bluuebunny/crossref_metadata_2025 huggingface dataset:
Photonic Modulation Using Antimony-Trisulphide Phase Change Huygens Metasurfaces
Authors: Padmanabha Siddharth , Oguntoye Isaac O. , Frantz Jesse , Myers Jason , Bekele Robel , Clabeau Anthony , Escarra Matthew D.
Published: August 2021

We design switchable antimony trisulfide (Sb2S3) Huygens metasurfaces for optical modulation. Simulation results show near 2π phase modulation with ~15dB amplitude modulation optimizable by spectral resonance tuning at near infrared wavelengths. Experimental verification is in progress.
Dissipative dynamics of chirped-pulse Kerr resonators
Authors: Dong Xue , Spiess Christopher , Bucklew Victor G. , Renninger William H.
Published: August 2021

Here we investigate the unique dissipative properties of chirped-pulse solitons in normal dispersion Kerr resonators. Chirped pulses are stable despite >90% round-trip loss and the required drive power has a beneficial insensitivity to cavity losses.
Graphene Optoelectronic Artificial Intelligence Accelerators
Authors: Gao Weilu , Yu Cunxi , Chen Ruiyang
Published: August 2021

We present a graphene-based optoelectronic artificial intelligence accelerator using spatial light modulators and photodetectors, design a method of performing accurate calculations using imperfect components, and show the system capability of accelerating a few representative algorithms.
Ultrafast Charge-Transfer Mediated Indirect-Excitons in CsPbBr3/MoS2 Heterostructure
Authors: Karmakar Riyanka , Sen Dipankar , Mandal Dipendranath , Adarsh K.V.
Published: August 2021

We demonstrate the ultrafast dynamics of light-induced indirect-excitons (IDEs) in CsPbBr3/MoS2 heterostructure using transient absorption spectroscopy. Our investigations describe the charge-transfer from CsPbBr3 to MoS2 as a dominant mechanism of IDEs formation with picoseconds lifetime.
High Accuracy Intrusion Pattern Recognition using a Dual-Stage-Recognition Network for Fiber Optic Distributed Sensing System
Authors: He Tao , Liu Yijie , Zhang Shixiong , Yan Zhijun , Liu Deming , Sun Qizhen
Published: August 2021

A dual-stage-recognition network combined with the fiber optic DAS system is designed to realize a high accuracy intrusion pattern recognition in practical complicated environments. Field test is performed to verify an average recognition accuracy rate of 97.04% for five typical events including animals, human and mechanical movement.
All-Dielectric Slot Metasurface with Ultra-High-Q resonances
Authors: Algorri J. F. , Dell’Olio F. , Roldán-Varona P. , Rodríguez-Cobo L. , López-Higuera J. M. , Sánchez-Pena J. M. , Zografopoulos D. C.
Published: August 2021

A novel all-dielectric metasurface in silicon-on-insulator technology made of arrayed circular slots is proposed and theoretically studied. The metasurface exhibits quasi-bound states in the continuum resonances, having an ultra-high Q-factor up to 5x108.
WDM integrated silicon nano-slab photodetector for short-reach datacom on silicon nitride-on-SOI platform
Authors: Chatterjee Avijit , Selvaraja Shankar Kumar
Published: August 2021

We demonstrate 1X6 SiN echelle grating filters integrated with silicon nano-slab metal-semiconductor-metal photodetector for SWDM based short-reach interconnect. Echelle grating measures 4.3 dB insertion loss and 22 dB crosstalk. Photodetector records 0.59 A/W responsivity.
Performance Analysis of CdTe Solar Cell using Copper Telluride Back Surface Field for Efficiency Enhancement
Authors: Jain Sudarshan Kumar , Janyani Vijay , Gupta Nikhil Deep
Published: August 2021

Performance analysis of the copper telluride back-surface field-based CdTe thin-film solar cell is presented and has demonstrated that back-surface field contributes most to the CdTe solar cells efficiency enhancement and shows better stability with temperature.
Investigation of Mach Zehnder Modulator Frequency Chirp
Authors: Bui Lam Anh
Published: August 2021

Mach Zehnder modulator chirp is rigorously derived and its behavior versus bias is studied showing the modulator can exhibit a single rather than dual singularities as often expected. The model is verified using rigorous simulations.
Germanium-Tin Lateral p-i-n Waveguide Photodetectors for Mid-Infrared Silicon Photonics
Authors: Lin Kuan-Chih , Kumar Harshvardhan , Chang Guo-En
Published: August 2021

We report on lateral p-i-n GeSn waveguide photodetector on silicon substrates for complementary metal-oxide-semiconductor (CMOS)-compatible mid-infrared silicon photonics.
Billiard-like resonances in metallic nanostructures and their use for efficient ultrafast nonlinear optics
Authors: Babushkin Ihar , Demircan Ayhan , Shi Liping , Morgner Uwe , Herrmann Joachim , Husakou Anton
Published: August 2021

Here we show that discrete resonances, resulting from the quantum confinement of electronic wavefunctions in metallic nanostructures lead to a single strong composite resonance. It can be used for effective low-harmonic (for instance THz) generation.
AI Enhances Femtosecond Spectral Interferometry
Authors: Pu Guoqing , Jalali Bahram
Published: August 2021

We report AI enabled spectral interferometry that infers the magnitude and phase of femtosecond pulses directly from single-shot interference patterns with a performance that is superior to the widely used Hilbert transform algorithm.
Dual-layer SiNx-on-SOI grating coupler as an efficient higher-order fiber mode multiplexer
Authors: Cheng Lirong , Mao Simei , Hu Yixiang , Fu H. Y.
Published: August 2021

We demonstrate a dual-layer grating coupler as an efficient higher-order fiber mode multiplexer. Four channels from a fiber array can be multiplexed into four distinct TE- polarized modes in a few-mode fiber using the proposed multiplexer.
Multi-wavelength tunable fiber laser based on four-leaf clover suspended core fiber filter
Authors: Tang Zijuan , Lian Zhenggang , Lou Shuqin
Published: August 2021

In this paper, a dual-wavelength interval tunable and multi-wavelength switchable fiber laser is proposed and experimentally demonstrated by using a four-leaf clover suspended core fiber filter. The maximal tunable range of dual-wavelength is 41 nm.
Direct attachment of optical fibers to photonic integrated circuits with in situ UV curing
Authors: Bond Gregory , Palone Thomas , van Niekerk Matthew , Serafini John , Ciminelli Mario , Fanto Michael , Preble Stefan
Published: August 2021

Here we present direct attachment of multiple optical fibers to PIC chips at arbitrary pitches. Each fiber is actively aligned and then “tacked” by directly transmitting UV light down the fiber itself.
Laser Grooving Technology Study at Dicing Process in GaN Power Devices WLCSP
Authors: Liu Yao-Hsing , Sun Chia-Wei
Published: August 2021

Chipping free is a dream for GaN Epi wafer sawing process. With current high complexity of wafer technology plus the drive for cost reduction by narrowing the saw street width, it is a challenge which requires huge effort for wafer sawing process to achieve chipping free process. Higher density of metallization causing higher blade loading during mechanical sawing. The critical factors (dicing blade, index speed, spindle speed, cut in depth, test pattern in the saw street, etc.) affecting cutting quality were studied and optimized. This leads to chipping penetrating under the guard ring and damaging the active area [1].
Iridescent Retroreflective Structural Color Based on Micro Concavity Array
Authors: Ko Joo Hwan , Yoo Young Jin , Kim Hyun Myung , Song Young Min
Published: August 2021

We present an iridescent retroreflective structural color based on micro concavity array. Inspired by the hummingbird's dynamic iridescent colors, the ultra-thin resonant layer is introduced for a self-grading structural coloration.
Monolithically integrated laser platform for the mid-infrared
Authors: Wang Ruijun , Wang Zhixin , Gini Emilio , Beck Mattias , Faist Jérôme
Published: August 2021

We present an active-passive monolithic integration platform developed for the mid-infrared spectral range. The monolithically integrated quantum cascade lasers output optical power up to 550 mW in pulsed operation and 100 mW in continuous wave operation.
Optical Nano-Metrology of Sub-Wavelength Objects Enabled by Artificial Intelligence
Authors: Rendón-Barraza Carolina , Chan Eng Aik , Yuan Guanghui , Adamo Giorgio , Pu Tanchao , Zheludev Nikolay I.
Published: August 2021

We experimentally demonstrate that a linear dimension of a sub-wavelength nanoscale object can be measured with an accuracy better that λ/250 by a deep-learning-enabled examination of its diffraction pattern.
Simulating Optical Field Mode Profiles using Artificial Neural Networks for use in Open Source Eigenmode Expansion
Authors: Hammond Ian M. , Hammond Alec M. , Camacho Ryan M.
Published: August 2021

We use artificial neural networks (ANN) to predict the electromagnetic spatial modes of nanophotonic structures, and propose their use to accelerate eigenmode expansion (EME) simulations. A new intuitive open-source EME solver is presented.
Fock State-enhanced Expressivity of Quantum Machine Learning Models
Authors: Gan Beng Yee , Leykam Daniel , Angelakis Dimitris G.
Published: August 2021

We propose quantum classifiers based on encoding classical data onto
Fock states using tunable beam-splitter meshes, similar to the boson
sampling architecture. We show that higher photon numbers enhance the
expressive power of the circuit.
Generation of Sub-megawatt Peak Power Femtosecond Pulses from A 24MHz Cr:forsterite Oscillator
Authors: Hung Hao-Hsuan , Chou Lu-Ting , Chan Chao-Jin , Wen Chao-Hsu , Chia Shih-Hsuan
Published: August 2021

Using a 24-MHz Cr:forsterite oscillator and the precisely controlled fiber-optic nonlinearity, we have simultaneously demonstrated sub-megawatt-peak-power femtosecond pulses at 1.3µm and compressible blue-shifted octave-spanning spectra.
Ultrafast phenomena induced in crystal by one-shot three-dimensional imaging with optical frequency comb
Authors: Kato Takashi , Morito Tamaki , Terada Kazuhiro , Kurata Shintaro , Minoshima Kaoru
Published: August 2021

Using a 15-ps chirped pulse of an optical frequency comb, three-dimensional ultrafast imaging is demonstrated. We captured nm-level phase change associated with the shock-wave propagation in the LiNbO3 crystal by developed all-optical Hilbert transform method.
Near-Infrared Wavelength Selective Absorber in Tamm Plasmon Structure with porous a-Ge
Authors: Kim So Hee , Ko Joo Hwan , Yoo Young Jin , Song Young Min
Published: August 2021

We demonstrate near-infrared Tamm-Plasmon structure (TPs) with single material graded Germanium (Ge). The Ge-based TPs are fabricated with a porosity controllable process and show narrow-band resonance with high tunability.
Towards Training Fault Tolerant and Noise Immune Diffractive Optical Neural Engines
Authors: Panda Soumyashree S. , Hegde Ravi S.
Published: August 2021

We report a novel robust training regimen for Diffractive Optical Networks that uses gradient based regularization terms in the training objective. Enhanced fault tolerance and noise immunity has been observed with models trained with this method.
A Vertically Loaded Diamond Microdisk Resonator (VLDMoRt) towards a Scalable Quantum Network
Authors: Duan Yuqin , Chen Kevin C. , Englund Dirk R. , Trusheim Matthew E.
Published: August 2021

We design and fabricate a vertically loaded diamond microdisk resonator (VLDMoRt) that enhances spin-photon entanglement generation and free-space fiber- matched coupling rate from quantum emitters.
Single-Pixel Image Classification via Nonlinear Optics and Deep Neural Network
Authors: Kumar Santosh , Bu Ting , Zhang He , Huang Irwin , Huang Yu-Ping
Published: August 2021

We propose and experimentally demonstrate a hybrid system which utilizes a nonlinear mode-selective optical method to extract the features with single-pixel detection and subsequently recognize the high-resolution images from a deep neural network.
High-dimensional Energy-time Entanglement Distribution via a Biphoton Frequency Comb
Authors: Chang Kai-Chi , Cheng Xiang , Sarihan Murat Can , Wong Franco N. C. , Shapiro Jeffrey H. , Wong Chee Wei
Published: August 2021

We report the first high-dimensional energy-time entanglement distribution with a singly-resonant biphoton frequency comb, demonstrating time-frequency Franson interferences with high visibility, and establishing a high-dimensional entanglement link.
Amplified spontaneous emission and lasing in photonic time-crystals
Authors: Lyubarov M. , Lumer Y. , Dikopoltsev A. , Lustig E. , Sharabi Y. , Segev M.
Published: August 2021

We find that the spontaneous emission in the momentum bandgap of photonic time-crystals is amplified exponentially by the periodic modulation. When inserted in a resonator - it can give rise to lasing without threshold.
Phase tomography of spontaneously emitted photon-pairs
Authors: Faruque Imad I. , Burridge Ben , Borghi Massimo , Barreto Jorge , Rarity John
Published: August 2021

We have directly measured the joint spectral phase of spontaneously emitted photon-pairs for the first time. We have devised a novel tomographic method using quantum interference of bi-photon functions. This method can potentially be used for quantum sensing.
Ultrafast non-destructive measurement of the quantum state of light with free electrons
Authors: Gorlach Alexey , Karnieli Aviv , Dahan Raphael , Cohen Eliahu , Pe’er Avi , Kaminer Ido
Published: August 2021

We demonstrate that free electrons can be used as ultrafast non-destructive photon detectors. Particularly, we show how one can measure photon statistics, temporal coherence, and implement full quantum state tomography using free electrons.
Observation of Toroidal Light Pulses
Authors: Zdagkas Apostolos , Shen Yijie , Pidishety Shankar , Papasimakis Nikitas , Zheludev Nikolay I. , McDonnell Cormac , Deng Junhong , Li Guixin , Ellenbogen Tal
Published: August 2021

We report on the observation of optical and terahertz non-transverse, non-separable electromagnetic pulses of toroidal topology that are propagating counterparts of the localized toroidal dipoles launched from toroidal emitter metasurfaces excited by conventional laser pulses.
Skyrmionic Supertoroidal Light Pulses
Authors: Shen Yijie , Hou Yaonan , Zdagkas Apostolos , Papasimakis Nikitas , Zheludev Nikolay I.
Published: August 2021

We report that the “Focused Doughnut” introduced by Hellwarth and Nouchi in 1996 is only a single member of an extended family of electromagnetic toroidal pulses with skyrmion topology propagating at the speed of light.
Investigation of a negative next-nearest-neighbor-coupling in evanescently coupled dielectric waveguides
Authors: Schulz Julian , Jörg Christina , von Freymann Georg
Published: August 2021

We experimentally demonstrate a negative NNN-coupling constant, arising naturally in a dielectric waveguide structure, fabricated by direct-laser-writing, and show how we can tune between positive and negative ratios for NN and NNN coupling.
High dimensional frequency-bin entanglement from domain engineered parametric downconversion
Authors: Morrison Christopher , Graffitti Francesco , Ho Joseph , Barrow Peter , Fedrizzi Alessandro
Published: August 2021

We demonstrate the generation of high-dimensional frequency entangled photon pairs using domain engineered parametric down conversion. A natural application of this source would be multi-user quantum key distribution using ITU standard wavelength division multiplexing systems.
Inverse Design of Quantum Holograms in Three-Dimensional Nonlinear Photonic Crystals
Authors: Rozenberg Eyal , Karnieli Aviv , Yesharim Ofir , Trajtenberg-Mills Sivan , Freedman Daniel , Bronstein Alex M. , Arie Ady
Published: August 2021

We introduce a systematic approach for designing 3D nonlinear photonic crystals and pump beams for generating desired quantum correlations between structured photon-pairs. Our model is fully differentiable, allowing accurate and efficient learning and discovery of novel designs.
Control of Second-Harmonic Generation in Dielectric Polaritonic Metasurfaces Using χ(2) Polarity Switching
Authors: Sarma Raktim , Xu Jiaming , de Ceglia Domenico , Klem John , Sinclair Michael , Belkin Mikhail A. , Brener Igal
Published: August 2021

We demonstrate microscopic control of optical nonlinearities in an intersubband polaritonic all-dielectric metasurface comprising of Mie resonators embedded with semiconductor heterostructures. Through heterostructure design, we control the polarity of the resonant χ(2) leading to suppression or enhancement of second-harmonic generation.
Intensity Statistics: a Fingerprint for Waves Evolution in the Diffusion Regime
Authors: Wu Ruitao , Dogariu Aristide
Published: August 2021

We demonstrate that intensity statistics is nonstationary in diffusive regimes of waves in reflection from random media. A statistical model based on recurrent scattering and near field coupling is proposed and confirmed experimentally.
Single-Pixel Machine Vision Using Spectral Encoding Through Diffractive Optical Networks
Authors: Li Jingxi , Mengu Deniz , Yardimci Nezih T. , Luo Yi , Li Xurong , Veli Muhammed , Rivenson Yair , Jarrahi Mona , Ozcan Aydogan
Published: August 2021

We present and experimentally demonstrate a deep learning-driven machine-vision framework that trains diffractive surfaces to encode the spatial information objects into the output power spectrum for all-optical image classification using a single-pixel spectroscopic detector.
High-Performance Quantum Teleportation Systems at Telecom C-Band
Authors: Shen Si , Yuan Chen-Zhi , Zhang Zi-Chang , Wang He-Qing , Li Hao , You Li-Xing , Wang Zhen , Wang You , Deng Guang-Wei , Song Hai-Zhi , Guo Guang-Can , Zhou Qiang
Published: August 2021

Based on performance improved entangled photon pair source at 1.5 µm, we experimentally demonstrated quantum teleportation with the rate and fidelity of 6.41±0.37 Hz and 87.70±5.75% over a state-transfer distance of 40 km.
Coherent frequency-conversion of quantum dot photons to the telecommunication C-band for quantum communication applications
Authors: Graffitti Francesco , Morrison Christopher , Rambach Markus , Koong Zhe Xian , Thorburn Fiona , Ma Y. , Park S. I. , Song J. D. , Kar Ajoy K. , Fedrizzi Alessandro , Gerardot Brian D.
Published: August 2021

We demonstrate frequency-conversion of quantum dot photons to the telecom C-band enabled by a custom-built, tunable mid-infrared laser. We achieve high brightness while preserving the photons’ coherence properties, outperforming state-of-the-art solid-state emitters at telecom wavelengths.
Shaping Spatially Entangled Photons in Real-Time by Classical Control and Feedback
Authors: Lib Ohad , Hasson Giora , Bromberg Yaron
Published: August 2021

We present a method for compensating scattering of spatially entangled photons in real-time, by using feedback from the classical pump beam that stimulates their creation, paving the way for implementing wavefront shaping in quantum communications.
Experimental Bounds on Entangled Two Photon Absorption in Rhodamine 6G
Authors: Landes Tiemo , Allgaier Markus , Merkouche Sofiane , Smith Brian J. , Marcus Andrew H. , Raymer Michael G.
Published: August 2021

Entangled photons have been reported to enhance two-photon absorption by many orders of magnitude. Recent theoretical work predicts smaller increases for common molecular dyes. We present experimental results supporting this claim in Rhodamine 6G.
Zero-dispersion solitons in microresonators with octave-spanning dispersive wave formation
Authors: Anderson Miles , Lihachev Grigory , Weng Wenle , Liu Junqiu , Kippenberg Tobias J.
Published: August 2021

We synthesize an octave-spanning microresonator-based frequency comb, based on a zero-dispersion soliton, existing in the regime of vanishing group-velocity dispersion. The microcomb spans 135 THz, enabled by quasi-phase matched dispersive wave formation.
Continuous-wave electron-photon interactions using chip-based high-Q Si3N4 microresonator
Authors: Raja A. S. , Henke J.-W. , Feist A. , Liu J. , Arend G. , Huang G. , Kappert F. J. , Wang R. N. , Kfir O. , Kippenberg T. J. , Ropers C.
Published: August 2021

We observe CW-driven electron-photon interaction using a fiber-integrated high-Q Si3N4 microresonator, enabled by strong resonantly enhanced coupling with the confined optical mode.
Absorption-Based Diamond Spin Microscopy on a Plasmonic Quantum Metasurface
Authors: Kim Laura , Choi Hyeongrak , Trusheim Matthew E. , Englund Dirk R.
Published: August 2021

We propose a resonant diamond plasmonic metasurface coupled with nitrogen-vacancy ensembles as a quantum imaging surface and report a sensitivity below 1 nT/Hz1/2 per µm2 of sensing area.
Monolithic Bilayer Metasurface for Multicolor Phase-Amplitude Holography
Authors: Huang Xiaoyan , Yu Nanfang
Published: August 2021

We propose a monolithic bilayer metasurface platform for phase-amplitude holograms operating at up to three colors, in both visible and infrared regimes.
The Ballistic Resonance: plasmonic response across IR with III-V semiconductors
Authors: Simmons E. , Muhowski A. , Li K. , Wasserman D. , Podolskiy V.A. , Narimanov E.
Published: August 2021

We analyze the perspectives of the ballistic resonance to enable plasmonic and hyperbolic optical response of doped III-V semiconductors across the infrared frequency range. We demonstrate, experimentally and theoretically, plasmonic structures between 3-5 μn.
A polariton interferometer
Authors: Adhikary Pratik , Mondal Suprodip , and Arif Warsi Laskar , Ghosh Saikat
Published: August 2021

We report a novel interferometer, where two dark-state polaritons, stored in a spin-1 atom, interfere. One can thereby measure both optical and atomic phases, in the form of field polarizations and applied magnetic fields.
Experimental Observation of the Stern Gerlach Effect in Nonlinear Optics
Authors: Yesharim Ofir , Karnieli Aviv , Di Domenico Giuseppe , Trajtenberg-Mills Sivan , Arie Ady
Published: August 2021

The optical analogue of the Stern Gerlach effect is experimentally demonstrated, using the sum frequency generation process, whereby a light beam is deflected into two distinct angles owing to a gradient in the nonlinear coupling.
Nanophotonic Chiral Sensing: How Does it Actually Work?
Authors: Both Steffen , Giessen Harald , Weiss Thomas
Published: August 2021

Nanophotonic chiral sensing has recently attracted a lot of attention; however, a thorough understanding is still missing. We present a general theory that provides deep insight into the underlying interactions.
Diffractive Metagrating Sensor: An Improved Technique for Response Intensification
Authors: Aoni Rifat Ahmmed , Manjunath Shridhar , Karawdeniya Buddini I. , Kamali Khosro Z. , Xu Lei , Rahmani Mohsen , Miroshnichenko Andrey , Neshev Dragomir
Published: August 2021

We propose a novel concept for refractive-index sensing with enhanced sensitivity and robustness to source intensity. The proposed sensor is based on dielectric Huygens’ metagrating and experimentally shows the maximum sensitivity of 616 RIU-1.
Watching In Situ the Hydrogen Diffusion Dynamics in Magnesium on the Nanoscale
Authors: Karst Julian , Sterl Florian , Linnenbank Heiko , Weiss Thomas , Hentschel Mario , Giessen Harald
Published: August 2021

We present a method to image the phase transition from metallic magnesium to dielectric magnesium hydride on the nanometer scale in-situ. This allows to understand and improve the intrinsically limited diffusion kinetics and switching speeds.
Quasibound States in the Continuum for Bidirectional Symmetry-Breaking Nonlinear Metasurfaces
Authors: Zhu Muliang , Li Chentao , Fan Tianren , Abdollahramezani Sajjad , Wu Xi , Harutyunyan Hayk , Adibi Ali
Published: August 2021

We demonstrate an amorphous silicon metasurface featuring quasibound states in the continuum with both co-polarized and cross-polarized symmetry breaking for efficient third harmonic generation.
Nonclassicality Phase-Space Inequalities: Theory and Experiment
Authors: Bohmann Martin , Biagi Nicola , Sperling Jan , Zavatta Alessandro , Bellini Marco , Agudelo Elizabeth
Published: August 2021

We derive phase-space-inequality conditions for the verification of nonclassicality and implement them experimentally. We certify quantum correlations even if the phase-space distributions are nonnegative and demonstrate noise and loss robustness.
All-optical quadrature measurement of over-THz-bandwidth continuous-wave squeezed light
Authors: Kashiwazaki Takahiro , Takanashi Naoto , Inoue Asuka , Kazama Takushi , Enbutsu Koji , Kasahara Ryoichi , Umeki Takeshi , Furusawa Akira
Published: August 2021

We achieved all-optical quadrature measurement of continuous-wave over-3-dB squeezed light at up to 3.7-THz sideband frequencies using LiNbO3-waveguide optical parametric amplifiers, which showed high-gain broadband phase-sensitive amplification. This technique will lead to ultrafast quantum computation.
Experimental Realization of a non-Abelian U(3) Holonomy
Authors: Neef Vera , Pinske Julien , Klauck Friederike , Teuber Lucas , Kremer Mark , Ehrhardt Max , Heinrich Matthias , Scheel Stefan , Szameit Alexander
Published: August 2021

We experimentally realize a U(3) holonomy. By adiabatically propagating quantum states in appropriately designed photonic waveguide systems, we evolve on closed loops within a degenerate subspace of dark states, resulting in a non-Abelian geometric phase.
Encircling of exceptional points with quantum light
Authors: Zhong Q. , Khajavikhan M. , Ozdemir S.K. , El-Ganainy R. , Christodoulides D.N.
Published: August 2021

We investigate how a non-Hermitian photonic system will respond when excited with quantum states of light after dynamically encircling an exceptional point. We find that photon transport is chiral even in the quantum domain.
Polarization-Converting Plasmonic Nanoantennas for Light Absorption Enhancement in Anisotropic 2D Black Phosphorus
Authors: Azar Nima Sefidmooye , Bullock James , Balendhran Sivacarendran , Kim Hyungjin , Javey Ali , Crozier Kenneth B.
Published: August 2021

Optical anisotropy and thinness of 2D black phosphorous (bP) lead to weak light absorption, which limits the performance of bP-based photodetectors. We demonstrate that T-shaped nanoantennas can be integrated with bP to overcome this issue.
Combined inverse-designed metastructure with tunable couplers for forward-scattering computations
Authors: Tzarouchis Dimitrios C. , Nikkhah Vahid , Hoorfar Ahmad , Engheta Nader
Published: August 2021

Here we describe a wave-based computing system for solving forward-scattering problems with arbitrary inputs, utilizing a hybrid network of inverse-designed metastructures and tunable directional couplers.
Training photonic extreme learning machines using feedback alignment
Authors: Kilic Velat , Foster Mark A.
Published: August 2021

Photonic extreme learning machines and reservoir computers enhance machine learning by efficiently mapping data to a high dimensional space. We demonstrate training the input mapping of such approaches using feedback alignment improves performance.
Diffractive Characterization of Sub-wavelength Objects with Machine Learning
Authors: Ghosh Abantika , Roth Diane J. , Nicholls Luke H. , Wardley William P. , Zayats Anatoly , Podolskiy Viktor A.
Published: August 2021

We analyze the limits of a novel machine-learning based technique for characterization of sub-wavelength objects based on their diffractive signatures, achieving theoretical resolution of ~wavelength/25. Experimentally, we demonstrate characterization of 120-nm objects with 850-nm light.
Continuous Variable Cluster State Computation
Authors: Larsen Mikkel V. , Neergaard-Nielsen Jonas S. , Andersen Ulrik L.
Published: August 2021

We demonstrate large-scale cluster state generation for quantum computation. We proceed to implement a universal Gaussian gate set by projective measurement. Finally, we show that fault-tolerant computation is possible with a reasonable squeezing threshold.
Brillouin optomechanics in whispering-gallery-mode microresonators: From strong coupling to single-phonon addition and subtraction
Authors: Enzian Georg , Price John J. , Freisem Lars , Szczykulska Magdalena , Nunn Joshua , Walmsley Ian A. , Silver Jonathan , Del Bino Leonardo , Zhang Shuangyou , Del’Haye Pascal , Janousek Jiri , Buchler Ben C. , Lam Ping Koy , Vanner Michael R.
Published: August 2021

We experimentally explore backward Brillouin scattering with high-frequency acoustic fields for optomechanics applications. We (i) demonstrate strong coupling between the optical and acoustic fields and (ii) perform single-phonon addition and subtraction operations.
Towards Quantum Measurement and Control of a Nanomechanical Resonator at Room Temperature
Authors: Saarinen Sampo A. , Kralj Nenad , Tsaturyan Yeghishe , Langman Eric , Schliesser Albert
Published: August 2021

We present an optomechanical platform that is expected to allow for room-temperature quantum control of a soft-clamped membrane resonator, enabled by the sys-tem’s high quantum cooperativity and low cavity frequency noise.
Double layer photonic crystal membranes in AlGaAs heterostructures for integrated cavity optomechanics
Authors: Manjeshwar Sushanth Kini , Glushkova Anastasiia , Fitzgerald Jamie , Wang Shu Min , Tassin Philippe , Wieczorek Witlef
Published: August 2021

We characterize the opto-mechanical properties of double-layer mechanical devices. These closely spaced photonic crystal membranes can exhibit photonic bound states in the continuum, which could enable the realization of a strongly coupled, integrated op-tomechanical system.
Ultra-coherent fundamental mode mechanical resonators designed using topology optimization
Authors: Høj Dennis , Gao Wenjun , Wang Fengwen , Hoff Ulrich Busk , Sigmund Ole , Andersen Ulrik Lund
Published: August 2021

Topology optimization has been used to optimize the quality factor × frequency product of the fundamental mode of silicon nitride based membranes. A factor of 2.5 enhancement was experimentally demonstrated, showing the potential for topology optimization to revolutionize designs of membranes.
Nonlinear Valley Hall Edge States in Type-II Dirac Lattices
Authors: Zhong Hua , Xia Shiqi , Li Yongdong , Zhang Yiqi , Song Daohong , Liu Chunliang , Chen Zhigang
Published: August 2021

We demonstrate nonlinear valley-Hall edge states (VHESs) in cw-laser-written anisotropic photonic lattices hosting type-II Dirac points. These topological gap quasi-solitons are fundamentally distinct from linear type-I VHESs and from all previously found topological solitons.
Time-resolved second-order correlation measurements of metallic coaxial nanolasers under pulsed optical excitation
Authors: George Agnes , Aadhi A. , Bruhacs Andrew , Ostic Rachel , Whitby Erin , Hayenga William E. , Wang Zhiming M. , Kues Michael , Reimer Christian , Khajavikhan Mercedeh , Morandotti Roberto
Published: August 2021

We report coherent emission behavior of high-β metallic coaxial nanolasers under pulsed illumination conditions. Time-resolved photon statistical measurements show a transition from thermal to coherent emission within the envelope of the excitation pulse.
Electrically tunable quarter waveplate based on intersubband polaritonic metasurfaces
Authors: Chung Hyeongju , Hwang Inyong , Yu Jaeyeon , Demmerle Frederic , Boehm Gerhard , Belkin Mikhail A. , Lee Jongwon
Published: August 2021

We report electrically-tunable quarter waveplate metasurfaces composed of plasmonic gratings coupled to intersubband transitions in multiple-quantum wells. Experimentally, 0.2μm of operating wavelength tuning near 6.4μm wavelength was obtained applying bias voltage from -1V to -3V.
Dynamically Programmable Terahertz Holographic Metasurface using CMOS IC Tiling
Authors: Venkatesh Suresh , Lu Xuyang , Saeidi Hooman , Sengupta Kaushik
Published: August 2021

In this article, we design and demonstrate a multi-functional, digitally programmable metasurface at 0.3 THz fabricated using industry standard 65 nm CMOS (complementary metal oxide semiconductor) process. Each metasurface tile consists of 12×12 periodic array of unit cells and is later tiled to create a 2×2 array. This scalable approach helps to create larger programmable apertures without any overhead on cost and performance. Each unit cell in the metasurface is a programmable multi-split-ring resonator consisting of eight MOSFETs at the capacitive gaps. These transistors act as dynamically programmable digital switches which alter both amplitude and phase transmission properties of the metasurface independently. We experimentally demonstrate multi-functional applications namely, high-speed beam modulation with a switching ON/OFF ratio of ∼25 dB at a maximum clock speed of 5 GHz and beamforming capability of ± 30°. In addition, we also simulate and experimentally verify spatial wavefront manipulation using binary-amplitude-only holography technique at 0.3 THz.
Quantitative sampling of femtosecond THz voltage pulses and hot electron dynamics in an STM junction
Authors: Müller M. , Sabanés N. Martín , Schulz F. , Krecinic F. , Kumagai T. , Kampfrath T. , Wolf M.
Published: August 2021

We demonstrate phase-resolved detection of femtosecond voltage transients in a scanning tunneling microscope induced by ultrabroadband THz pulses from a spintronic emitter, and probe hot electron dynamics inside the photoexcited junction on the nano-femtoscale.
Sub-Cycle Control of Relativistic Plasma Mirror Dynamics
Authors: Ouillé Marie , Kaur Jaismeen , Haessler Stefan , Cheng Zhao , Vernier Aline , Faure Jérôme , Lopez-Martens Rodrigo
Published: August 2021

We report on carrier-envelope phase (CEP) effects on the emission of high-order harmonics and electron beams from plasma mirrors driven by relativistic-intensity near-single-cycle laser pulses at 1 kHz repetition rate.
Application of plasma optics to precision control of laser energy deposition in laser-fusion experiments
Authors: Michel P. , Berger R. L. , Callahan D. A. , Chapman T. , Di Nicola J.-M. , Divol L. , Edwards M. J. , Heebner J. , Landen O. L. , Lemos N. , MacGowan B. J. , Meezan N. B. , Moody J. D. , Ralph J. , Strozzi D. J. , Suter L. J. , Town R. P. J.
Published: August 2021

Self-induced plasma gratings are now routinely used in inertial confinement fusion experiments at the National Ignition Facility (NIF) to achieve precise spatio-temporal control of the laser energy deposition directly inside the fusion targets. This novel capability is enabled by applying a few Å wavelength shifts between different groups of beams, in order to control the direction and level of light scattering off these plasma gratings. A new wavelength tuning capability was added on the NIF in January 2020 to extend the range of applications of plasma gratings; such applications include the control of several asymmetry modes during the implosion, and mitigation of backscatter from stimulated Raman or Brillouin scattering.
Measuring the Optical Properties of Ionization Gratings in Air for Control of Femtosecond Lasers
Authors: Edwards M. R. , Fasano N. M. , Lemos N. , Singh A. , Munirov V. , Kur E. , Wurtele J. S. , Mikhailova J. M. , Michel P.
Published: August 2021

Interference between crossed femtosecond lasers can drive spatially varying ionization, producing a high-flux plasma optic. We measure the plasma and optical properties of an ionization grating in air as it redirects a millijoule-scale probe beam.
Non-reciprocal Thouless pumping in nonparaxial topological photonics
Authors: Cheng Qingqing , Wang Huaiqiang , Ke Yongguan , Pan Yiming
Published: August 2021

We firstly report a non-reciprocal photonic topological Thouless pumping, guided by the nonparaxial field evolution of our well-designed waveguide-array simulator. This non-reciprocal pumping would point us a promising direction such as nonparaxial topological photonics.
Energy-Bandwidth optimization of quantum-enabled communication channels
Authors: Jabir M.V. , Annafianto N. Fajar R. , Burenkov I. A. , Battou A. , Polyakov S. V.
Published: August 2021

We introduce new modulation schemes and experimentally verify that they enhance the accuracy of practical quantum measurements and significantly optimize the combined use of energy and bandwidth for long communication alphabets.
Multimode integrated SU(1,1) interferometer
Authors: Ferreri A. , Santandrea M. , Stefszky M. , Luo K. H. , Herrmann H. , Silberhorn C. , Sharapova P. R.
Published: August 2021

We present a frequency multimode integrated SU (1,1) interferometer with a polarization converter and strong signal-idler photon correlations. Phase sensitivity below the shot noise limit is demonstrated, various filtering and seeding strategies are discussed.
Highly-confined Exciton-polaritons in Monolayer Semiconductors
Authors: Epstein Itai , Koppens Frank H. L.
Published: August 2021

In this work, we predict the existence of a new type of in-plane propagating, highly-confined exciton-polariton, supported by monolayer transition-metal-dicalcogonides (TMDs) in the visible spectrum. This 2D exciton-polariton (2DEP) is a result of the coupling between the electromagnetic light field and collective oscillations of excitons in TMDs. We experimentally show that the conditions required for the excitation of the 2DEP are attainable if the TMD is encapsulated with hexagonal-boron-nitride (hBN) and is cryogenically cooled. In addition, a comparison of the properties of the 2DEP twith those of surface-plasmon-polaritons at the same spectral range reveals that the 2DEP exhibits two orders-of-magnitude larger wavelength confinement.
Transfer of Trionic Coherence upon Femtosecond Hole Relaxation in a Single CdSe/ZnSe Quantum Dot
Authors: Henzler P. , Holtkemper M. , Traum C. , Erbe M. , Reiter D. E. , Kuhn T. , Seletskiy D. V. , Leitenstorfer A.
Published: August 2021

Persistent quantum beats between hot trion states are detected with femtosecond transmission microscopy and manipulated by pump-probe polarizations. Induced absorption into excited biexciton levels reveals transfer of coherence between excited states upon femtosecond hole relaxation.
Time-Domain Integration of Terahertz pulses
Authors: Tomasino Alessandro , Balistreri Giacomo , Dong Junliang , Yurtsever Aycan , Stivala Salvatore , Azaña José , Morandotti Roberto
Published: August 2021

We report on the time-domain integration of terahertz pulses obtained via the tight confinement of the radiation in a tapered two-wire waveguide. Both simulation and experimental results prove the time integration capability of this structure.
Octave-spanning dissipative Kerr soliton frequency comb in an AlN microring resonator
Authors: Weng Haizhong , Liu Jia , Afridi Adnan Ali , Li Jing , Dai Jiangnan , Zhang Yi , Lu Qiaoyin , Donegan John F. , Guo Weihua
Published: August 2021

An octave-spanning Kerr soliton comb (1100-2300 nm) is successfully demonstrated in an AlN microring resonator, with a record single soliton step of ~67 pm (8 GHz), at an on-chip power of 350 mW.
Picometric Ballistic (non-Brownian) Thermal Movements in Photonic Nanostructures
Authors: Liu T. , Ou J. Y. , Macdonald K. F. , Zheludev N. I.
Published: August 2021

Components of photonic nanostructures exhibit picometric thermal movements affecting their optical properties. We report the first observation of ballistic (non-Brownian) thermal motion of a microcantilever, at timescales shorter than those of the erratic Brownian regime.
Triple-Helix Tractor Beam Generation with a Dielectric Metasurface Pancharatnam-Berry Phase Hologram
Authors: Cadusch Jasper , Wen Dandan , Meng Jiajun , Crozier Kenneth B.
Published: August 2021

We present a silicon-based Pancharatnam-Berry (PB) phase metasurface hologram that produces a triple-helix solenoid tractor beam from a Gaussian input beam. Our metasurface has a >90% diffraction efficiency and >75% transmission.
Nonlinear optical response of metal-dielectric nanocavities resonating in the near-infrared
Authors: Zilli Attilio , Isoniemi Tommi , Iarossi Marzia , Finazzi Marco , De Angelis Francesco , Celebrano Michele , Maccaferri Nicolò
Published: August 2021

We study the nonlinear emission of single metal-dielectric nanostructures resonating in the near-infrared. We achieve one order of magnitude higher second-harmonic generation efficiency compared to gold nanostructures with the same geometry and resonant behavior.
Dark-Pulse Dynamics and Directional Switching in Photonic-Crystal Ring Resonators
Authors: Lucas Erwan , Yu Su-Peng , Bush Joseph , Papp Scott B.
Published: August 2021

Microcomb generation under normal dispersion requires an external phase-matching condition, which we fulfill with a photonic crystal (PhC) in a ring resonator. The bidirectional coupling induced by the PhC leads to a non-trivial direction of propagation and breathing of the nonlinear pulse state.
Dark- and Bright-Pulse States in Photonic Crystal Ring Resonators
Authors: Yu Su-Peng , Lucas Erwan , Zang Jizhao , Papp Scott B.
Published: August 2021

Kerr microresonators with normal dispersion support dark- and bright-pulse states, characterized by either locally vanishing or enhanced intensity. We demonstrate that exciting the photonic-crystal resonator defect mode enables continuous tuning between dark and bright solitons.
Optical Metasurfaces for Processing of Amplitude and Phase Images
Authors: Wesemann Lukas , Rickett Jon , Song Jingchao , Davis Timothy J. , Roberts Ann
Published: August 2021

We investigate the utilization of plasmonic resonant waveguide gratings for all-optical image processing in transmission. We experimentally demonstrate edge-detection in amplitude- as well as phase images and contrast enhancement of images of biological samples.
Formation Dynamics and Snapshots of Self-injection-locking Dark Solitons
Authors: HemingWang  , Shen Boqiang , Bao Chengying , Jin Warren , Chang Lin , Leal Mark A. , Feshali Avi , Paniccia Mario , Bowers John E. , Vahala Kerry
Published: August 2021

We propose a model for understanding dark solitons formation dynamics in self-injection-locking laser-resonator systems using dynamical instabilities and domain walls. Snapshots of solitons are captured with dual-comb imaging techniques and validate the model.
Arbitrary control and direct measurement of topological windings of a non-Hermitian band
Authors: Wang Kai , Dutt Avik , Yang Ki Youl , C.Wojcik Casey , Vučković Jelena , Fan Shanhui
Published: August 2021

We experimentally demonstrate controllable nontrivial complex-energy windings of a non-Hermitian band by implementing lattices in a frequency synthetic dimension using a modulated ring resonator and directly measure the complex band structures and winding numbers.
Floquet Harper-Hofstadter Butterflies and non-Hermitian phase transition in quasicrystals
Authors: Kremer Mark , Weidemann Sebastian , Longhi Stefano , MartinWimmer  , Peschel Ulf , Szameit Alexander
Published: August 2021

The non-Hermitian Aubry-André-Harper model exhibits a non-Hermitian phase transition that coincides with a localization transition. We provide a high-resolution measurement of the Butterfly spectrum and propose experiments to measure those transitions, using a photonic lattice.
Nonlinear Topological Pumping with Photons
Authors: Jürgensen Marius , Mukherjee Sebabrata , Rechtsman Mikael
Published: August 2021

We theoretically propose and experimentally demonstrate quantized nonlinear Thouless pumping, despite non-uniform occupation of topological bands; the effect has no analogue in the linear domain. We observe the effect in arrays of coupled waveguides.
Anomalous Floquet Thouless pumping
Authors: Pan Yiming , Dikopoltsev Alex , Lustig Eran , Cheng Qingqing , Segev Mordechai
Published: August 2021

Here, we report a non-adiabatic topological pumping that can adiabatically manipulate anomalous Floquet topological states in a 1D periodically-driven systems. We propose and demonstrate in waveguide array simulations Thouless-like topological pumping of non-adiabatic topological systems.
Phase Tuning of Huygens Metasurfaces by Optical Anisotropy
Authors: Yang Ziwei , Liu Mingkai , Komar Andrei , Xu Lei , Neshev Dragomir N.
Published: August 2021

We demonstrate phase-only tuning of optical metasurfaces in the full 2p-range by controlling the optical anisotropy of their surroundings. The concept is exemplified in a liquid crystal infiltrated metasurface tuned by the temperature and bias-voltage.
Reconfigurable Unpatterned Metasurfaces via Acoustoelectric Gating of Graphene
Authors: Siddiqui Aleem , Jarzembski Amun , Goldflam Michael , Beechem Thomas E.
Published: August 2021

Electric fields in a surface acoustic wave in a piezoelectric substrate can pattern charge in an adjacent graphene film via the acousto-electric effect and thus reconfigure the optical transmission in an unpatterned graphene metasurface.
Giant Electrogyration in a Nanomechanical Metamaterial
Authors: Zhang Qiang , Plum Eric , Ou Jun-Yu , Pi Hailong , Li Junqing , MacDonald Kevin F. , Zheludev Nikolay I.
Published: August 2021

Electrogyration is electric-field-dependent polarization state rotation in chiral media. We demonstrate a metamaterial with a quadratic electrogyration constant of 7.8 × 10-14 rad m2 V-2, which is a million times stronger than in natural materials.
Second-Harmonic Generation Enhancement through Stretching in Patterned Arrays of GaAs Nanowires
Authors: Saerens G. , Bloch E. , Frizyuk K. , Vogler-Neuling V. , Semenova E. , Lebedkina E. , Petrov M. , Grange R. , Timofeeva M.
Published: August 2021

Active tuning of the second-harmonic in patterned arrays of GaAs nanowires is presented. Experimental measurements for a 30% stretchable sample including size’s distribution correlate with simulations. We obtained 2.2 times nonlinear enhancement.
Robust Performance of Superconducting Nanowire Single Photon Detectors under High Magnetic Fields
Authors: Marvinney Claire E. , Pai Yun-Yi , Feldman Matthew A. , Lerner Brian E. , Zhang Jie , Miller Aaron J. , Lawrie Benjamin J.
Published: August 2021

We characterize amorphous superconducting nanowire single photon detectors in magnetic fields of -6T to 6T, enabling integrated quantum devices. We report a substantial anomalous asymmetry in the field dependent response.
Electrically Controlled Graphene Nano-Ribbon Plasmonic Conveyor Belt Network
Authors: Liu Peter Q. , Paul Puspita
Published: August 2021

We present a graphene nano-ribbon based plasmonic conveyor belt network for simultaneous and independent trapping and transportation of multiple nano-objects, which are entirely achieved by electrostatically varying the carrier density distribution in the graphene structures.
Practical Semi-Device-Independent Quantum Random Number Generators
Authors: Avesani Marco , Tebyanian Hamid , Marangon Davide G. , Villoresi Paolo , Vallone Giuseppe
Published: August 2021

We describe a series of works where different Semi-DI protocols for Quantum Random Number generation are proposed and experimentally realized using photonic systems. These protocols exploit both discrete and continuous variables to generate private randomness.
Non-local multifunctional metasurfaces and their external cavity laser application
Authors: Spagele Christina M. , Tamagnone Michele , Kazakov Dmitry , Ossiander Marcus , Piccardo Marco , Capasso Federico
Published: August 2021

We design and experimentally test a new type of non-local metasurfaces allowing multiple independent functions at large deflection angles and we use it to demonstrate external cavity lasers with advanced beam shaping functions.
Quantum Noise Imaging using Quadrature Squeezed Vacuum Optical Fields
Authors: Cuozzo Savannah L. , Prajapati Nikunj , Barge Pratik , Bhusal Narayan , Lee Hwang , Cohen Lior , Novikova Irina , Mikhailov Eugeniy E.
Published: August 2021

We propose imaging techniques that utilized quantum fluctuation a nalysis of a squeezed vacuum field to image opaque objects at low-photon environment. Our method uses a CCD camera-based homodyne detection, allowing noise quadrature selection.
Evolution of Total Angular Momentum and Berry Phase in 3D Structured Light
Authors: Dorrah Ahmed H. , Tamagnone Michele , Rubin Noah A. , Zaidi Aun , Capasso Federico
Published: August 2021

Vector beams can be structured to change their polarization state and topological charge locally with propagation. We report on the observation of Berry phase factor accompanying these transitions and provide a recipe for engineering it on demand.