bluuebunny/crossref_metadata_2025 huggingface dataset:
Classical shadows and Bayesian mean estimation: a comparison
Authors: Lukens Joseph M. , Law Kody J. H. , Bennink Ryan S.
Published: August 2021

Classical shadows enable remarkably efficient estimation of quantum observables, yet their connection to conventional techniques is unclear. In simulated examples we show that Bayesian mean estimation attains lower error on average, whereas classical shadows excel for specific states of interest.
Robust self-testing on photonic quantum networks
Authors: Agresti Iris , Polacchi Beatrice , Poderini Davide , Polino Emanuele , Suprano Alessia , Šupić Ivan , Bowles Joseph , Carvacho Gonzalo , Cavalcanti Daniel , Sciarrino Fabio
Published: August 2021

In this work, we experimentally self-test the states generated by two quantum network basic topologies. In detail, we provide lower bounds on their fidelity with respect to a target, through a scalable and versatile protocol.
A Belief Propagation-based Quantum Joint-Detection Receiver for Superadditive Optical Communications
Authors: Rengaswamy Narayanan , Seshadreesan Kaushik P. , Guha Saikat , Pfister Henry
Published: August 2021

We design a quantum joint-detection receiver for binary-phase-shift-keyed optical communications using belief propagation with quantum messages. For an exemplary tree code, the receiver attains the block-Helstrom limit in discriminating the codewords and achieves superadditive capacity.
EIT Cooling of Atoms in Optical Dipole Traps
Authors: Hwang Hansub , Byun Andrew , Ahn Jaewook
Published: August 2021

Neutral atoms trapped in an array of optical dipole traps are EIT-cooled to a temperature of T
f
= 2.8 μK. With an observed EIT cooling rate of 1400 /s for theory limt of n∞ = 0.03, we measure the average quanta of n = 1.5.
Optical Density Variations Induced by an Optical Vortex
Authors: Acevedo Cristian Hernando , Wu Ruitao , Miller Jerome , Johnson Eric , Dogariu Aristide
Published: August 2021

We demonstrate the steady-state reduction of optical density along the path of vortex beams. The adjustable properties of the external field control the temporal and spatial scales of this radial transport of mass.
Enhancement of Spontaneous Parametric Down-Conversion in Nonlinear Metasurfaces
Authors: Fedotova Anna , Santiago-Cruz Tomás , Sultanov Vitaliy , Weissflog Maximilian , Younesi Mohammadreza , Staude Isabelle , Pertsch Thomas , Setzpfandt Frank , Chekhova Maria V.
Published: August 2021

We experimentally demonstrate biphoton generation by spontaneous paramet-ric down-conversion in resonant metasurfaces. In our metasurfaces, Mie-type resonances enable over 7 times more efficient biphoton generation compared to an unstructured thin film.
Nonlinear metasurfaces with asymmetric light generation
Authors: Kruk Sergey , Wang Lei , Sain Basudeb , Dong Zhaogang , Yang Joel , Zentgraf Thomas , Kivshar Yuri
Published: August 2021

We demonstrate a novel class of metadevices with asymmetric nonlinear response. We fabricate translucent metasurfaces that generate completely independent images in transmission for the opposite directions of illumination at the third-harmonic frequency.
Optical control of X-ray emission
Authors: Sendonaris Elina , Sloan Jamison , Rivera Nicholas , Soljacic Marin
Published: August 2021

We theoretically show that photonic structures can be used to control the X-ray spectrum generated through spontaneous parametric down-conversion. As an example, we show how 1D and 3D photonic crystals can enable enhanced X-ray emission.
Single photon generation in a topological slow light waveguide
Authors: Kuruma Kazuhiro , Yoshimi Hironobu , Ota Yasutomo , Katsumi Ryota , Kakuda Masahiro , Lončar Marko , Arakawa Yasuhiko , Iwamoto Satoshi
Published: August 2021

We report a topologically-protected single photon source in a slow light waveguide based on valley photonic crystals. Purcell-enhanced single photon generation from a quantum dot and its robust propagation in the topological waveguide are demonstrated.
Narrow-linewidth tin-vacancy centers in diamond waveguides
Authors: Rugar Alison E. , Aghaeimeibodi Shahriar , Dory Constantin , Lu Haiyu , McQuade Patrick J. , Mishra Sattwik Deb , Sun Shuo , Shen Zhi-Xun , Melosh Nicholas A. , Vučković Jelena
Published: August 2021

We have fabricated waveguides containing tin-vacancy centers in diamond, promising optically accessible spin qubit candidates. The tin-vacancy centers in waveguides display narrow linewidths of ~ 36 MHz.
Room-temperature Single-photon Emitters in Silicon Nitride
Authors: Senichev Alexander , Peana Samuel , Martin Zachariah O. , Sychev Demid , Xu Xiaohui , Kudyshev Zhaxylyk , Lagutchev Alexei S. , Boltasseva Alexandra , Shalaev Vladimir M.
Published: August 2021

We report the discovery of room-temperature quantum emitters in silicon nitride. Photophysical analysis reveals bright (>105 counts/s), stable, and pure single-photon emission with an average of g(2)(0) of about 0.25 collected from a hundred emitters.
Plasmonic diatomic metasurfaces for full-Stokes polarization perfect absorption
Authors: Liang Yao , Lin Han , Koshelev Kirill , Zhang Fengchun , Yang Yunyi , Wu Jiayang , Kivshar Yuri , Jia Baohua
Published: August 2021

We demonstrate experimentally perfect absorbers for arbitrary polarization (linear, circular, or elliptical) in the mid-IR based on plasmonic diatomic metasurfaces, which provide perfect absorption for any specific polarization and almost total reflection for the orthogonal polarization.
Bianisotropic Characterization of Mestasurfaces with Plasmon-Enhanced Nonlinearity
Authors: Yesilyurt Omer , Prokopeva Ludmila J. , Kildishev Alexander V.
Published: August 2021

Bianisotropic characterization of plasmon-enhanced Kerr-nonlinearity is developed. An equivalent homogeneous film with effective nonlinear parameters (n2 and α) can be employed to substitute for the plasmonic metasurface with enhanced nonlinearity and reduce simulation complexity.
Topological bulk laser in kagome lattice
Authors: Wong Stephan , Oh Sang Soon
Published: August 2021

By introducing an imaginary gauge field, we demonstratet opologically pro-tected bulk modes extended over a two-dimensional kagome lattice with rhombus geometry. Using the kagome lattice with gain/loss, a phase-locked broad-area topological laser can be realized.
Evolution of nonthermal electrons in pump-probe electron relaxation dynamics
Authors: Na Meng Xing , Boschini Fabio , Mills Arthur K. , Michiardi Matteo , Day Ryan P. , Zwartsenberg Berend , Levy Giorgio , Zhdanovich Sergey , Kemper Alexander F. , Jones David J. , Damascelli Andrea
Published: August 2021

We study the relaxation of photoexcited electrons in graphite using TR-ARPES. Observed nonthermal electron distributions are modelled using Boltzmann rate-equations, leading to the identification of nonthermal phases in the fluence-delay phase space with broad implications.
Ultrashort green laser pulse amplification in praseodymium doped LiYF4 crystal pumped by InGaN based laser diodes
Authors: Yada Hiroyuki , Ichikawa Yuki
Published: August 2021

A green laser pulse (peak wavelength of 522.4 nm) was amplified as 12.5 times from 0.1 to 1.25 μJ in a regenerative amplifier using a Pr3+:LiYF4 crystal pumped by InGaN based laser diodes.
Terahertz Generation in Thin-film Lithium Niobate Platform
Authors: Herter A. , Shams-Ansari A. , Settembrini F. F. , Warner H. , Faist J. , Loncar M. , Benea-Chelmus I.-C.
Published: August 2021

We demonstrate spectrally and temporally tailored terahertz radiation from optical rectification of 100 pJ femtosecond pulses in low-loss thin-film lithium niobate waveguides that are co-integrated with terahertz antennas. A maximal emission frequency of 440 GHz is achieved.
Narrow Linewidth, Widely Tunable Integrated Lasers from Visible to Near-IR
Authors: Corato-Zanarella Mateus , Gil-Molina Andres , Shin Min Chul , Ji Xingchen , Mohanty Aseema , Lipson Michal
Published: August 2021

We demonstrate a chip-scale platform for narrow-linewidth lasers, tunable across the whole spectrum from blue to near-IR. We show powers up to 10mW, intrinsic linewidth <8kHz, tuning up to 12nm and SMSRs up to 38dB.
High-Throughput, Multimode Spectroscopy Using Cross-Dispersive Serpentine Integrated Grating Arrays
Authors: Dostart Nathan , Brand Michael , Zhang Bohan , Popović Miloš , Wagner Kelvin
Published: August 2021

We demonstrate a high-resolution, crossed-dispersion integrated photonic spectrometer capable of high-etendue, multimode operation. The first experimental single-mode design achieves record performance per volume with 1.5 GHz resolution and 13 THz band-width in a 0.5 mm2 footprint.
Integrated thin-film lithium niobate non-reciprocal circulator
Authors: Herrmann Jason F. , Ansari Vahid , Wang Jiahui , Witmer Jeremy D. , Fan Shanhui , Safavi-Naeini Amir H.
Published: August 2021

We demonstrate an integrated electro-optic frequency circulator on thin-film lithium niobate. Our device operates at telecommunications wavelengths, exhibiting fre-quency conversion and isolation of 37.3 dB, with insertion loss of 3.8 dB.
100 dB/cm broadband optical parametric amplification in dispersion engineered nanophotonic lithium niobate waveguides
Authors: Ledezma Luis , Sekine Ryoto , Guo Qiushi , Nehra Rajveer , Jahani Saman , Marandi Alireza
Published: August 2021

We demonstrate phase-sensitive amplification and confirm aga in exceeding 100 dB/cm on a dispersion-engineered thin-film lithium niobate waveguide, using less than 20 pJ of pump energy, and exhibiting a gain bandwidth larger than 600 nm around 2.09 μm.
Simultaneous Second and Third Harmonic Generation in Gallium Phosphide Microdisk Resonators
Authors: McLaughlin Blaine , Lake David P. , Mitchell Matthew , Barclay Paul E.
Published: August 2021

Gallium phosphide is a nonlinear crystal of growing importance for integrated photonics. We observe and characterize a simultaneous second harmonic generation and third harmonic generation in a gallium phosphide microdisk for the first time.
Ultra-broadband and Low-loss 16 × 16 SiPh Switch
Authors: Das Alok , Zhang Guowu , Liboiron-Ladouceur Odile
Published: August 2021

A 16×16 SiPh thermo-optic switch provides 100 nm of bandwidth, at most 8 dB in crosstalk, and 3.8 dB loss for the longest path. At 10 Gb/s, this energy-efficient switch consumes less than 7 pJ/bit.
Ultra-broadband Nanophotonics via Adaptive Inverse Design
Authors: Zhu Ziwei , Dave Utsav D. , Lipson Michal , Zheng Changxi
Published: August 2021

We present an inverse design method for achieving unprecedented performance and ultra wide bandwidth based on direct adaptive refinement of the device geometry. We experimentally demonstrate a 90/10 splitter with more than 200 nm bandwidth.
Inverse Design of Visible Integrated Photonics for an Ultracold Strontium Optical Clock
Authors: Spektor G. , Carlson D. , Newman Z. , Skarda J.L. , Sapra N. , Su L. , Tso Y.M. , Jammi S. , Ferdinand A. , Lunden W. , Boyd M. , Srinivasan K. , Ropp C. , Agrawal A. , Aksyuk V. , Vučković J. , Papp S. B.
Published: August 2021

We demonstrate visible integrated photonics, using an inverse-design approach. Tantalum-pentoxide nanophotonics offers <2 dB/cm waveguide loss across 450-2000 nm range. We create a suite of passives, including arbitrary-polarization grating sources for a Sr optical clock.
Ultra-low-loss photonic circuits with integrated quantum dot single-photon sources
Authors: Laroque Hugo , Moreira Renan , Guha Biswarup , Chanana Ashish , Song Jin Dong , Carolan Jacques , Englund Dirk , Blumenthal Daniel J. , Srinivasan Kartik , Davanco Marcelo
Published: August 2021

We demonstrate hybrid quantum photonic circuits comprising Si3N4 waveguides featuring losses in the dB/m range, with directly integrated quantum dot based single-photon sources.
Experimental Demonstration of Bandwidth-Efficient and Low-Complexity Mobile Fronthaul Transmissions Utilizing Digital Orthogonal Filtering-Enabled Channel Aggregation
Authors: Deng M.L. , Mamadou T. , Zhang Q. W. , Xing Z. B. , Luo Z. R. , Wang L.
Published: August 2021

We experimentally demonstrate bandwidth-efficient and low-complexity mobile fronthaul transmissions, where 24 20MHz LTE signals are aggregated via digital orthogonal filtering, achieving an average EVM of 2.8% and 31dB loss budget for a 6km SSMF link.
Comb injection into a single-mode laser
Authors: Auth Dominik , Lautenschläger Jan , Weber Christoph , Kazakov Dmitry , Piccardo Marco , Klehr Andreas , Knigge Andrea , Hillbrand Johannes , Schwarz Benedikt , Capasso Federico , Breuer Stefan
Published: August 2021

Temporally- and spectrally-resolved phase and intensity emission characteri-zation of amplitude-modulated optical frequency comb generation and phase noise transfer of an initially single mode laser by optical comb injection locking is presented.
Ultra-stable 25.5 GHz quantum dot mode-locked frequency comb operating up to 120 °C
Authors: Pan Shujie , Huang Jianou , Zhou Zichuan , Liu Zhixin , Ponnampalam Lalitha , Liu Zizhuo , Tang Mingchu , Lo Mu-Chieh , Cao Zizheng , Seeds Alwyn , Liu Huiyun , Chen Siming
Published: August 2021

We report a frequency comb source based on a quantum dot mode-locked laser that generates a frequency comb with a stable 25.5 GHz mode spacing over an ultra-broad temperature range of 20 °C - 120 °C.
Approaching 200 fs, using dispersion engineering, in passively mode-locked Bragg waveguide laser structures
Authors: Janjua B. , Iu M. I. , Yan Z. , Charles P. , Chen E. , Helmy Amr S.
Published: August 2021

We demonstrate a passively mode-locked semiconductor Bragg waveguide laser which exhibit pulse widths down to 211 fs at 64 GHz. The dispersion of Bragg waveguides enables this new record, especially for emission around 785 nm.
Exploring New Ultrafast Operation Regimes in Quantum Dot Lasers and Amplifiers
Authors: Cataluna Maria Ana , Forrest Adam , Ribeiro Ana Filipa , White Stephanie , Krakowski Michel , Bardella Paolo
Published: August 2021

We will present our recent results, harnessing the flexibility of quantum dot materials towards the development of increasingly versatile regimes of ultrashort pulse generation and amplification in edge-emitting devices.
69 W average power sub-100-fs Yb:YAG thin-disk laser
Authors: Fischer Julian , Drs Jakub , Modsching Norbert , Labaye François , Wittwer Valentin J. , Südmeyer Thomas
Published: August 2021

Operating in a regime of strong self-phase-modulation, 84-fs pulses are generated with 42-MW peak power and 12% efficiency from Yb:YAG. We demonstrate a 3x higher average power than any previous sub-100-fs laser oscillator.
Yb-doped laser oscillator generating 22-fs pulses at 0.73 W
Authors: Labaye François , Wittwer Valentin J. , Hamrouni Marin , Modsching Norbert , Cormier Eric , Südmeyer Thomas
Published: August 2021

A novel pumping approach for Yb-doped gain materials enables a Kerr-lens mode-locked Yb-CALGO laser to overcome previous bandwidth limitations and to generate 22-fs pulses with an average power of 729 mW and 25% optical-to-optical efficiency.
Octave-spanning polycrystalline Cr:ZnS laser
Authors: Vasilyev S. , Moskalev I. , Smolski V. , Peppers J. , Mirov M. , Barnakov Y. , Fedorov V. , Martyshkin D. , Mirov S. , Gapontsev V.
Published: August 2021

We report the first femtosecond polycrystalline Cr:ZnS oscillator with an octave-spanning spectrum. Average power of the laser is 1.4 W at the mid-IR central wavelength 2.4 μm and the pulse repetition frequency 79 MHz.
The All Diode Pumped, Yb3+ Based, 10 J, 10 Hz, Sub-picosecond CPA Laser of the Petawatt-Field-Synthesizer
Authors: Krüger Mathias , Münzer Andreas , Kessel Alexander , Leshchenko Vyacheslav E. , Krausz Ferenc , Karsch Stefan
Published: August 2021

We present the laboratory performance and key technologies of the all diode pumped, Yb
3+
based, 10 J, 10 Hz, sub-picosecond CPA laser chain that was developed to pump the picosecond OPCPA stages of the Petawatt-Field-Synthesizer.
Towards milli-Hertz laser frequency noise on a chip
Authors: Wang Heming , Wu Lue , Yuan Zhiquan , Vahala Kerry
Published: August 2021

A fundamental frequency noise of 9 mHz·Hz/Hz is demonstrated in an on-chip Brillouin laser. The noise measurement uses the frequency discrimination method enhanced by cross-correlator. The results set new performance targets for chip-based laser platforms.
11× temporal compression in an ultra-silicon-rich nitride chip
Authors: Choi Ju Won , Sahin Ezgi , Sohn Byoung-Uk , Chen George F. R. , Ng Doris K. T. , Agarwal Anuradha M. , Kimerling Lionel C. , Tan Dawn T. H.
Published: August 2021

Strong temporal compression in an integrated ultra-silicon-rich nitride temporal compressor consisting of separate nonlinear and anomalously dispersive stages is demonstrated. 11× compression of 5.8ps pulses at a low input peak power of 13.3W and 9.4× increase in the pulse peak power is achieved.
Optical parametric amplification in silicon nitride waveguides for coherent Raman imaging
Authors: Lupken Niklas M. , Wurthwein Thomas , Boiler Klaus-J. , Fallnich Carsten
Published: August 2021

Waveguide-based optical parametric amplification by stimulated four-wave mixing in silicon nitride waveguides is presented. The high nonlinearity leads to reduced necessary pump energies and waveguide length. The light source was applied for narrow-band Raman imaging.
Enhanced Kerr nonlinear performance in graphene oxide-coated silicon and silicon nitride waveguides
Authors: Zhang Yuning , Wu Jiayang , Yang Yunyi , Qu Yang , Jia Linnan , Liang Yao , Dirani Houssein El , Crochemore Romain , Demongodinc Pierre , Sciancalepore Corrado , Grillet Christian , Monat Christelle , Jia Baohua , Moss David J.
Published: August 2021

Graphene oxide films are integrated with silicon and silicon nitride waveguides to demonstrate enhanced Kerr nonlinearity. Self-phase modulation with a broadening factor of 4.34 and four-wave mixing with ~9.1 dB conversion efficiency improvement are achieved.
Brillouin laser stabilization to a single ion
Authors: Loh William , Stuart Jules M. , Reens David , Bruzewicz Colin D. , Braje Danielle , Chiaverini John , Juodawlkis Paul W. , Sage Jeremy M. , McConnell Robert
Published: August 2021

We stabilize a 20-Hz linewidth fiber-cavity stimulated Brillouin scattering (SBS) laser to an Sr+ ion in the demonstration of an optical atomic clock.
III-V-on-Silicon-Nitride Mode-Locked Laser with 2 pJ On-Chip Pulse Energy
Authors: Hermans Artur , Van Gasse Kasper , Kjellman Jon Ø. , Caër Charles , Nakamura Tasuku , Inada Yasuhisa , Hisada Kazuya , Hirasawa Taku , Kumari Sulakshna , Marinins Aleksandrs , Jansen Roelof , Roelkens Günther , Soussan Philippe , Rottenberg Xavier , Kuyken Bart
Published: August 2021

We demonstrate a III-V-on-silicon-nitride electrically pumped mode-locked laser emitting at λ = 1.6 μm with an on-chip pulse energy of approximately 2 pJ, significantly higher than on III-V-on-Si and InP photonic integration platforms.
Highly efficient photon pair generation in AlGaAs-on-insulator waveguides
Authors: Mahmudlu Hatam , May Stuart , Angulo Alí , Sorel Marc , Kues Michael
Published: August 2021

We demonstrate the generation of correlated photon pairs in AlGaAs-on-insulator waveguides through spontaneous four-wave mixing at telecom wavelengths with a generation efficiency of ~0.096 × 1012 pairs/(s∙2), one of the highest achieved in integrated structures.
All-optical wideband chaos synchronization and communications based on mutual injection of semiconductor lasers
Authors: Xiang Shunkai , Yang Min , Wang Jian
Published: August 2021

We experimentally demonstrate all-optical wideband chaos synchronization and communications based on mutual injection of semiconductor lasers. The 10-Gbaud quadrature phase shift keying signals are successfully encrypted and transmitted.
Optical-Optical Double-Resonance Spectroscopy of Methane Using a Cavity-Enhanced Comb Probe
Authors: de Oliveira Vinicius Silva , Silander Isak , Rutkowski Lucile , Soboń Grzegorz , Axner Ove , Lehmann Kevin K. , Foltynowicz Aleksandra
Published: August 2021

We implement a cavity to enhance the absorption of a frequency comb probe in a double-resonance measurement of sub-Doppler 3ν3 ← ν3 methane transitions. This yields two orders of magnitude better sensitivity in 15 times shorter acquisition time compared to previous work using a single-pass cell. © 2021 The Authors OCIS codes: 300.1030, 300.6190, 300.6320, 300.6390.
Precision Measurements of 14N 162O Using a Comb-Based Fourier Transform Spectrometer at 7.8 µm
Authors: Hjältén Adrian , Germann Matthias , Krzempek Karol , Hudzikowski Arkadiusz , Głuszek Aleksander , Tomaszewska Dorota , Soboń Grzegorz , Foltynowicz Aleksandra
Published: August 2021

Using a compact fiber-based difference frequency generation comb and a Fourier transform spectrometer we record spectra of the N2O ν1 band at 1285 cm-1 in the Doppler limit. Fitting Gaussian line shapes to the individual absorption lines yields center frequencies with <200 kHz average precision.
Record Schottky detector sensitiviy using hybrid plasmonic supermode hybridization
Authors: Lin Charles , Chang Po-Han , Helmy Amr S.
Published: August 2021

A supermode hybridization-based light-matter-interaction enhancement mechanism is experimentally demonstrated, enabling broadband and athermal amorphous Schottky detectors with record responsivity per volume and sensitivity (-55dBm) approaching crystalline Ge counterparts that are 36× larger.
Plasmonic Directional Photodetectors for Edge Enhancement
Authors: Liu Jianing , Wang Hao , Kogos Leonard C. , Li Yunzhe , Li Yuyu , Tian Lei , Paiella Roberto
Published: August 2021

Angle-sensitive plasmonic photodetectors that can perform optical-domain spatial filtering operations are developed. The edge enhancement capabilities of these devices are demonstrated via computational imaging simulations based on their measured angular response.
Non-Invasive Neutral Atom Density Measurements using fs-TALIF in a Magnetic Linear Plasma Device
Authors: Dogariu Arthur , Evans Eugene , Vinoth Sangeeta P. , Cohen Samuel A.
Published: August 2021

We report on femtosecond TALIF measurements of neutral density in a mirror plasma device. We have measured H density down to 1011 cm-3, and the dynamics of the H neutrals in quasi-CW and pulsed plasma.
Simultaneous measurement of optical spectroscopic signatures from ultrafast laser-produced plasmas
Authors: Harilal Sivanandan S. , Kautz Elizabeth J. , Jones R. Jason , Phillips Mark C.
Published: August 2021

We performed simultaneous measurement of absorption, emission, and laser-induced fluorescence spectroscopic signatures for determining femtosecond laser-produced plasma’s physical properties throughout its lifecycle.
Ultrafast Parallel LiDAR with All-optical Spectro-temporal Encoding
Authors: Zang Zihan , Li Zhi , Luo Yi , Han Yanjun , Liu Xuanyi , Wu Lican , Fu H.Y.
Published: August 2021

The speed of a single-pixel LiDAR is limited by the round-trip delay and the speed of beam steering. We exploit optical code division multiplexing and inertia-free spectral scanning to break the speed limit.
Toward OAM-selective frequency conversion in a three-mode fiber
Authors: Shamsshooli Afshin , Guo Cheng , Parmigiani Francesca , Li Xiaoying , Vasilyev Michael
Published: August 2021

We describe OAM-compatible mode-selective frequency conversion in a few-mode fiber and experimentally demonstrate downconversion of various superpositions of signal modes LP11a and LP11b to the same LP11b mode with conversion efficiency differences <0.8 dB.
Dual-comb digital holography with high spectral resolution
Authors: Vicentini Edoardo , Wang Zhenhai , van Gasse Kasper , Hänsch Theodor W. , Picqué Nathalie
Published: August 2021

The many evenly-spaced lines of a frequency comb are harnessed for a new approach digital holography, using dual-comb interferometry. A “movie” of recorded holograms enables 3- dimensional hyperspectral imaging with high spatial and spectral resolution.
Ultra-Precise Complex Refractive Index Measurement Using Dual-Comb Spectroscopy
Authors: Sumihara Kana A. , Okubo Sho , Okano Makoto , Inaba Hajime , Watanabe Shinichi
Published: August 2021

We determined complex refractive index and thickness of a silicon wafer with unprecedented precision using dual-comb spectroscopy. The standard deviations of the refractive index and the thickness are 8.9×10-6 and 1.0 nm, respectively.
LWIR Dual-Comb Spectroscopy Using Time-Domain Etalon Calibration
Authors: Rhoades Ryan T. , Lecaplain Caroline , Phillips Mark C. , Jones R. Jason
Published: August 2021

We demonstrate a technique for improving performance in dual-comb spectroscopy when utilizing sources based on difference frequency generation without stabilization of the offset frequency by utilizing an etalon to recalibrate time-domain data in post-processing.
III-V-on-Silicon 1-GHz Mode-Locked Lasers Towards Frequency-Comb Applications
Authors: Van Gasse Kasper , Wang Zhechao , Roelkens Gunther , Hänsch Theodor W. , Kuyken Bart , Picqué Nathalie
Published: August 2021

Fundamental and technical noise sources in III-V-on-silicon mode-locked lasers are investigated and minimized. Their frequency stability is optimized to make them suited to applications such as dual-comb spectroscopy or dual-comb LIDAR.
Electrically Injected GeSn Laser on Si Operating up to 110K
Authors: Amoah Sylvester , Ojo Solomon , Tran Huong , Abernathy Grey , Zhou Yiyin , Du Wei , Margetis Joe , Tolle John , Li Baohua , Yu Shui-Qing
Published: August 2021

We demonstrated electrically injected GeSn laser with the threshold to as low as 353 A/cm2 at 10 K. The threshold reduction was achieved by introducing a thicker SiGeSn cap, eliminating the optical loss from the top metal contact. The peak power was measured as 2.75 mW/facet at 10 K. At 110 K, the emission peak is at 2604 nm.
Understanding Nonlinear Phononic Processes with Two- Dimensional Spectroscopy
Authors: Nielson Megan F. , Knighton Brittany E. , Davis Lauren , Alejandro Aldair , Nelson Emma , Johnson Jeremy A.
Published: August 2021

Two-dimensional (2D) THz spectroscopy can reveal information about nonlinear energy transfer in solids. Experimental power dependent measurements can help determine the order of nonlinear mechanism. We used first-principles calculations to calculate anharmonic coupling constants for vibrational modes in beta-barium borate and compared with the recorded nonlinear 2D spectrum.
Custom Terahertz Pulses for Nonlinear Vibrational Excitation
Authors: Rader Claire , Knighton Brittany E. , Zaccardi Zachary B. , Michaelis David J. , Johnson Jeremy A.
Published: August 2021

We combine THz pulses from two complimentary crystals to increase peak field strength and create a broad, smooth spectrum. We show the utility of using this strong THz pulse to nonlinearly excite vibrations in solids.
Time-resolved 2D THz-Spectroscopy on a THz quantum cascade structure
Authors: Markmann Sergej , Franckié Martin , Pal Shovon , Stark David , Beck Mattias , Fiebig Manfred , Scalari Giacomo , Faist Jérôme
Published: August 2021

We have performed two-dimensional THz spectroscopy on an unbiased quan- tum cascade structure (QCS), and observe multiple nonlinear pump-probe signals origi- nating from the engineered intersubband system. Moreover, we provide experimental and simulation evidence for coherent population transport.
Compact, low threshold methyl fluoride terahertz laser pumped by a quantum cascade laser
Authors: Chevalier Paul , Amirzhan Arman , Rowlette Jeremy , Stinson Ted , Pushkarsky Michael , Day Timothy , Everitt Henry O. , Capasso Federico
Published: August 2021

We demonstrate a quantum cascade laser-pumped terahertz laser using methyl fluoride gas. The large dipole moment of this molecule allows for a low threshold laser with frequency tunable emission spanning more than one terahertz.
Y-coupled THz Quantum Cascade Laser Frequency Comb
Authors: Senica Urban , Olariu Tudor , Micheletti Paolo , Beck Mattias , Faist Jérôme , Scalari Giacomo
Published: August 2021

We present a planarized Y-coupled THz quantum cascade laser operating as a frequency comb. Broadband phase locking is maintained between the two arms through the whole operating range, as confirmed by far-field measurements.
In-fiber Polarization Control Using Nematic Liquid Crystal in Nano-Capillary Bragg Grating Array
Authors: Rahnama Abdullah , Dadalyan Tigran , Aghdami Keivan Mahmoud , Galstian Tigran , Herman Peter R.
Published: August 2021

Nematic liquid crystal was introduced into a nano-hole array grating formed by femtosecond laser filaments in a telecommunication fiber. Capillary alignment has resulted in a strong polarization extinction ratio within a broad Bragg resonance.
Exceptionally high coupling of light into optical fibers via all-dielectric nanostructures
Authors: Yermakov Oleh , Schneidewind Henrik , Hübner Uwe , Wieduwilt Torsten , Zeisberger Matthias , Bogdanov Andrey , Kivshar Yuri , Schmidt Markus A.
Published: August 2021

We demonstrate experimentally and in simulation record-high efficiencies for coupling of light into step-index fibers a t a lmost g razing i ncidence v ia t he i nclusion of axial-symmetric dielectric nanostructures, realized by electron-beam-lithography, onto the fiber facet.
Demonstration of Ring-Core Fiber Coupling System for Tailored Optical Vortex Beams Assisted by Diffraction Neural Networks
Authors: Liang Yize , Hu Xuanyu , Zhao Zhe , Zhang Xi , Wang Jian
Published: August 2021

We propose and experimentally demonstrate a visualized ring-core fiber coupling alignment system. A two-layer fully connected diffraction neural network is used to tailor the input optical vortex beam for accurate size match.
Bright Quantum Dot Single-Photon Source at 1.55 μm Heterogeneously Integrated on Si
Authors: Holewa Paweł , Sakanas Aurimas , Gür Ugur Meriç , Mrowiński Paweł , Gregersen Niels , Syperek Marcin , Semenova Elizaveta
Published: August 2021

We demonstrate high single-photon purity from an InAs/InP QD sources on Si operating at 1.55 µm. The single-photon extraction efficiency reaches up to 10% using a simple mesa structure.
Quantum Prescription of Electron Energy Loss Spectroscopy in Crystalline Films
Authors: Echarri A. Rodríguez , Skjølstrup Enok Johannes Haahr , Pedersenand Thomas G. , de Abajo F. Javier García
Published: August 2021

A quantum mechanical model is used to study the electron energy-loss spectroscopy (EELS) of crystalline noble metal films, which shows intrinsic features associated with their crystallographic orientation. Within the random-phase approximation, we employ a 1-D potential across the film that captures the main features of the electronic band structure of different facet orientation, and then accounting for the corresponding electron-spill out and the atomic-plane corrugation. Furthermore, we examine the role of the vertical transitions among quantum well states, which are related to the in-plane effective mass, which is typically used to fit the parabolic electron bands at the Fermi level.
Plasmonic and Dielectric Nanostructures: Distinguishing Size, Material, and Dielectric Environment via Machine Learning
Authors: Pant Aniket , Appavoo Kannatassen
Published: August 2021

We employ machine learning, coupled with linear and nonlinear dimensionality reduction strategies, to distinguish between plasmonic and dielectric optical response of nanostructures and to understand the role of structural parameters and local environment.
OTF Gym: A Set of Reinforcement Learning Environment of Layered Optical Thin Film Inverse Design
Authors: Jiang Anqing , Chen Liangyao , Yoshie Osamu
Published: August 2021

OTF gym is a python library for optical thin film inverse design. This paper focuses on creating a collection of the reinforcement learning environment to achieve a multi-layer optical thin film inverse design. We develop environments based on TMM simulation to solve various op- timization targets(material, thickness, structural) with a single-agent and multi-agent reinforcement learning algorithm. This code is available in Github.
Isotopic Ratio Measurements With Mid-Infrared Electro-Optic Dual-Comb Spectrometer
Authors: Parriaux Alexandre , Hammani Kamal , Millot Guy
Published: August 2021

We present an electro-optic dual-comb spectrometer operating in the mid- infrared for carbon dioxide sensing. Isotopic ratio measurements of 13CO2/12CO2 are per- formed and the results show good agreements with the expectations.
Time-Resolved Multispecies Analysis of a Laser-Induced Plasma using Dual-Comb Spectroscopy
Authors: Weeks Reagan R. D. , Zhang Yu , Lecaplain Caroline , Yeak Jeremy , Harilal Sivanandan S. , Phillips Mark C. , Jones R. Jason
Published: August 2021

A laser-induced plasma plume containing multiple atomic species is probed using dual-comb spectroscopy, and quantitative analysis is performed by fitting modelled absorption spectra to experimental spectra to obtain number densities and excitation temperatures.
Time-Resolved Dynamics for Ultrashort Pulse Damage of Single-Crystal YAG in the Near-Infrared
Authors: Tripepi Michael , Talisa Noah , Chowdhury Enam
Published: August 2021

We investigate time-resolved dynamics of single-shot laser damage on YAG for ∼9fs pulses near ∼760nm and compare to damage thresholds of 264fs pulses at 1025nm. Results are benchmarked against a modified Keldysh photoionization model.
Sub-100nm Surface Self-organization By Ultrafast Laser Irradiation
Authors: Colombier J.P. , Rudenko A. , Nakhoul A. , Abou-Saleh A. , Maurice C. , Pigeon F. , Garrelie F.
Published: August 2021

Driven by local field enhancements enhancing feedback, novel structuring features demonstrate the potential of ultrafast laser for the fabrication of self-organized patterns with a periodic topography well below the diffraction limit. We report the achievement of laser-induced nanocavities that results from the control of a Marangoni convection instability at the nanoscale.
Structural Coloration from Self-Limiting Films of Self-Assembled Dielectric Mie Scatters
Authors: Fan Jichao , Zhao Liang , Tang Yingheng , Li Bo , Gao Weilu
Published: August 2021

We demonstrate structural coloration from self-limiting films of self-assembled nano to microspheres with accurate layer control. Colors originate from Mie scattering and multilayer structures cover broad colors, which are inferred from structures using neural networks.
Efficiency improvement of InGaN LEDs at elevated temperature with dome-shaped patterned-sapphire substrates
Authors: Chen Meng-Hsin , Kuan Chieh-Hsiung , Su Vin-Cent
Published: August 2021

The efficiency of InGaN LEDs working at elevated temperatures has been improved by introducing patterned-sapphire substrates with dome-shaped nanostructures of the optimized height through the analysis of electroluminescence of devices using an integrating sphere.
Long-Wave-Infrared Integrated Photonics with Germanium-on-Silicon Waveguides
Authors: Kozak Dmitry A. , Tyndall Nathan F. , Pruessner Marcel W. , Rabinovich William S. , Stievater Todd. H.
Published: August 2021

We describe propagation loss, ring resonance, and thermo-optics in germanium-on-silicon (GOS) waveguides throughout the long-wave-infrared. These measurements show the potential of this platform for photonic integration at wavelengths from 7 microns to beyond 11 microns.
Mid-Infrared Supercontinuum Generation in a Pure Germanium-on-Silicon Ridge Waveguide
Authors: Torre Alberto Della , Sinobad Milan , Armand Rémi , Luther-Davies Barry , Ma Pan , Madden Stephen , Moss David J. , Mitchell Arnan , Hartmann Jean-Michel , Reboud Vincent , Fedeli Jean-Marc , Monat Christelle , Grillet Christian
Published: August 2021

We experimentally demonstrate mid-infrared supercontinuum generation (from 3.53 up to 5.83 μm) in a pure germanium on silicon waveguide. We attribute the long wavelength limit of the supercontinuum to free-carrier absorption.
Two-octaves mid-infrared supercontinuum generation in integrated SiGe waveguides
Authors: Montesinos-Ballester M. , Lafforgue C. , Frigerio J. , Ballabio A. , Vakarin V. , Liu Q. , Ramirez J M. , Le Roux X. , Herth E. , Coudevylle J R. , Bouville D. , Barzaghi A. , Alonso-Ramos C. , Vivien L. , Isella G. , Marris-Morini D.
Published: August 2021

Experimental demonstration of on-chip two-octave supercontinuum generation in the mid-infrared wavelength, ranging from 3 to 13 µm (larger than 2500 cm-1), by using graded-index SiGe waveguides that allow dispersion tailoring and low propagation losses.
Guided-Mode Resonance Enhanced Ultra-Thin HOT Mid-Wave Infrared Detectors
Authors: Kamboj A. , Nordin L. , Petluru P. , Muhowski A. , Woolf D.N. , Wasserman D.
Published: August 2021

We demonstrate all-epitaxial ultra-thin mid-wave infrared detectors integrated into guided-mode resonance structures. Peak external quantum efficiency above 50 % is reported at λ = 4.5 µm in a 250 nm thick absorber at 200 K.
Ultra-Thin All-Epitaxial Plasmonically Enhanced Long-Wave Infrared Detectors
Authors: Nordin Leland , Garrett Trent , Petluru Priyanka , Kamboj Abhilasha , Muhowski Aaron , Wasserman Daniel
Published: August 2021

We demonstrate all-epitaxial surface plasmon-polariton enhanced type-II superlattice nBn infrared detectors with sub-diffractive absorber thicknesses. Our devices show peak external quantum efficiencies of 50% at 10.4 µm in a 300 nm absorber (∼ λ0/35).
Single Molecule Detection of Fluorophores “Turned-on” by Corrosion Reactions
Authors: Saini Anuj , Messenger Hannah , Kisley Lydia
Published: August 2021

Real-time, single-molecule “turn on” of resazurin by the corrosion of iron was detected by a modern fluorescence microscope to overcome the previous limitations of corrosion detection, opening up a new spatiotemporal regime for studying corrosion.
Toward Artificial Fingertips Based on GaN Optical Tactile Sensors
Authors: Dvorak Nathan , Chung Kunook , Mueller Kobie , Ku Pei-Cheng
Published: August 2021

A tactile sensor using gallium nitride nanopillar light-emitting diodes is proposed and demonstrated. The sensor can detect the direction, magnitude, and location of an external shear force with sensitivities comparable to the human fingertip.
Generation of noise-like pulses in a high numerical aperture fiber seeded by soliton pulses at 1.9 μm
Authors: Turnali Ahmet , Xu Shutao , Sander Michelle Y.
Published: August 2021

We demonstrate that soliton pulses centered at 1.9 μm can evolve into noise-like pulses in a high numerical aperture fiber. The amplified pulses have an energy of 56 nJ and a duration of 210 fs after compression.
10-Gb/s All-Fiber Beamforming LiFi System via Mode-Coupling Control
Authors: Zhang Yiwen , Li Chao , Zhang Xuebing , Cui Jian , Li Juhao , Zhu Lei , Li Zilun , Cao Zizheng , Koonen Antonius Marcellus Jozef , Hsu Chia Wei
Published: August 2021

By controlling the mode coupling in a multi-mode fiber, we realize an all-fiber and low-cost beamforming transmitter and experimentally demonstrate its application for a 10-Gb/s LiFi system at 1550 nm.
A White-Lighting WDM-VLC System
Authors: Feng Chao-Yu , Chou Cing-Ru , Chen Yi-Hao , Nainggolan Agustina , Li Chung-Yi , Lu Hai-Han
Published: August 2021

A white-lighting WDM-VLC system over 20 m free-space distance with 3 m lighting distance is built, adopting an R/G/B triple-light polarization-multiplexing scenario, transmission gratings, and an engineered diffuser with a bi-convex lens as a demonstration.
Nonlinear Frequency Conversion in the Hybrid Silicon Nitride - Lithium Niobate Integrated Platform
Authors: Churaev Mikhail , Riedhauser Annina , Wang Rui N. , Möhl Charles , Snigirev Viacheslav , Hönl Simon , Blésin Terence , Caimi Daniele , Liu Junqiu , Popoff Youri , Seidler Paul , Kippenberg Tobias J.
Published: August 2021

We demonstrate optical frequency comb generation in hybrid high-Q optical microresonators fabricated using direct wafer bonding of photonic Damascene silicon nitride wafer with thin-film lithium niobate-on-insulator (LNOI). The devices enable direct phase control via Pockels effect.
High-performance Bias-drift-free Modulators Based on Heterogeneous Silicon and Lithium Niobate Platform
Authors: Sun Shihao , Yu Siyuan , Cai Xinlun
Published: August 2021

we demonstrate high-speed and bias-drift-free Mach-Zehnder modulators based on the heterogeneous silicon and lithium niobate platform and exhibit a low half-wave voltage of 3 V, and electro-optic modulation bandwidth of at least 70 GHz.
Design principles of apodized grating couplers
Authors: Zhao Zhexin , Fan Shanhui
Published: August 2021

We extend an analytical model for designing apodized grating couplers, considering the constraints on the upper and lower bounds of the scattering strength.
Experimental Demonstration of an Integrated Broadband Pixel-Array Structure Generating Two Tunable Orbital-Angular-Momentum Mode Values and Carrying 100-Gbit/s QPSK Data
Authors: Song Hao , Zhou Huibin , Zou Kaiheng , Zhang Runzhou , Pang Kai , Song Haoqian , Minoofar Amir , Su Xinzhou , Hu Nanzhe , Liu Cong , Bock Robert , Zach Shlomo , Tur Moshe , Willner Alan E.
Published: August 2021

We experimentally demonstrate OAM beam generation with tunable order of ℓ ={−1, +1} and 3-dB bandwidth of ~9 nm using a pixel-array structure. A 100-Gbit/s quadrature-phase-shift-keying communication link carried by the tunable OAM beam is demonstrated.
3D Micro Lenses for Efficient Edge Coupling by Two-Photon Lithography
Authors: Chen Lifeng , Luo Haozhi , Cai Xinlun
Published: August 2021

We demonstrate 3D nano-fabricated lens coupler designs realizing efficient edge coupling for single mode fiber or laser to photonic integrated chips, results show 1dB loss per facet and more than 100 nm wavelength bandwidth.
Low-loss Bi-layer Edge Couplers for Blue Light
Authors: Lin Yiding , Mak Jason C. C. , Chen Hong , Mu Xin , Stalmashonak Andrei , Jung Youngho , Luo Xianshu , Lo Patrick G.-Q. , Sacher Wesley D. , Poon Joyce K. S.
Published: August 2021

We report low-loss silicon nitride bi-layer fiber-to-chip edge couplers on 200-mm silicon wafers for visible spectrum photonic circuits. The minimum per-facet coupling loss at λ=488nm was ~2.6dB (TM), and polarization-independent coupling was achieved with ~3.2-dB loss.
Jones Matrix Holography with Metasurfaces
Authors: Zaidi Aun , Rubin Noah A. , Dorrah Ahmed , Shi Zhujun , Capasso Federico
Published: August 2021

We propose a new class of computer generated holograms whose far fields possess designer-specified polarization response. Using form-birefringent metasurfaces, we demonstrate holograms whose far-fields implement parallel polarization analysis and custom waveplate-like behavior.
Spin To Orbit Conversion Based On Intensity Gradient
Authors: Huang Shuang-Yin , Wang Zhou-Xiang , Lv Jia-Qi , Zhang Guan-Lin , Wang Min , Tian Qian-Qian , Tu Chenghou , Li Yongnan , Wang Hui-Tian
Published: August 2021

We theoretically analyze and verified the optical angular momentum (AM) arising from the gradient of the intensity and also depending on spin through optical trapping experiments and it may also be called spin to orbit conversion.
Optothermal Manipulation of Liquid Droplets
Authors: Kim Youngsun , Zheng Yuebing
Published: August 2021

Optothermal manipulation of liquid was studied with surfactant-free oil-in-water emulsions. Trapping, assembly, and fusion of pure liquid droplets in an aqueous medium were demonstrated by applying an optothermal stimulus and adjusting medium compositions.
Spectrum broadening suppression for kW-class narrow linewidth FBG-based fiber laser
Authors: Wu Yulun , Huang Yusheng , Wang Zehui , Li Dan , Yan Ping , Xiao Qirong , Gong Mali
Published: August 2021

Spectral broadening caused by nonlinear effects was analyzed in the narrow linewidth FBG-based fiber laser. Kilowatt-class narrow linewidth fiber lasers were established. The maximum power and power spectral density were 3 kW and 29.3 W/pm.
Self-injection-locked dual-frequency Brillouin laser operating CW with a simple active feedback loop
Authors: Spirin V.V. , Bueno Escobedo J. L. , Korobko D.A. , Zolotovskii I.O. , Fotiadi A.A.
Published: August 2021

A simple dual-frequency laser, employing a single ring fiber cavity for self-injection-locking of a semiconductor DFB-laser and generation of stimulated Brillouin scattering, features a 300-Hz-width RF spectrum recorded with the beating between two channels.
All-Chalcogenide Single-Mode Brillouin Fiber Laser
Authors: Rezaei Mohsen , Rochette Martin
Published: August 2021

We demonstrate the first all-chalcogenide Brillouin fiber laser. The laser is composed of an As2S3 optical fiber for nonlinear amplification and of an As2Se3 optical fiber coupler to form a resonant ring cavity.
Optical Parametric Oscillator in Thin-Film Lithium Niobate with a 130 µW Threshold
Authors: Stokowski Hubert S. , McKenna Timothy P. , Ansari Vahid , Mishra Jatadhari , Jankowski Marc , Sarabalis Christopher J. , Herrmann Jason F. , Langrock Carsten , Fejer Martin M. , Safavi-Naeini Amir H.
Published: August 2021

We present an integrated optical parametric oscillator in thin-film lithium niobate. Our device is based on a periodically poled racetrack resonator and operates at a telecommunication wavelength with a threshold of 130 µW.
Fully-Resonant Second Harmonic Generation in Periodically Poled Thin-Film Lithium Niobate
Authors: McKenna Timothy P. , Stokowski Hubert S. , Ansari Vahid , Mishra Jatadhari , Jankowski Marc , Sarabalis Christopher J. , Herrmann Jason F. , Langrock Carsten , Fejer Martin M. , Safavi-Naeini Amir H.
Published: August 2021

We demonstrate second harmonic generation in a periodically poled X-cut lithium niobate microresonator with total efficiency greater than 12% and output power greater than 1 mW.
QEPAS Sensor Based on the Tracking of the Photoacoustic Induced Frequency Shift of a Tuning Fork Maintained in Self-Sustained Oscillation by Electrical Excitation
Authors: Duquesnoy M. , Lévy R. , Melkonian J-M. , Aoust G. , Raybaut M. , Godard A.
Published: August 2021

Oscillator frequency shift induced by the photoacoustic force on a closed-loop electrically excited quartz tuning fork is exploited to carry out QEPAS measurement. We report recent improvements of this new method for background-free gas sensing.
Fabrication and characterization of Iodine Vapor Photonic Microcell
Authors: Goïcoechéa C. , Billotte T. , Chafer M. , Maurel M. , Jouin J. , Thomas P. , Gérôme F. , Debord B. , Benabid F.
Published: August 2021

A standalone FC/PC connectorized and sealed Iodine filled hollow core fiber with coupling efficiency as high as 75% and an absorption contrast reaching 65% on the P(33) 6-3 transition at room temperature is demonstrated.
Single-mode inhibited-coupling fiber for sub-Doppler spectroscopy
Authors: Billotte T. , Baclet G. , Osório J. H. , Delahaye F. , Mançois V. , Hilico A. , Maurel M. , Chafer M. , Amrani F. , Gérôme F. , Debord B. , Bouyer P. , Bernon S. , Benabid F.
Published: August 2021

We report on the use and qualification of the recently developed single-mode hybrid hollow-core photonic crystal fiber for a robust and long-life acetylene photonic micro-cell based optical frequency reference.
Secure High Dimensional Quantum Key Distribution Based on Wavelength-Multiplexed Time-Bin Encoding
Authors: Cheng Xiang , Sarihan Murat Can , Chang Kai-Chi , Chen Changchen , Wong Franco N. C. , Wong Chee Wei
Published: August 2021

We experimentally demonstrated high-dimensional quantum key distribution with wavelength-multiplexed time-bin encoding, with photon information efficiency up to 4.082 secure-key bits/photon and secure-key rate up to 237-kbit/s. Security will be verified with dual-basis Franson interferometers.
Tunable Infrared Optics Enabled by Defect-Engineering of Vanadium Dioxide Using Focused Ion Beam
Authors: Wan Chenghao , Rensberg Jura , Zhang Zhen , Hafermann Martin , Mei Hongyan , Xiao Yuzhe , Salman Jad , Ramanathan Shriram , Ronning Carsten , Kats Mikhail A.
Published: August 2021

We demonstrate a simple method of spatially modulating the phase transition of vanadium dioxide using a focused ion beam (FIB). The modulated phase-transition characteristics were quantitatively analyzed, enabling a new platform for tunable infrared optics.
2.35-μm InGaSb/GaSb SESAM
Authors: Alaydin B. O. , Heidrich J. , Gaulke M. , Golling M. , Barh A. , Keller U.
Published: August 2021

We present GaSb-based SESAM at 2.35 µm with record low recovery times (τfast 0.16 ps and τslow 1.9 ps) and adequate optical parameters: modulation depth 1.69%, saturation fluence 10.59 μJ/cm2, and non-saturable loss 0.81%.