bluuebunny/crossref_metadata_2025 huggingface dataset:
Observation of Induced Transparency and Slow Light via Thermo-Optic Effect on a Silicon Chip
Authors: Clementi M. , Iadanza S. , Schulz S. , Urbinati G. , Gerace D. , O'Faloain L. , Galli M.
Published: August 2021

We demonstrate a novel form of induced transparency and associated slow light due to thermo-optic effect. The phenomenon provides group delay as high as 0.5 µs in a silicon photonic crystal cavity at room temperature.
Giant Enhancement of Fluorescence-Detected Circular Dichroism of a Chiral Molecule Inside Photonic Hyper Crystals
Authors: Indukuri S.R.K.Chaitanya , Sharma Nityanand , Frydendahl Christian , Mazurski Noa , Levy Uriel
Published: August 2021

We demonstrate experimentally enhanced Fluorescence-Detected Circular Dichroism (FDCD) of a Chiral Molecule embedded within a negative refractive index hyperbolic metamaterial photonic hyper crystals (HMMPC).
Using symmetry bandgaps to create bound states in the continuum in 3D photonic crystals
Authors: Cerjan Alexander , Jörg Christina , Benalcazar Wladimir A. , Vaidya Sachin , Hsu Chia Wei , von Freymann Georg , Rechtsman Mikael C.
Published: August 2021

We show that photonic-crystal environments can create symmetry-specific bandgaps that host a wide variety of symmetry-protected lines of bound states in the continuum, which we prove to be impossible in homogeneous environments.
Arbitrary designer mode convertor and on-chip OAM generator with configurable topological charge using waveguide-integrated metasurface
Authors: Meng Yuan , He Tiantian , Liu Zhoutian , Hu Futai , Xiao Qirong , Gong Mali
Published: August 2021

Leveraging waveguide-integrated metasurface platform, designer mode convertors capable of exclusively exciting arbitrary high-order modes with high-purity reaching 98% are proposed. We also report on-chip scalable broadband vortex-beam-generators with configurable topological charge from -3 to +3.
Coherent Backscattering of Spatially Entangled Photons
Authors: Safadi Mamoon , Lib Ohad , Bromberg Yaron
Published: August 2021

We report the first observation of coherent backscattering of spatially entangled photons and show that the backscattering cone of entangled photons corresponds to that of single photons with half the wavelength.
The Synthetic Hilbert Space of Laser-Driven Free-Electrons
Authors: Braiman Guy , Reinhardt Ori , Levi Omer , Mechel Chen , Kaminer Ido
Published: August 2021

We propose the concept of free-electrons carrying qudits. We find how electron–laser interactions can shape the electron energy states into arbitrarily-large synthetic Hilbert spaces, exemplified here for size-4.
Optical Pumping of Few Shallow Donor Qubits in ZnO Nanostructures
Authors: Viitaniemi Maria L. K. , Zimmermann Christian , Niaouris Vasilis , Kumar E. Senthil , Watkins Simon , Fu Kai-Mei C.
Published: August 2021

Electrons bound to shallow donor impurities in ZnO are a promising solid state qubit candidate. Small ensembles of defects in ZnO nanostructures exhibit high optical homogeneity and donor spin initialization, comparable to bulk materials.
Heralded Quantum Random Access Memory in a Scalable Photonic Integrated Circuit Platform
Authors: Chen Kevin C. , Dai Wenhan , Errando-Herranz Carlos , Lloyd Seth , Englund Dirk
Published: August 2021

We propose a scalable photonic integrated circuit implementation of a heralded quantum random access memory and analyze its theoretical operation fidelity and efficiency.
Holography of a Photon Without its Detection
Authors: Basset Marta Gilaberte , Töpfer Sebastian , Torres Juan P. , Fuenzalida Jorge , Steinlechner Fabian , Gräfe Markus
Published: August 2021

Single photon holographic methods would aid several applications that raised with recent advances in quantum technologies. Our method records single photon holograms without detecting the photon itself thanks to the concept of induced coherence.
Observation of PT symmetry breaking in two-photon correlations
Authors: Klauck Friederike , Heinrich Matthias , Szameit Alexander
Published: August 2021

We experimentally study the influence of PT-symmetry breaking on two-photon correlations in quasi-PT-symmetric couplers. While quantum interference is faithfully preserved in the unbroken phase. a characteristic rise of off-diagonal terms occurs beyond the exceptional point.
Routing Strategies for High-Fidelity, Multiplexed Quantum Networks
Authors: Lee Yuan , Bersin Eric , Dai Wenhan , Englund Dirk
Published: August 2021

We recently introduced a “quantum router” architecture that improves entanglement fidelities in chains of multiplexed repeaters. Here, we address local entanglement routing across general network graphs of routers to optimize entanglement rates and fidelities.
Continuous-variable error correction for general Gaussian noises
Authors: Wu Jing , Zhuang Quntao
Published: August 2021

We design continuous-variable error correction codes for general correlated and heterogeneous Gaussian noises, based on Gottesman, Kiteav and Preskill states and Gaussian operations, and numerically verify the codes’ performance on random samples.
Mechanical bound states in the continuum for cavity-less optomechanics
Authors: Tong Hao , Liu Shengyan , Zhaoi Mengdi , Fang Kejie
Published: August 2021

We demonstrate a new paradigm of phonon trapping using mechanical bound states in the continuum in slab-on-substrate phononic crystals and show its prospect for realizing quantum optomechanics without using microcavities.
A high-cooperativity, nano-optomechanical system comprised of high stress Si3N4
Authors: Bereyhi Mohammad J. , Arabmoheghi Amirali , Engelsen Nils J. , Kippenberg Tobias J.
Published: August 2021

We report the design fabrication and characterization of a monolithic nano-optomechanical transducer comprised of high stress silicon nitride (Si3N4). Our system features a one dimensional Fabry-Pérot photonic crystal cavity (Q ≈ 105) integrated with a high-Q (Q ≈106) nanobeam resonator with optomechanical cooperativity of C0 = 23.
Nonlinearity-induced transition of topological corner states
Authors: Hu Zhichan , Bongiovanni Domenico , Jukić Dario , Song Daohong , Buljan Hrvoje , Chen Zhigang
Published: August 2021

We investigate nonlinear effects on corner modes in a two-dimensional Su-Schrieffer-Heeger-type photonic platform. Nonlinearity induces transition between corner and edge states in topologically nontrivial lattices, in contrast to facilitating bulk modes in the trivial counterparts.
Lasing from Multipolar Modes of Topological Corner States
Authors: Kim Ha-Reem , Hwang Min-Soo , Smirnova Daria , Jeong Kwang-Yong , Kivshar Yuri , Park Hong-Gyu
Published: August 2021

We demonstrate lasing action from corner states in nanophotonic topological structures. We identify multipole corner modes with distinct emission profiles via hyperspectral imaging and discern signatures of non-Hermitian radiative coupling of the topological states.
Electrically tunable phase-change metasurfaces using transparent conductive oxide microheaters
Authors: Hemmatyar Omid , Abdollahramezani Sajjad , Taghinejad Hossein , Adibi Ali
Published: August 2021

An electrically-tunable all-dielectric metasurface employing a phase-change material, GST, and transparent conductive indium tin oxide (ITO) is designed and experimentally demonstrated for controlling light absorption to enable multi-level electro-optic modulation with unprecedented sensitivity.
95 MHz Bandwidth Electro-Optic Metasurfaces based on Barium Titanate Nanocrystals
Authors: Karvounis Artemios , Vogler-Neuling Viola V. , Grange Rachel
Published: August 2021

We show that photonic metasurfaces based on barium titanate nanocrystals possess strong electro-optic response. Transmission at near infrared wavelength is controlled with low input RF signal < 3 Volts and extends close to 100 MHz.
Optical 2D Coherent Spectroscopy of Photoexcited Carriers in Methylammonium Lead Iodide Perovskite at Room Temperature
Authors: Munoz Maria F. , Fei Chengbin , Wang He , Li Hebin
Published: August 2021

We performed two-dimensional coherent spectroscopy of photoexcited carriers in methylammonium lead iodide perovskite at room temperature. The 2D spectra revealed ultrafast dynamics of two resonances which can be attributed to hot carriers and excitons.
High Harmonic Generation in Topological Chiral Crystals
Authors: Padmanabhan Prashant , Cochran Tyler A. , Sirica Nicholas , Qian Tiema , Ni Ni , Yarotski Dmitry A. , Zhu Jian-Xin , Hasan M. Z. , Prasankumar Rohit P.
Published: August 2021

We demonstrate perturbative optical harmonic generation up to fifth order in the topological chiral crystal RhSi under femtosecond mid-infrared excitation, with particularly strong third harmonic responses that may be linked to Berry curvature contributions.
Ellipticity controlled high-order harmonic generation in 2D materials
Authors: Hollinger Richard , Harshitha N.G. , Korolev Viacheslav , Gan Ziyang , George Antony , Shumakova Valentina , Zürch Michael , Vogl Tobias , Pugžlys Audrius , Baltuška Andrius , Eilenberger Falk , Spielmann Christian , Turchanin Andrey , Kartashov Daniil
Published: August 2021

High harmonic generation (HHG) in a single-atomic-layer non-centrosymmetric semiconductor is investigated experimentally for different driving laser field polarizations. The ellipticity enhanced even-order HHG for certain crystal orientations reveals linked laser and valley polarizations.
Generation of tunable ultrashort X-ray pulses and delta-pulse trains in van der Waals materials
Authors: Balanov Amnon , Gorlach Alexey , Kaminer Ido
Published: August 2021

We find an X-ray generation mechanism based on van der Waals materials, which promises generation of ultrashort pulses, delta-pulse trains, and monochromatic X-ray radiation, with controllable intensity, directionality, and polarization.
Direct quantification of topological protection in symmetry-protected photonic edge states at telecom wavelengths
Authors: Arora Sonakshi , Bauer Thomas , Barczyk René , Verhagen Ewold , Kuipers Kobus
Published: August 2021

Experimental characterization of the electromagnetic vector field in topological photonic crystals featuring the photonic quantum valley Hall effect, using phase-resolving near-field optical microscopy, reveals two orders of magnitude higher robustness compared to a conventional waveguide.
Adaptive-Optics Enhanced Distribution of Entangled Photons over Turbulent Free-Space Optical Channels
Authors: Nafria Vijay , Cui Chaohan , Djordjevic Ivan B. , Zhang Zheshen
Published: August 2021

We experimentally demonstrate using of adaptive optics to mitigate atmospheric turbulence effects on the distribution of entangled photons over free-space optical links and provide significantly improved photon-counting rates and biphoton correlations.
On-Chip Optical Filters for Microwave-Optical Quantum Transduction in Thin-Film Lithium Niobate
Authors: Holzgrafe Jeffrey , Warner Hana , Zhu Di , Sinclair Neil , Colangelo Marco , Batson Emma , Shams-Ansari Amirhassan , Hu Yaowen , Berggren Karl K. , Loncar Marko
Published: August 2021

We describe a low-loss on-chip optical filter network designed to separate pump and signal photons in a cavity electro-optic microwave-optical transducer for enhanced transduction performance.
Oservation of bound excitons stabilised by the interaction with a photonic resonator
Authors: Cortese Erika , Tran Ngoc Linh , Manceau Jean-Michel , Bousseksou Adel , Carusotto Iacopo , Biasiol Giorgio , Colombelli Raffaele , De Liberato Simone
Published: August 2021

We demonstrate that, in cavity-embedded doped quantum wells, strong light-matter interaction can create a bound excitonic state. Such a cavity-stabilised state is spectroscopically observed as a discrete resonance below the ionisation threshold.
Nonlinear Control of PT-symmetry and Topological States
Authors: Xia Shiqi , Kaltsas Dimitrios , Song Daohong , Komis Ioannis , Xu Jingjun , Szameit Alexander , Buljan Hrvoje , Makris Konstantinos G. , Chen Zhigang
Published: August 2021

We demonstrate that optical nonlinearity can effectively modulate the loss of a topological defect waveguide in a non-Hermitian photonic lattice, leading to switching between PT and non-PT-symmetric regimes and control of topological zero modes.
Towards a Common Path Photonic Emulator for Dynamically Encircling an Exceptional Point
Authors: Nasari H. , Lopez-Galmiche G. , Lopez Aviles H. E. , Hassan A.U. , Schumer A. , LiKamWa P. L. , Khajavikhan M. , Christodoulides D. N.
Published: August 2021

We report on the first implementation of a photonic emulator platform upon which dynamic encirclement of an exceptional point can be observed. Using two polarization states, an omnipolarizer is realized based on chiral mode conversion.
Analysis of 56 physically unclonable silicon photonic moiré quasicrystal interferometers
Authors: Tarik Farhan Bin , Famili Azadeh , Lao Yingjie , Ryckman Judson D.
Published: August 2021

We verify the uniqueness and unclonability of fifty-six optical devices of the exact same design, fabricated from silicon photonic moiré quasicrystal interferometers. Such structures show promise for cryptographic applications such as hardware authentication and identification.
Comparison of 100-kHz Near-IR and Mid-IR Driven High-Harmonic Generation in the Water Window
Authors: Chevreuil Pierre-Alexis , Hrisafov Stefan , Brunner Fabian , Pupeikis Justinas , Phillips Christopher R. , Gallmann Lukas , Keller Ursula
Published: August 2021

We report the generation of water window harmonics (283-543 eV) with a 0.8-μm driver at 100 kHz repetition rate, and compare the results with high-harmonic generation at 2.2 μm.
Attosecond metrology at seeded free-electron lasers
Authors: Sansone Giuseppe
Published: August 2021

I will introduce the challenges connected to the temporal characterization of attosecond waveforms at the free-electron laser FERMI and I will present experimental results on the first demonstration of programmable attosecond pulse trains.
Tunable Kerr combs in a normal dispersion pulse-driven mini-resonator
Authors: Xu Yiqing , Sharples Alexander , Fatome Julien , Coen Stephane , Erkintalo Miro , Murdoch Stuart G.
Published: August 2021

Kerr combs are demonstrated in a purely normal dispersion pulse-driven fiber mini-resonator. Though harmonic driving and tunable desynchronization, we are able to control both the spectral extents and line spacing of the output comb.
Super-BIC Laser
Authors: Hwang Min-Soo , Lee Hoo-Cheol , Kim Kyoung-Ho , Jeong Kwang-Yong , Kwon Soon-Hong , Koshelev Kirill , Kivshar Yuri , Park Hong-Gyu
Published: August 2021

We demonstrate lasing with ultralow threshold from small-scale dielectric metasurfaces with only ~10×10 periods operating at a super-BIC regime. Engineered high-Q resonance originates from topological merging of accidental and symmetry-protected bound states in the continuum.
Encoding Qubit-Qudit States in Photon Polarization and Picosecond Time-Bins
Authors: Pilnyak Y. , Schechter Y. , Pleban D. , Vidro L. , Zilber P. , Cohen L. , Istrati D. , Eisenberg H. S.
Published: August 2021

We introduce a qubit-qutrit information system realized by two degrees of freedom in a single photon: polarization and picosecond time-bin. We demonstrate creation and reconstruction of states in this framework using quantum state tomography.
The effect of photo-carrier doping on the generation of high harmonics from MoS2
Authors: Heide Christian , Kobayashi Yuki , Liu Fang , Ghimire Shambhu , Heinz Tony F. , Reis David A.
Published: August 2021

We report the influence of photo-carrier doping on high-harmonic generation in monolayer MoS2. The observed decrease in efficiency suggests a strong role for interband transitions in mid-IR driven HHG in this prototypical 2D semiconductor.
Non-Linear “Thermal Ratchet” for Light
Authors: Cohen Moshe-Ishay , Sharabi Yonatan , Lumer Yaakov , Segev Mordechai
Published: August 2021

We show that non-local nonlinearity can induce a preferred direction for the flow of random photonic wavepackets even in periodic structures. The phenomenon is nonlinear hence the directional transport depends on the optical power.
Ultra-strongly-coupled long-range, low-loss polaritonic modes in gold and indium tin oxide bi-films at NIR frequencies
Authors: Choudhary Saumya , Iqbal Saleem , Reshef Orad , Karimi Mohammad , Alam M. Zahirul , Boyd Robert W.
Published: August 2021

We demonstrate that ultra-strongly coupled SPP and ENZ modes in gold and indium tin oxide bi-films are strongly confined, can propagate for several microns, and offer a useful platform for nanophotonics at NIR frequencies.
Halide Perovskite Metamaterial Directional Emitter
Authors: Chen Yixin , Cai Jinze , Ma Xuezhi , Lan Shoufeng , Wong Zi Jing
Published: August 2021

We propose an integrated perovskite metamaterial that enables wavefront control of the light emitted from halide perovskites. Through the incorporation of dielectric metasurface and Bragg cavity, we experimentally show directional emission from CH3NH3PbI3 (MAPbI3) perovskites.
Extremely Non-Adiabatic Switch-Off of Deep-Strong Light-Matter Coupling
Authors: Halbhuber Maike , Mornhinweg Joshua , Zeller Viola , Ciuti Cristiano , Bougeard Dominique , Lange Christoph , Huber Rupert
Published: August 2021

Switching off deep-strong light-matter coupling extremely non-adiabatically results in pronounced subcycle polarization oscillations. Our quantum model verifies that light-matter decoupling occurs more than an order of magnitude faster than the optical cycle duration.
Quantum-Optimal Binary Object Classification in Sub-Diffraction Incoherent Imaging
Authors: Grace Michael R. , Guha Saikat
Published: August 2021

We derive the quantum limit on average error for hypothesis tests between any two incoherent, diffraction-limited objects and identify quantum-optimal measurements that achieve a quadratic scaling improvement over direct imaging.
Silicon nitride metasurfaces in structural colors and advanced coherent light sources
Authors: Yang Jhen-Hong , Chen Kuo-Ping
Published: August 2021

Dielectric metasurface-based artificial pixels are promising candidates for developing flat, flexible, and/or wearable displays. In this work, we have demonstrated the silicon nitride metasurfaces with the function of structural colors and also lasing nanodevices.
Multipole Resonances for Directional Lasing and Wavefront Shaping
Authors: Karimi Vahid , Babicheva Viktoriia E.
Published: August 2021

The ultra-thin high-refractive-index nanostructures can be designed for amplitude and phase modulation in light-emitting devices. We analyze the gallium arsenide nanopillars to establish a guideline for the desired phase modulation in the metasurfaces.
Stimulated Slowing of Yb Atoms on the Narrow 1S0 →3P1 Transition
Authors: Narong Tanaporn Na , Hollberg Leo
Published: August 2021

We propose a method for slowing, cooling and trapping Yb atoms using stimulated forces and only the 1S0 → 3P1 transition. With laser frequency chirp, our computer simulation predicts a MOT loading rate over 108 atoms/s.
Sub-wavelength Spin Excitations Driven by Stimulated Raman Transitions in Ultracold Gases
Authors: Ilin Yigal , Tsesses Shai , Bartal Guy , Sagi Yoav
Published: August 2021

We present sub-wavelength periodic spin textures of spatially varying Raman Rabi frequency created by evanescent-wave optical lattice. Our results open the door to the study of spin excitation dynamics in ultracold gases.
Intrinsic Calibration of Molecular Alignment Using Rotational Echoes
Authors: Rosenberg Dina , Fleischer Sharly
Published: August 2021

Coherent control of molecular rotations has been thoroughly studied and vastly utilized in the last three decades. Motivated by obtaining spectroscopic signatures from the molecular frame, researchers have invented a large and sophisticated toolbox for controlling the angular distribution of gas phase molecules via their interaction with strong laser pulses. In fact, the field of rotational control has evolved in parallel to and from rotational coherence spectroscopy that aims to obtain accurate measurements of molecular rotational coefficients, from which the molecular structure can be deduced.
Structuring phase and polarization singularity sheets in 2D
Authors: Lim Soon Wei Daniel , Park Joon-Suh , Meretska Maryna L. , Dorrah Ahmed H. , Capasso Federico
Published: August 2021

Beyond one-dimensional optical singularity topologies, we demonstrate zero-dimensional (point) and two-dimensional (sheet) singularities. We engineer phase and polarization sheet singularities through inverse-design, by maximizing the field phase gradient, and demonstrate metasurface-enabled realizations of each.
Extraordinarily Strong Second Harmonic Generation Enhancement in Hybrid Plasmon-Fiber Cavity System
Authors: Ai Qi , Sterl Florian , Zhang Han , Wang Jianfang , Giessen Harald
Published: August 2021

We demonstrate a high-quality plasmon-fiber cavity in a doubly resonant configuration which can exhibit second-harmonic generation with over 5 orders of magnitude enhancement compared to gold nanoparticles on a fused silica substrate.
Demonstration of Wavelength Conversion by FWM Near 1550-nm in a Sub-Wavelength Antenna-ENZ Metasurface
Authors: Manukyan Karapet , Liu Cong , Alam M. Zahirul , Pang Kai , Song Hao , Fallahpour Ahmad , Hendrickson Joshua R. , Smith Evan M. , Walker Dennis E. , Vangala Shivashankar , Boyd Robert W. , Tur Moshe , Willner Alan E.
Published: August 2021

We experimentally demonstrate wavelength conversion by four-wave mixing in an epsilon-near-zero based metasurface. We observed conversion efficiency of 0.16% using a 127-nm thick metasurface near the 1550-nm C band with 4-GW/cm2 pump peak intensity.
Ultrafast Raman-induced Coupling of Femtosecond Soliton Molecules via Optical Terahertz Phonons
Authors: Völkel Alexandra , Herink Georg
Published: August 2021

We identify the origin of closely-bound soliton states in femtosecond lasers via real-time spectroscopy: Impulsive Raman scattering stimulates coherent optical phonon vibrations, undulating the propagation of trailing solitons, enabling soliton-binding and rapid Raman-sampling.
Optical neuromorphic processing based on Kerr microcombs
Authors: Xu X. , Tan M. , Wu J. , Boes A. , Corcoran B. , Nguyen T. , Chu S. T. , Little B. E. , Morandotti R. , Mitchell A. , Hicks D. , Moss D. J.
Published: August 2021

We report a new approach to ONNs based on integrated Kerr micro-combs that is programmable, highly scalable and capable of reaching ultra-high speeds. We demonstrate a single neuron perceptron at 11.9 Giga-OPS at 8 bits per OP, or 95.2 Gbps. We then demonstrate a convolutional accelerator operating beyond 11 TeraOPs/s. We test the perceptron on handwritten-digit recognition and cancer-cell detection — achieving over 90% and 85% accuracy, respectively.
A Codesigned Photonic Electronic MAC Neuron with ADC-Embedded Nonlinearity
Authors: De Marinis L. , Catania A. , Castoldi P. , Bruschi P. , Piotto M. , Andriolli N.
Published: August 2021

We present a reduced-precision integrated photonic electronic multiply-accumulate (MAC) neuron with ADC-embedded nonlinearity. The proposed device trades off speed with resolution, outperforming both analog and digital electronic solutions in terms of speed and energy consumption.
Simple one-step-tapering 20μm-to-50μm monolithic MFA for long-distance high-power laser transmission applications
Authors: Tao Rumao , Liu Yu , Xie Lianghua , Zhang Chun , Wu Wenjie , Huang Shan , Song Huaqing , Li Min , Feng Xi , Shen Benjian , Lin Honghuan , Wang Jianjun , Jing Feng
Published: August 2021

A 20μm-to-50μm monolithic MFA has been designed and fabricated by only one-step-tapering. With the MFA, 1kW laser beam with nearly diffraction-limited beam quality has been demonstrated after 15m propagation in highly multimode 50μm/0.11 NA fiber with different bend diameters.
Two Gigahertz Femtosecond Cr:ZnS Oscillator at 2.4 μm with 0.8-W Average Output Power
Authors: Barh A. , Alaydin B. O. , Heidrich J. , Gaulke M. , Golling M. , Phillips C. R. , Keller U.
Published: August 2021

We present a SESAM mode-locked self-starting Cr:ZnS oscillator delivering ~ 255 fs transform limited pulses at record high repetition rate above 2 GHz with average output power of 0.8 W at 2.4 μm.
Femtosecond pulses from a mid-infrared quantum cascade laser
Authors: Taeschler Philipp , Betrand Mathieu , Schneider Barbara , Singleton Matthew , Jouy Pierre , Beck Mattias , Faist Jérôme
Published: August 2021

We report on the formation of near-transform-limited sub-picosecond pulses from a mid-infrared quantum cascade laser with several Watts of peak power. Starting from a frequency-modulated phase-locked state, which most efficiently exploits the gain from the active region, ultrashort high peak power pulses are generated via external pulse compression. The temporal nature of these pulses is assessed by means of coherent beatnote interferometry, optical sampling and an interferometric autocorrelation technique.
2-μm-band Coherent Transmission of Nyquist-WDM 16-QAM Signal by On-chip Spectral Translation
Authors: Kong Deming , Liu Yong , Ren Zhengqi , Jung Yongmin , Kim Chanju , Chen Yong , Wheeler Natalie , Pu Minhao , Yvind Kresten , Galili Michael , Oxenløwe Leif K , Richardson David J , Hu Hao
Published: August 2021

We propose and demonstrate the first low-latency 2-μm-band coherent N-WDM transmission by on-chip spectral translation of 4×32-Gbaud 16-QAM signals with 33-GHz spacing. 318.25 Gbit/s net-rate is achieved with error-free performance after 1.15-km hollow-core fiber transmission.
Hybrid Aluminum Nitride Integration on Silicon Nitride Photonic Circuits
Authors: Terrasanta Giulio , Müller Manuel , Sommer Timo , Althammer Matthias , Poot Menno
Published: August 2021

We demonstrate sputtering of high-quality aluminum nitride films onto prefabricated silicon nitride photonic circuits, simplifying their nanofabrication. Hybrid microring devices show reduced bending loss and low propagation losses, enabling future on-chip quan-tum optics experiments.
Hybrid Probabilistic-Geometric Shaped LDPC-coded PM-16QAM in 140 km DWDM Metro Network Communication
Authors: Han Xiao , Djordjevic Ivan B , Jovanovic Aleksandra Z.
Published: August 2021

We implement a hybrid probabilistic-geometric shaping (PGS) LDPC-coded PM-16QAM in a 140 km DWDM metro-network-communication link. We experimentally demonstrate that hybrid PGS LDPC-coded-modulation scheme can provide 0.95 dB improvement over corresponding uniform-distribution-based scheme.
Amplitude- and frequency-modulated comb laser with sub-kHz RF beat note line width
Authors: Wegert Leonard , Auth Dominik , Weber Christoph , Kazakov Dmitry , Piccardo Marco , Hillbrand Johannes , Schwarz Benedikt , Capasso Federico , Breuer Stefan
Published: August 2021

The generation of frequency-modulated and amplitude-modulated combs on demand by a multi-section quantum dot laser are presented. The combs are centered at 1265 nm (7900 cm-
1
). Temporally- and spectrally-resolved intensity and inter-modal phase as well as time and frequency domain analysis identify frequency-modulated and amplitude-modulated comb generation in dependence on the laser gain current and absorber reverse bias voltage. Radio-frequency beat note line widths as low as 200 Hz are reported.
50Gbps single mode 1060nm intracavity metal aperture VCSEL with transverse resonance
Authors: Ibrahim Hameeda R , Hassan Ahmed , Gu Xiaodong , Shinada Satoshi , Ahmed Moustafa , Koyama Fumio
Published: August 2021

We demonstrate 1060nm intracavity metal-aperture VCSELs with 50Gbps high-speed modulations in single-mode operations. The intracavity metal-aperture causes the transverse resonance which provides the modulation bandwidth-enhancement to go beyond the limit of relaxation oscillation frequencies.
High repetition-rate 1,2 Terawatt diode pumped laser
Authors: Gontier E. , Mortz A. , Brisset J.-G. , Durand M. , Saci A. , Sevillano P. , Courjaud A.
Published: August 2021

We report a diode-pumped laser delivering 518mJ and 435fs pulse duration at 50Hz repetition rate, corresponding to 1,2 Terawatt peak power. The pulse is 3% close to TF limit, and the Strehl ratio is 0,91.
Up to 50 dB Extinction in Broadband Single-Stage Thermo- Optic Mach-Zehnder Interferometers for Programmable Low-Loss Silicon Nitride Photonic Circuits
Authors: Rao Ashutosh , Moille Gregory , Lu Xiyuan , Westly Daron , Geiselmann Michael , Zervas Michael , Srinivasan Kartik
Published: August 2021

We demonstrate single-stage thermo-optic Si3N4 interferometers with (46.1±2.5) dB average extinction ratio over 1460-1640 nm (≈50× of typical devices). We analyze performance requirements for creating reconfigurable high-quality-factor resonators in programmable circuits using such interferometers.
Dynamic Measurement of Fiber-Birefringence Spatial Distribution by Coherent Heterodyne Detection of Rayleigh Backscattered Light
Authors: Takei Nanako , Ryu Shiro
Published: August 2021

Dynamic measurement of fiber-birefringence spatial distribution along the fibers is performed by coherent heterodyne detection of Rayleigh backscattered light. Local fiber vibration at 250 Hz over the 80-km-long fibers was successfully measured by the technique.
Spatial Beam Evolution in Nonlinear Multimode Fibers
Authors: Jima M. A. , Deliancourt E. , Jauberteau R. , Leventoux Y. , Niang A. , Krupa K. , Mansuryan T. , Fabert M. , Février S. , Tonello A. , Modotto D. , Sidelnikov O. , Wabnitz S. , Barthélémy A. , Kermene V. , Desfarges-Berthelemot A. , Millot G. , Couderc V.
Published: August 2021

We discuss some recent results illustrating the role of input wave-front shaping, propagation dynamics and output beam diagnostics in order to observe spatial beam cleaning in nonlinear multimode fibers and amplifiers.
3D Tracking of Water-Dispersed-Nanosphere in Microstructured Fibers
Authors: Jiang Shiqi , Förster Ronny , Kobelke Jens , Schmidt Markus A.
Published: August 2021

We presented two designs of microstructured fibers which can be applied to 3D tracking of water-dispersed-nanoparticles with high spatiotemporal resolution and long observation time by retrieving the depth information from the scattered intensity.
Low-noise, Frequency-agile, Hybrid Integrated Lasers for LiDAR
Authors: Lihachev Grigory , Riemensberger Johann , Weng Wenle , Liu Junqiu , Tian Hao , Siddharth Anat , Wang Rui Ning , Snigirev Viacheslav , Bhave Sunil A. , Kippenberg Tobias J.
Published: August 2021

We demonstrate a hybrid photonic integrated laser that exhibit intrinsic linewidth of 40 Hz, while offering unsurpassed megahertz actuation bandwidth with the tuning range larger than 1 GHz, attained by a DFB laser self-injection locking to a high-Q Si3N4 microres- onator with AlN piezoelectrical actuator, allowing both single line operation and microcomb generation. We develop a compact FMCW LiDAR engine with triangular chirp optical signals at a rate up to 1 MHz, without requiring any linearisation.
Inverse designed arbitrary fiber mode convertors with high efficiency for OAM generations and MDM applications
Authors: Liu Zhoutian , Meng Yuan , Zhou Zhuorun , Wang Lue , Xiao Qirong , Li Dan , Yan Ping , Gong Mali
Published: August 2021

We propose a set of inverse-designed nanostructured fibers capable of performing arbitrary mode conversion and OAM generations with configurable topological charge 1 ~ 3, with high mode-purity exceeding 98% and ultrabroad bandwidth over 370 nm.
Rapid Passage Signals from CO2 at 1.6 µm Using a Dual Chirped- Pulse Electro-Optic Comb System with High-Order Interleaving
Authors: Stroud Jasper R. , Simon James , Wagner Gerd A. , Plusquellic David F.
Published: August 2021

We demonstrate a method for interleaving high-order sidebands in a fast-sweeping electro-optic dual-comb system. We probe CO2 at 1.6 µm and show sweep-rate dependent rapid- passage effects modeled with the Maxwell-Bloch equations.(/p)(p)Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States.
Mid-infrared dual-comb spectroscopy with GHz resolution using soliton microcombs
Authors: Bao Chengying , Yuan Zhiquan , Wu Lue , Suh Myoung-Gyun , Lin Qiang , Vahala Kerry
Published: August 2021

Microcomb based dual-comb spectroscopy of methane in the mid-infrared is demonstrated with GHz resolution. This fine resolution is enabled by generating spectrally densified mid-infrared combs via interleaved difference-frequency-generation.
Laser nanostructuring by tailored free carrier generation in designer semiconductor metasurfaces
Authors: Shcherbakov Maxim R. , Sartorello Giovanni , Tripepi Michael , AlShafey Abdullah , Bosch Melissa , Talisa Noah , Chowdhury Enam , Shvets Gennady
Published: August 2021

We demonstrate the formation of high aspect ratio nano-trenches in ultrafast laser- illuminated semiconductor meta-atoms enabled by photoinduced free-carrier generation inside localized hot spots.
Laser-structured ZnO/p-Si Photodetector with Enhanced and Broadband Responsivity
Authors: Chatzigiannakis Georgios , Jaros Angelina , Leturcq Renaud , Jungclaus Jörgen , Voss Tobias , Gardelis Spiros , Kandyla Maria
Published: August 2021

We develop ZnO/p-Si photodetectors by ALD deposition of ZnO thin films on laser- microstructured Si, which demonstrate high sensitivity and broadband operation (UV-Vis-NIR), due to increased specific surface area of the heterojunction and increased light absorption.
Desorption Driven High Spatial Frequency LIPSS Formation in GaAs
Authors: Sarracino Alex , Torralva Ben , Ansari Abdul R. , Yalisove Steven
Published: August 2021

A new mechanism of High Spatial Frequency Laser Induced Periodic Surface Structures (HSFL) formation is presented, where desorption of atomic constituents from 390 nm light irradiation leads to HSFL with a period of 65 nm.
Plasmonic Metasurfaces for Directional Light Emission and Photodetection
Authors: Paiella Roberto
Published: August 2021

We report the development of near-infrared plasmonic metasurfaces integrated with optoelectronic active materials for the demonstration of geometrically tunable collimated light emission and angle-sensitive photodetection.
Achieving Effective Solar-Blind Photoelectrochemical-type Photodetection via Pt-decorated AlGaN Nanostructures
Authors: Wang Danhao , Yu Huabin , Zhang Haochen , Xing Chong , Liu Zhongling , Sun Haiding
Published: August 2021

Self-powered solar-blind photoelectrochemical-type photodetectors based on platinum- decorated self-assembled AlGaN nanostructures were constructed for the first time, demonstrating high responsivity and record fast response/recovery time without an external power source.
Germanium Mid-infrared Integrated Photonics on GeOI Platform
Authors: Takenaka Mitsuru , Zhao Ziqiang , Ho Chong Pei , Fujigaki Takumi , Toprasertpong Kasidit , Takagi Shinichi
Published: August 2021

We present a Ge-on-insulator (GeOI) photonics platform for mid-infrared wavelengths. The strong optical confinement in GeOI enables ultracompact passive waveguide devices as well as efficient thermo-optic switch, carrier-injection optical modulator, and defect-mediated photodetector.
Ultra-Sensitive and Selective Detection of DNA and Protein Biomarkers Using Frequency-Locked Microtoroid Optical Resonators
Authors: Su Judith
Published: August 2021

We use frequency-locked microtoroid optical resonators to detect protein and DNA biomarkers at attomolar to femtomolar concentrations, depending on the target. We measure binding affinities and validate our results against existing technologies.
Thin-Film Thermophoresis in Photoninc Band Gap Fibers for Sub-nanoMolar Raman Sensing Sensitivity
Authors: Eleftheriades Basil G. , Storey Emily E. , Helmy Amr S.
Published: August 2021

We present sub-nanomolar Raman detection of nanoparticles, without SERS, enabled by thin-film thermophoreis via photonic bandgap confinement. We achieve sensitivity-of- detection at 0.240 nM, an enhancement of over 8 orders of magnitude.
Ghost Resonance Spectroscopy
Authors: Khan Emroz , Debnath Sanjay , Narimanov Evgenii E.
Published: August 2021

We show the recently discovered ghost waves, a special class of non-uniform waves in biaxial anisotropic media, can offer a new approach to optical sensing, that employs simple planar geometry and low-cost dielectric materials, and provides a high figure of merit for sensor performance.
Experimental Investigation on Degradation of an Orbital- Angular-Momentum Beam Passing Through Dynamic Aerosol and Air-Water Interface for Air-to-Water Communications
Authors: Song Haoqian , Zhang Runzhou , Hu Nanzhe , Zhou Huibin , Su Xinzhou , Zou Kaiheng , Pang Kai , Song Hao , Liu Cong , Lynn Brittany , Tur Moshe , Willner Alan E.
Published: August 2021

We experimentally investigate the degradation of a data-carrying OAM beam passing through dynamic aerosol and non-planar air-water interface and observe an up to -6.5-dB modal crosstalk from OAM -1 to OAM +1 under the effects.
Observation of Stimulated Brillouin Scattering in Ge25Sb10S65 Chalcogenide Waveguides
Authors: Song Jingcui , Guo Xiaojie , Wan Lei , Zhang Mingjie , Zhang Bin , Li Zhaohui
Published: August 2021

We demonstrate stimulated Brillouin scattering in Ge25Sb10S65 chalcogenide waveguides. The measured Brillouin shift is 7.443 GHz. A 17.6-dB on-off gain is obtained at 200-mW coupled pump power, corresponding to a Brillouin-gain coefficient of 338 m−1W−1.
Inverse-designed optical link for chip-to-chip communication
Authors: Yang K.Y. , White A.D. , Ashtiani F. , Chang L. , Song H. , Zou K. , Zhou H. , Pang K. , Ahn G.H. , Netherton A. , Skarda J. , Su L. , Vercruysse D. , MacLean J. , Aghaeimeibodi S. , Willner A.E. , Bowers J.E. , Aflatouni F. , Vučković J.
Published: August 2021

We experimentally demonstrate a chip-to-chip optical interconnect using inverse-designed silicon photonic circuits. Inverse design optimizes mode-division multiplexing and grating coupler structures in a compact footprint with low insertion loss.
A high aspect-ratio holey metalens
Authors: Lim Soon Wei Daniel , Meretska Maryna Leonidivna , Capasso Federico
Published: August 2021

We design and fabricate metalenses comprising substrateless ultra-deep via-holes in silicon with aspect ratios exceeding 30:1. Deep holes allow us to circumvent fabrication and fragility constraints which limit the aspect ratios of free-standing meta-atoms.
Linewidth Narrowing of a High Power Polarization Maintaining Fiber Amplifier using Nonlinear Phase Demodulation
Authors: Goodno Gregory D.
Published: August 2021

Nonlinear phase demodulation was applied to narrow the linewidth of a kilowatt-class polarization maintaining fiber amplifier by 7x past the threshold for stimulated Brillouin scattering.
Fiber-connected 3D Printed Hollow-core Light Cage for Gas Detection
Authors: Jang Bumjoon , Gargiulo Julian , Kim Jisoo , Bürger Johannes , Lehmann Hartmut , Wieduwilt Torsten , Maier Stefan A. , Schmidt Markus A.
Published: August 2021

The light cage is a 3D nanoprinted hollow-core waveguide which can be used as an integrated light-matter interaction platform. Here we present the fiber-connected version of light cage and demonstrate ammonia gas sensing using tunable diode laser absorption spectroscopy.
Hollow-Core-Fiber Delivery of Broadband Mid-Infrared Light for Remote Multi-Species Spectroscopy
Authors: Johnson Kerr , Castro-Marin Pablo , Farrell Carl , Davidson Ian A. , Jasion Greg T. , Wheeler Natalie V. , Poletti F. , Richardson D. J. , Reid Derryck T.
Published: August 2021

High-resolution multi-species spectroscopy is achieved by delivering mid-infrared light through a hollow-core silica fiber. Concentrations of H37Cl, H35Cl, H2O, CH4, C3H6O and C3H8O are simultaneously obtained by a multi-parameter fit with up to 5-ppb precision.
Plasma and fiber spatial multi-mode initiated stable soliton self-compression and spectral bouncing in air-filled Kagome HCPCF
Authors: Maurel M. , Amrani F. , Babushkin Ihar , Debord B. , Gérôme F. , Benabid F.
Published: August 2021

We report on a nonlinear compression down to 20 fs in air-filled HCPCF. Novel spectral-temporal dynamic is demonstrated. Spectral bouncing of the compressed pulse is triggered by the interplay between Raman redshift and plasma blueshift.
Fibre-based pressure-controlled sources for quantum optics
Authors: Joly N.Y. , Hammer J. , Chekhova M.
Published: August 2021

We present progress towards the generation of photon triplet states and realisation of a tunable source of entangled photons. In both cases, control of the phase-matching is achieved through gas-pressure tuning.
High-purity orbital angular momentum states from a visible metasurface laser
Authors: Naidoo Darryl , Sroor Hend , Huang Yao-Wei , Sephton Bereneice , Vallés Adam , Ginis Vincent , Zhan Qiwen , Qiu Cheng-Wei , Ambrosio Antonio , Capasso Federico , Forbes Andrew
Published: August 2021

We demonstrate the selection of twisted light carrying Orbital Angular Momentum (OAM) of l = 100 with an 88% purity by arbitrary spin-to-orbit coupling inside a visible solid-state laser with a metasurface device.
Intracavity-Mode-Conversion Structured-Light Laser
Authors: Pan Jing , Shen Yijie , Wang Hao , Wang Zhaoyang , Wan Zhensong , Fu Xing , Zhang Hengkang , Liu Qiang
Published: August 2021

The astigmatic mode converter is exploited as an intracavity element to establish a structured-light laser scheme, realizing free control of two-dimensional indices of laser modes and large-range tunability of radial- and orbital-angular-momenta (p-to-4ℏ and ℓ-to-±15ℏ).
Experimental validation of free-space coherent beam combining simulations for filled aperture configuration
Authors: Dixit Awakash , Sooraj M. S. , Linslal C. L. , Padmanabhan A. , Venkitesh D. , Srinivasan B.
Published: August 2021

A theoretical model for filled aperture coherent beam combining has been developed and the simulation results are validated through coherent beam combination of two 100 W laser beams using a diffractive optical element.
Towards Real-time Adaptable Machine Learning-based Photoinjector Shaping
Authors: Hirschman Jack , Lemons Randy , Coffee Ryan , Belli Federico , Carbajo Sergio
Published: August 2021

Hardware-based machine learning for photoinjector manipulation is a promising solution for real-time adaptive electron-beam manipulation. We present preliminary studies towards this goal including simulations of the optical system and early machine learning results.
Referencing Laser Frequency To Ultra-stable Reference Clocks For Future MCM Missions
Authors: Wade Andrew , Rees Emily Rose , Shaddock Daniel A. , McKenzie Kirk
Published: August 2021

We present an electro-optic technique that generates an independent readout of optical cavity mode frequency spacing. We demonstrate a fractional frequency drift resolution of 1 ppb, sufficient to meet expected future mass change mission requirements.
Synchronization of an optical frequency comb and a microwave oscillator with -174 dBc/Hz noise floor
Authors: Ahn Changmin , Na Yongjin , Kim Jungwon
Published: August 2021

We demonstrate optical-microwave timing synchronization by employing electro-optic sampling-based timing detector with residual phase noise (at 8-GHz carrier) of –174.5 dBc/Hz at 100 kHz offset frequency and 88-as integrated timing jitter (over 1-MHz bandwidth).
Maxwell-Boltzmann PMF Design Using Machine Learning for Reconfigurable Optical Fiber Networks
Authors: Hansen Henrik Enggaard , Yankov Metodi P. , Oxenløwe Leif Katsuo , Forchhammer Søren
Published: August 2021

A neural network is used to predict the optimal Maxwell-Boltzmann probabilistic constellation shaping for a nonlinear channel with inline dispersion-compensation. The network uses only system parameters available at the transmitter and thus requires no feedback.
Dual-learning based Neural Networks for Short-reach Optical Communications
Authors: Chen Hao , Liu Xing , Fan Zhaoquan , Hu Chengju , Zhao Jian
Published: August 2021

We propose a novel dual-learning (DL) based NN that operates in a self-regularization manner to improve the generalization ability and show in 28Gbaud PAM-4 experiments that this method outperforms filtering solutions and conventional NN methods.
SOAs and Digital Linearization in Optical Networks – A Stochastic Investigation
Authors: Sime Jacqueline E. , Morel Pascal , Stievano Igor Simone , Telescu Mihai , Tanguy Noël , Azou Stéphane
Published: August 2021

Digital predistortion has recently spurred interest in photonics. In this paper, the authors perform a sensitivity analysis of three digital predistortion algorithms and demonstrate an increase in performance and, in some cases, robustness to uncertainties.
High power and high beam quality surface grating VCSEL
Authors: Hassan Ahmed M.A , Gu Xiaodong , Nakahama Masanori , Shinada Satoshi , Ahmed Moustafa , Koyama Fumio
Published: August 2021

We demonstrate single-mode surface grating VCSELs with mm-long oxide-aperture, exhibiting 3W pulsed output power and high beam quality. Stable single mode operation is obtained by shallow surface grating with beam divergence angle of 0.053°.
Linearized Single Sideband Modulation Link with High Power Efficiency
Authors: Bai Yunping , Huang Shanguo , Su Zhonghan , Zheng Zhennan , Song Xiyao , Zhang Hao , Gao Guanjun , Gao Xinlu
Published: August 2021

A novel linearized single sideband modulation link with tunable optical carrier to sideband ratio is proposed and experimentally demonstrated. The link can realize dispersion immunity, suppressing nonlinearity and improving power efficiency simultaneously.
5-11 μm Supercontinuum Generation Using Cascaded Nonlinearities in Fluoride Fiber and ZGP
Authors: Salem Reza , Backus Sterling , Liu DongFeng , Wan Chenchen , Domingue Scott , Kirchner Matt , Cable Alex , Fendel Peter
Published: August 2021

We present a femtosecond-pumped, octave-spanning, FTIR-compatible supercontinu-um covering 5-11 μm. The SC is generated with record efficiency in ZGP through intra-pulse DFG of a spectrally broaden fiber laser with a 15-fs pulse centered around 2-μm.
Cryogenic Operation of DC Kerr Silicon Photonic Modulators
Authors: Chakraborty Uttara , Carolan Jacques , Clark Genevieve , Bunandar Darius , Gilbert Gerald , Notaros Jelena , Watts Michael R. , Englund Dirk
Published: August 2021

We demonstrate DC-Kerr-effect-based modulation at a temperature of 5 K at GHz speeds in silicon photonic phase shifters fabricated in a CMOS-compatible process. The cryogenic performance of the devices remains comparable to that at room temperature.
Tunable High Quality-Factor Silicon Microring Resonator Driven by High-Mobility Transparent Conductive Oxide
Authors: Hsu Wei-Che , Zhen Cheng , Wang Alan X.
Published: August 2021

We demonstrated a silicon microring resonator driven by a titanium-doped indium oxide capacitor with 10 nm hafnium oxide insulator, achieving a high quality-factor of 11,700 with a high electro-optic tunability of 120 pm/V.
16-Core Recirculating Programmable Si Photonic MEMS
Authors: Kim Do Y. , Park Young J. , Kim Dong U. , Hong Myung S. , Takabayashi Alain Y. , Jeong Youngjae , Park Jongwoo , Han Seungjun , Quack Niels , Yu Kyoungsik , Han Sangyoon
Published: August 2021

We report on a 16-core recirculating programmable photonic array based on MEMS-tunable directional couplers. The photonic array has a compact footprint (0.04mm2/cell) and negligible static power consumption. Waveguide-coupled single-ring resonators, CROWs, and add-drop filters are demonstrated.
Femtojoule, Femtosecond, All-Optical Switching in Integrated Lithium Niobate Photonics
Authors: Guo Qiushi , Sekine Ryoto , Ledezma Luis , Dean Devin J. , Nehra Rajveer , Roy Arkadev , Marandi Alireza
Published: August 2021

We introduce and demonstrate an integrated nonlinear splitter in quasi-phase matched lithium niobate nanophotonic waveguide featuring femtojoule all-optical switching with instantaneous response and 8.5 dB extinction, opening opportunities for on-chip ultrafast energy-efficient all-optical information processing.
Laser Frequency Drift Stabilization using an Integrated Dual-Mode Locking Si3N4 Waveguide Reference Cavity
Authors: Zhao Qiancheng , Harrington Mark W. , Isichenko Andrei , Brodnik Grant M. , Liu Kaikai , Behunin Ryan O. , Rakich Peter T. , Hoyt Chad W. , Fertig Chad , Papp Scott B. , Blumenthal Daniel J.
Published: August 2021

We demonstrate an integrated Si3N4 waveguide resonator designed as a dual-mode locking (DML) cavity that stabilizes laser frequency to 1.7×10-10 Allan deviation in a 1000-second average measurement with a temperature sensitivity of 187.56 MHz/K.