sub-wavelength fine structures. These photon manipulation technologies will be applied

simulations as well as medical diagnostic and treatment technology by researching andfor three-dimensional nanofabrication systems, ultra-high sensitive molecular sensing

developing new data and image processing technologies and establishing new tools fordevices, and so on. Figure (a) shows a scanning electron microscope image of RIKEN’ squantification of biological phenomena, intended for researchers both inside and outside

logo consists of a sub-wavelength aluminum structure, which absorbs light of certain

1. Jung, W., Jung, Y., Pikhitsa, P., Feng, J., Yang, Y.,
Kim, M., Tsai, H., Tanaka, T., Shin, J., Kim, K., Choi,
H., Rho, J., and Choi, M.: "Three-dimensional
nanoprinting via charged aerosol jets", nature 592,
54 (2021).

RIKEN.

wavelength determined by its size and shape. Figure (b) shows an observed image ofEngineering, Complex systems,
Interdisciplinary science and engineering▲▲

Publications

the RIKEN’ s logo under white light illumination. Figure (c) shows a demonstrated color

3. Takematsu, M., Umezawa, M., Sera, T., Kitagawa, Y.,
Kurahashi, H., Yamada, S., Okubo, K., Kamimura,M., and Yokota, H., Soga, K.: “Influence of thedifference in refractive index on the interface of an
object and the surrounding in near-infrared
fluorescence tomography” , Applied Optics (2021).

palette covering a broad gamut of colors.

5. Hori, K., Ikematsu, H., Yamamoto, Y., Matsuzaki, H.,
Takeshita, N., Shinmura, K., Yoda, Y., Kiuchi, T.,
Takemoto, S., Yokota, H., and Yano, T.: “Detectingcolon polyps in endoscopic images using artificial
intelligence constructed with automated collectionof annotated images from an endoscopy reporting
system” , Digestive Endoscopy (2021).

Metamaterials, Plasmonics, Nanophotonics,
Near-ﬁeld Optics, Applied Optics

Publications

2. Luo, T., Chu, C., Vyas, S., Kuo, H., Chia, Y., Chen, M.,
Shi, X., Tanaka, T., Misawa, H., Huang, Y., and Tsai,
D.: "Varifocal Metalens for Optical Sectioning
Fluorescence Microscopy", Nano Letters 21,
5133-5142 (2021).
3. Olaya, C. M., Hayazawa, N., Hermosa, N., andTanaka, T.: "Angular Goos-H nchen shift sensor
using gold film enhanced by surface plasmon
resonance", J. Phys. Chem. A 125, 451-458(2021).

5. Le, H.-H.-T., Morita, A., Mawatari, K., Kitamori, T.,
and Tanaka, T.: "Metamaterials-Enhanced Infrared
Spectroscopic Study of Nanoconfined Molecules
by Plasmonics-Nanofluidics Hydrid Device", ACS
Photonics 5, 3179-3188 (2018).
▲▲

MemberMemberNorihiko Hayazawa /Shin Yoshizawa / Satoshi Oota / Shigeho Noda /Masahiko Morita / Norio Yamashita / Zhe Sun /Keywords

4. Balois, M. V., Hayazawa, N., Yasuda, S., Ikeda, K.,
Yang, B., Kazuma, E., Yakota, Y., Kim, Y., andTanaka, T.: “Visualization of subnanometric local
phonon modes in a plasmonic nanocavity via
tip-enhanced Raman spectroscopy in ambient” ,NPJ 2D Mater. Appl. 3, 38 (2019).

4. Michikawa,T., Yoshida, T., Kuroki, S., Ishikawa, T., Kakei,
S., Kimizuka, R., Saito, A., Yokota, H., Shimizu, A., Itohara,S., and Miyawaki, A.: “Distributed sensory coding by
cerebellar complex spikes in units of corticalsegments” , Cell Reports 37,6, 109966 (2021).

Takashi Michikawa / Satoko Takemoto /Fields▲▲Keywords

Multi dimensional image processing,Multi dimensional imaging, Bioengineering,
Image analysis, Medical engineering▲▲

FieldsEngineering, Informatics, Computer Science

Maria Vanessa Balois Oguchi /Image Processing Cloud

Maria Herminia Marallag Balgos /Sakiko Nakamura / Yuki Tsujimura /Cherrie May Mogueis Olaya /Xianping Zhang / Hiroaki Iwase /Takashi Yamaguchi

Takashi Uematsu

Colors created by metamaterial absorber that consists of subwavelength aluminum structure.

12

13

Terahertz-wave Research Group

Subwavelength Photonics Research Group

Advanced Laser Processing Research Team
Team Leader

Koji Sugioka

Team Leader

D.Eng.

Femtosecond laser, Laser processing,Micro/nanofabrication, 3D fabrication, Biochip

1. Zhang, D., Li, X., Fu, Y., Yao, Q., Li, Z., and Sugioka,
K.: “Liquid vortexes and flows induced byfemtosecond laser ablation in liquid governing
formation of circular and crisscross LIPSS” ,Opto-Electron. Adv. 5, 210066 (2022).
2. Bai, S., Serien, D., Ma, Y., Obata, K., and Sugioka,
K.: “Attomolar sensing based on liquid-interface
assisted surface enhanced Raman scattering in
microfluidic chip by femtosecond laser
processing” , ACS Appl. Mater. Interfaces 12,42328–4233 (2020).
3. Bai, S., Serien, D., Hu, A., and Sugioka, K.:“Three-dimensional microfluidic SERS chips
fabricated by all-femtosecond-laser- processing
for real-time sensing of toxic substances” , Adv.
Funct. Mater. 28, 1706262 (2018).

Femtosecond Laser 3D Micro/Nanofabrication:
Creation of 3D Structures Made of Pure Protein

Leading Terahertz science & applications
with innovative Tera-photonics technology

Our research team is developing advanced laser processing techniques which realize

Our team develops state-of-the-art frequency-tunable THz-wave sources which exploit

low environmental load, high quality, high efficiency fabrication of materials. In

new THz-wave application fields. A nonlinear optical process is utilized for realizing theparticular, by using femtosecond lasers, novel material processing techniques includingTHz-wave source which lights up the THz-wave gray zone, and our original design and

3D fabrication, surface nanostructuring, novel nanomaterial synthesis, and tailoredmethod will be demonstrated. We develop THz sources with high output, wide tunability,

beam processing are developed, which are applied for fabrication of functional

high stability and narrow linewidth.

micro/nanodevices. As one of examples of the 3D fabrication, our team successfully

Active collaboration with both internal and external research groups is carried out for

created a 3D complex shape of pure protein such as bovine serum albumin (BSA).

exploring new applications by development of instrument combined with new THz-wave

Furthermore, enhanced green fluorescent protein and enhanced blue fluorescent protein

sources. Advanced THz-wave technologies are also being developed in cooperation

were formed on a single substrate to realize a two-color fluorescence image exhibiting awith industry to establish practical THz-wave sources and technologies in the world.

RIKEN logo. The 3D proteinaceous micro and nanostructures fabricated by thistechnique will offer many applications including cell culture, tissue engineering,biochips, micromachines, etc.

FieldsEngineering,Interdisciplinary science and engineering

Keywords

Development of kilo-watt-power Terahertz-wave
source, Sensitive Terahertz-wave detection,
Terahertz-wave applications,Nondestructive measurements, Nonlinear optics▲▲

Publications

D.Eng.

▲▲

Keywords

Hiroaki Minamide▲▲

FieldsEngineering, Materials Sciences,
Interdisciplinary science and engineering,Multidisciplinary

Tera-Photonics Research Team

Publications

1. Takida, Y., Nawata, K., Notake, T., Otsuji, T., andMinamide, H.: "Optical up-conversion-based
cross-correlation for characterization of
sub-nanosecond terahertz-wave pulses” , Optics
Express 30, 7, 11217–11227 (2022).
2. 南出泰亜, "後進テラヘルツ波パラメトリック光源",CSJ 42 Current Review42 赤外線の化学利用-近赤外からテラヘルツまで-, 32-36 (2021).
3. Minamide, H., Nawata, K., Moriguchi, Y., Takida, Y.,
and Notake T.: "Injection-seeded terahertz-wave
parametric generator with timing stabilized
excitation for nondestructive testing applications",
Review of Scientific Instruments 92, 9, 093002, 1-8(2021).
4. Shibuya, K., Nawata, K., Nakajima, Y., Fu, Y.,
Takahashi, E., Midorikawa, K., Yasui, T., andMinamide, H.: "Characteristics of nonlinear
terahertz-wave radiation generated by mid-infrared
femtosecond pulse laser excitation", Appl. Phys.
Express 14, 9, 092004 (2021).

4. Wu, D., Xu, J., Niu, L., Wu, S., Midorikawa, K., and
Sugioka, K.: “In-channel integration of designablemicrooptical devices using flat
scaffold-supported femtosecond-laser
microfabrication for coupling-free optofluidic cellcounting” , Light Sci. Appl. 4, e228 (2014).

5. Han, Z., Ohno, S., and Minamide, H.:“Electromagnetic Wave Tunneling from
Metamaterial Antiparallel Dipole Resonance” , Adv.
Photonics Res. 2, 2000186, 1-7 (2021).

5. Sugioka, K., and Cheng, Y.: “Femtosecond laser
three-dimensional micro- and nanofabrication” ,Appl. Phys. Rev. 1, 041303 (2014).

▲▲

MemberMemberYuma Takida / Takashi Notake / Kouji Nawata /Kotaro Obata / Jiawei Zhang /Seigo Ohno / Yoshikiyo Moriguchi

Shi Bai / Kazunari Ozasa / Felix Sima /Daniela Serien

Backward terahertz parametric oscillator（left）and organic nonlinear crystals（right）(Left) Complex 3D microstructure of Bovine serum albumin (BSA）fabricated by femtosecond laser
3D printing(Right) RIKEN logo fabricated by femtosecond laser 3D printing of EBFP and EGFP.

14

15

Terahertz-wave Research GroupTerahertz-wave Research GroupTerahertz Sensing and Imaging Research Team
Team Leader

Chiko Otani

D.Sci

Terahertz Quantum Device Research Team
Team Leader

Hideki Hirayama

D.Eng.

Interdisciplinary science and engineering,Engineering, Space Science,
Chemistry, Physics, Molecular Biology / Genetics,
Agricultural Sciences

Terahertz science, Terahertz spectroscopy,
Terahertz imaging, Terahertz control,
Superconducting detector

1. Feng, C. H., Otani, C., and Ogawa, Y.: “Innovatively
identifying naringin and hesperidin by using
terahertz spectroscopy and evaluating flavonoids
extracts from waste orange peels by couplingwith multivariate analysis” , Food Control vol.137,
108897 (2022).
2. Yamazaki, S., Ueno, Y., Hosoki, R., Saito, T., Idehara, T.,
Yamaguchi, Y., Otani, C., Ogawa, Y., Harata, M., andHoshina, H.: “THz irradiation inhibits cell division byaffecting actin dynamics” , PloS One 16, e0248381(2021).

soft materials and their spectral absorption features. These characteristics can be utilized
for many applications in various scientific and industrial fields. In this team, we aredeveloping novel technology, science and applications in THz sensing and imaging.
Especially, we have promoted the research of THz spectroscopy of macromolecules, thechallenge to the control of molecular structures and functions by the strong THz fields,
the research of THz spectroscopy of macromolecules, and the development ofhigh-sensitivity imaging detectors and their applications to the observational research aswell as the collaborative research and development for its practical applications.

Terahertz light having both the transparency of radio wave and the high resolution of lightis expected to be used in a wide range of application fields as a light source for various
perspective and nondestructive inspections. We are developing THz-QCL (terahertz
quantum-cascade laser), which is expected to be a very compact, portable, high power
terahertz light source. Through the introduction of a new quantum subband structure
and/or nitride semiconductors, THz-QCL aiming for implementation in society is being
developed by performing room temperature oscillation and enlarging the operating
frequency region which have been impossible so far. By developing the next generationcompact terahertz imaging devices, we would like to contribute to the realization of aprosperous society in the near future.

3. Momiyama, H., Sasaki, Y., Yoshimine, I., Nagano, S.,
Yuasa, T., and Otani, C.: “Depth super-resolved imaging
of infrastructures defects using a terahertz-wave
interferometer” , NDT&E Int’ l. vol. 120, 102431 (2021).
4. Yamashita, M., and Otani, C.: “Intrinsic and extrinsic
effects on intraband optical conductivity of hot carriersin photoexcited graphene” , Physical Review Research
3, 013150 (2021).

1. Wang, L., Lin, T., Wang, K., Grange, T., andHirayama, H.: “Leakages suppression by isolating
the desired quantum levels for high temperatureterahertz quantum cascade lasers” , Scientificreports 11, 23634 (2021).
2. Wang, L., Lin, T., Wang, K., Grange, T., andHirayama, H.: “Engineering ofelectron–longitudinal optical phonon couplingstrength in m-plane GaN terahertz quantum
cascade lasers” , Applied physics Express 14, 11,112003 (2021).
3. Wang, L., Lin, T., Wang, K., Grange, T., Birner, S. andHirayama, H.: “Short-period scattering-assisted
terahertz quantum cascade lasers operating athigh temperatures” , Scientific Reports 9, 9446
(2019).

5. Lin, T., Wang, L., Wang, K., Grange T. and Hirayama, H.:“Optimization of terahertz quantum cascade lasers by
suppressing carrier leakage channel via high-energy
state” , Appl. Phys. Express 11, 11, 112702 1-5 (2018).

▲▲

Member

Hiromichi Hoshina / Yoshiaki Sasaki /Yuya Ueno

Publications

4. Wang, L., Lin, T., Wang, K., and Hirayama, H.:“Parasitic transport paths in two-wellscattering-assisted terahertz quantum cascadelasers” , Applied Physics Express 12, 8, 082003-1-5(2019).

5. Ikeda, S., Yamashita, M., and Otani, C.: “Hot carrier
dynamics and electron-phonon coupling inphotoexcited graphene via time-resolved
ultrabroadband terahertz spectroscopy” , PhysicalReview Research 3, 043143 (2021).

Javier Miguel Hernandez / Mingxi Chen /Keywords

Terahertz, Quantum cascade lasers,
Inter-subband transition,
Nitride semiconductors lasers,
Molecular-beam epitaxy▲▲

Publications

Terahertz (THz) wave has the unique characteristics such as the transparency to many

Development ofcompact and potable terahertz laser source

Fields

Optical Devise Engineering, Quantum Electronics,
Semiconductor Physics▲▲

Keywords

Terahertz Sensing,
Imaging and Applications▲▲

FieldsMemberTsungTse Lin / Li Wang / Masafumi Jo /Ke Wang(Left) Fluorescent microscope images of biopolymer (actin filaments).
(Right) The number of actin filaments with or without THz irradiation.

Schematic structure and operating properties of terahertz quantum-cascade laser (THz-QCL)

16

17

Advanced Photonics Technology Development Group

Advanced Photonics Technology Development Group

Ultrahigh Precision Optics Technology Team

Photonics Control Technology Team
Team Leader

Satoshi Wada

Team Leader

Ph.D.

Yutaka Yamagata

D.Eng.

Engineering, Physics, Biology / Biochemistry,
Agricultural Sciences,
Medicine, dentistry, and pharmacy

Development of photonics control technology
for science and social issues

Developing advanced optical components
by ultrahigh precision technology
Our team develops advanced ultrahigh-precision/micro fabrication technologies and theirand energy problems. We are mainly developing remote-sensing system of poisonous

application to scientific apparatuses and devices to support advanced scientific researchgas, lidar as an atmospheric monitor for high energy cosmic ray observation, andat RIKEN. Research and development plans of our team include the following four topics:

1. Miyata, K., Kato, K., Wada, S., and Petrov, P.:"Thermo-optic dispersion properties of CdSe forparametric nonlinear interactions", Opt. Mater.
Express 12, 963-969 (2022).

solar-pumped laser for advanced energy source. We are also developing tunable(1) Development of ultrahigh-precision optics including design, fabrication, metrology andlaser-based biosensors for biomedical and agricultural applications. These researches

computational simulation; (2) Development of ultrahigh-precision/micro fabrication

2. Fujii, K., Goto, T., Koike, K., Sugiyama, M.,
Nakamura, S., and Wada, S.: “Carrier Pathway for
Photoelectrochemical Water Oxidation with
Intermediate State in n-type GaN Compared with
Route of Anodic Corrosion” , The Journal of
Physical Chemistry C 125 (16), 8562-8569 (2021).

will contribute to build and to maintain social environment that humans can live safely.

technologies; (3) Development of materials and devices for biology or biochemistry such

Moreover, we are investigating fundamental research topics including particle control

as microfluidic immunoassay devices.

with high power Lyman α coherent source, and development of laser pumped neutron

In all R&D topics, our team collaborates with laboratories inside and outside of RIKEN andsource. New applied researches were performed on the basis of basic research of laser

helps them to construct the most advanced experimental apparatuses, which will lead tomaterials, and nonlinear optics.

innovative scientific research results.

▲

Publications

3. Matsuura, R., Lo, CW., Wada, S., Somei, J., Ochiai,
H., Murakami, T., Saito, N., Ogawa, T., Shinjo, A.,
Benno, Y., Nakagawa, M., Takei, M., and Aida.,Y.:“SARS-CoV-2 disinfection of air and surface
contamination by TiO2 photocatalyst-mediateddamage to viral morphology, RNA, and protein” ,Viruses 13, 942 (2021).
4. Tsuyama, S., Taketani, A., Murakami, T., Sakashita,M., Miyajima, S., Ogawa, T., Wada, S., Maeda, H.,
and Hanada, Y.: “Quantitative prediction of afunctional ingredient in apple using Raman
spectroscopy and multivariate calibration
analysis” , Appl. Phys. B 127, 92 (2021).

(a)

(b)

(c)

Publications

1. Heacock, B., Fujiie, T., Haun, W.R.,.Henins, A.,
Hirota, K., Hosobata, T., Huber, M.G., Kitaguchi,
M., Pushin, D.A., Shimizu, H., Takeda, M.,
Valdillez, R., Yamagata, Y., and Young,
A.R.:"Pendellosung interferometry probes theneutron charge radius, lattice dynamics, andfifth forces", Science 373, 1239-1243 (2021).
2. Yamada, N., L., Hosobata, T., Nemoto, F., Hori,
K., Hino, M., Izumi, J., Suzuki, K., Hirayama, M.,
Kanno, R., and Yamagata, Y.: “Application of
precise neutron focusing mirrors for neutronreflectometry: latest results and future
prospects” , J. Appl. Cryst. 53 (2020).
3. Saiki, T., Hosobata, T., Kono, Y., Takeda, M., Ishijima,A., Tamamitsu, M., Kitagawa, Y., Goda, K., Morita, S.,
Ozaki, S., Motohara, K., Yamagata, Y., Nakagawa, K.,
and Sakuma, I.:"Sequentially timed all-opticalmapping photography boosted by a branched 4f
system with a slicing mirror", Opt. Express 28,
31914-31922 (2020).

(d)

5. Yumoto, M., Kawata, Y., Abe, T. Matsuyama, T.,
and Wada, S.: ” Non-destructive mid-IR
spectroscopy with quantum cascade laser can
detect ethylene gas dynamics of apple cultivar‘Fuji’ in real time” , Sci. Rep. 11, 20695 (2021).

4. Hosobata, T., Yamada, N., L., Hino, M., Yoshinaga, H.,
Nemoto, F., Hori, K., et al.: “Elliptic neutron-focusing
supermirror for illuminating small samples inneutron reflectometry” , Optics Express Vol. 27, Issue
19, pp. 26807-26820 (2019),
https://doi.org/10.1364/OE.27.026807▲

Member(a) Sodium LIDAR(b) Coherent Lyman-α resonance radiation source for ultra-slow muon generation(c) Laser inspection of infrastructure by courtesy of Shizuoka Pref. and Topcon Corp.
(d) Application of photonics control technology to plant cultivation

Ultrahigh precision machining and metrology of silicon crystal for pendellӧsung interferometry

5. Notake, T., Takeda, M., Okada, S., Hosobata, T.,
Yamagata, Y., and Minamide, H.:“Characterization of all second-ordernonlinear-optical coefficients of organic
N-benzyl-2-methyl-4-nitroaniline crystal” ,Scientific Reports 9(1) (2019), DOI:
10.1038/s41598-019-50951-1▲

Norihito Saito / Kiwamu Kase /Tomoki Matsuyama / Takafumi Sassa /Takayo Ogawa / Masaki Yumoto / Katsushi Fujii /Kentaro Miyata / Masayuki Maruyama /Takeharu Murakami / Masato Otagiri /Yoshito Ishiki / Michio Sakashita /Katsuhiko Tsuno / Kei Taneishi / Kei Morishita /Yasushi Kawata / Toshihiro Okashita / Yoko Ono /Takeshi Matsumoto

Keywords

Ultrahigh Precision Machining,
Ultrahigh Precision Metrology, Aspherical Optics,
Production Technology, Neutron Optics▲

Our team investigates new optical technologies for solving world-wide environmental

Particle control and measurement, Medical andagricultural measurement, Trace gas measurement,
Natural energy, Space applications

FieldsEngineering,Interdisciplinary science and engineering▲▲

Keywords▲▲

FieldsMemberKoichiro Shirota / Yusuke Tajima /Yoshiyuki Takizawa / Tetsuya Aoyama /Noboru Ebizuka / Hiroyoshi Aoki /Takuya Hosobata / Satoru Egawa /Masahiro Takeda

1819Advanced Photonics Technology Development Group

Neutron Beam Technology Team
Team Leader

Yoshie Otake

1. Kobayashi, T., Ikeda, S., Otake, Y., Ikeda, Y., andHayashizaki, N.: “Completion of a new accelerator-driven
compact neutron source prototype RANS-II for on-siteuse” , NUCL INSTRUM METH PHYS RES A Vol.994,
165091 pp1-6 (2021).
2. 藤田訓裕，岩本ちひろ，高梨宇宙，大竹淑恵，野田秀作.:“散乱中性子イメージング法を用いた道路橋床版の滞水・土砂化検知システム” , 日本材料学会第21回コンクリート
構造物の補修，補強，アップグレードシンポジウム論文
集.Vol. 21, pp484-489 (2021).
3. Otake, Y.: “RIKEN Accelerator-driven compact Neutron
systems, RANS project -RANS, RANS-II, III, RANS-μ-” J.
Neutron Res. vol. 23, no. 2-3, pp119-125 (2021).

Research and development of compact neutron systemfor practical use at anytime, anywhere
RIKEN has developed accelerator-driven compact pulse neutron systems for practical

It is inevitably required to devise and/or maintain variety of advanced research

use in industrial applications and non-destructive infrastructure inspection. They are

instruments and equipments to promote and support laboratories for wide ranges ofcalled RIKEN accelerator-driven compact neutron source RANS and RANS-II. RANS has

research fields from fundamental to practical phases. The main duty of our team is to

succeeded to develop non-destructive inspection methods with slow and fast neutrons.

develop those instruments required by researchers, and also this duty should be

One is the visualization method of the corrosion and its related water movement ofconducted consequently from concept design to manufacture through detailed design

painted steels and the analytical method of the quantitative estimation of the waterand instrumentation. Our team also deals with improvement and maintenance of working

movement in the painted steels, the other is the neutron engineering diffractometer for

scientific experimental equipments. For these purposes, we are constantly making efforts

1. Heacock, B., Fujiie, T., Haun, W.R.,.Henins, A.,
Hirota, K., Hosobata, T., Huber, M.G., Kitaguchi, M.,
Pushin, D.A., Shimizu, H., Takeda, M., Valdillez, R.,
Yamagata, Y., and Young, A.R.:"Pendellosunginterferometry probes the neutron charge radius,
lattice dynamics, and fifth forces", Science 373,
1239-1243 (2021).

the texture evaluation and the austenite volume fraction estimation of iron and steel.

to improve our design, manufacturing and engineering capabilities for rapid services.

The others are the fast neutron imaging applications. Novel scattered neutron imaging

Engineering,Interdisciplinary science and engineering

Keywords

Production technology, Mechanical machining,
Laser machining, CAD/CAM/CAE, 3D printerPublications

2. Teshima, Y., Hosoya, Y., Sakai, K., Nakano, T., Tanaka, A.,
Aomatsu, T., Yamazawa, k., Ikegami, Y., and Watanabe,
Y.: “Development of Tactile Globe by Additive
Manufacturing” , Springer LNCS 12376, 419-426 (2020).
3. Yamazawa, K., Teshima, Y., Watanabe, Y., Ikegami,Y., Fujiyoshi, M., Oouchi, S., and Kaneko, T.:“Three-Dimensional Model Fabricated by Layered
Manufacturing for Visually Handicapped Persons
to Trace Heart Shape” , Springer LNCS 7383,
505-508 (2012).

method to see through the fracture in the concrete slab has been successfully
developed. The compact neutron systems are expected to be widely used on-site.

4. Wakabayashi, Y., Yan, M., Takamura, M., Ooishi, R., Watase, H.,
Ikeda, Y., and Otake, Y.: “Conceptual study of salt-meter with
252Cf neutron source for on-site inspection of bridge
structure” , J. Neutron Res. vol. 23, no. 2-3, pp207-213 (2021).

4. Oouchi, S., Yamazawa, K., and Secchi, L.: “Reproductionof Tactile Paintings for Visual Impairments Utilized
Three-Dimensional Modeling System and the Effect ofDifference in the Painting Size on Tactile Perception” ,Springer LNCS 6180, 527-533 (2010).

5. Xu, P.G., Ikeda, Y., Hakoyama, T., Takamura, M., Otake, Y.,
and Suzuki, H.: “In-house texture measurement using acompact neutron source” , J Appl Crystallogr Vol.53,
pp444-454 (2020).

▲

5. Yamazawa, K., Hashizume, D., Nakao, A., Anzai, M.,
Narahara, H., and Suzuki, H.: “Proposal for Artificial
Bone Formation using Powder-layered
Manufacturing: Surface and Internal ChemicalComposition of Formed Artificial Bone” ,Transactions of the Japanese Society for Medical
and Biological Engineering Vol.47 No. 4, 359-365(2009).

Member▲Atsushi Taketani / Masato Takamura /Tomohiro Kobayashi / Yasuo Wakabayashi /Maki Mizuta / Takaoki Takanashi / Kunihiro Fujita /Chihiro Iwamoto / Mingfei Yan / Shota Ikeda /Makoto Goto

MemberKenji Yamazawa / Shigeru Ikeda /Takeshi Fujimoto / Masahiro Takeda /Masaharu Watanuki / Ichiro Takahashi /The future imaging of compact neutron non-destructive test system on-site

20

FieldsExample of manufactured partsfor scientific apparatus and number of requests▲▲

Publications

D.Eng.

▲▲

Keywords

Yutaka Yamagata▲▲

Fields

Accelerator-based compact neutron system,
Characterization of microstructure and texture
evaluation in steels, Research and development of
non-destructive inspection for infrastructures,
Visualization of water and air hole in concrete slabs,
Detection of salt damage in the concrete byprompt-gamma neutron activation analysis

Advanced Manufacturing Support Team
Team Leader

D.Sci.

Physics, Engineering,Interdisciplinary science and engineering

Advanced Photonics Technology Development Group

Examples of manufactured components forscientific apparatuses and number of requests in FY2021

Susumu Shimoda

21