bluuebunny/crossref_metadata_2025 huggingface dataset:
Plasmonic Metasurfaces for the Near-Field Directional Control of Spontaneous Light Emission
Authors: Wang Xiaowei , Li Yuyu , Toufanian Reyhaneh , Kogos Leonard C. , Dennis Allison , Paiella Roberto
Published: September 2020

We investigate the ability of gradient metasurfaces to promote directional light emission from an ensemble of dipole sources (colloidal quantum dots) in their near field. Well-collimated ouqrut beams along geometrically tunable directions are measured.
Direct temporal mode measurement for the characterization of temporally multiplexed high dimensional entanglement
Authors: Li Xiaoying , Huo Nan , Liu Yuhong , Li Jiamin , Chen Xin , Ou Z. Y.
Published: September 2020

We report a novel method that measures directly the exact form of temporal modes. We then apply the method to a pulse-pumped parametric amplifier and demonstrate telecom band temporally multiplexed multi-dimensional continuous variables quantum entanglement.
Experimental Evidence for the Unruh Effect
Authors: Lynch Morgan H. , Cohen Eliahu , Hadad Yaron , Kaminer Ido
Published: September 2020

We present a theory of radiation in accelerated quantum electrody namics which is manifestly thermalized at the accelerated temperature. Statistical analysis of a recent channeling radiation experiment implies the first observation of the Unruh effect.
Compressive characterization of biphoton frequency spectra
Authors: Simmerman Emma M. , Lu Hsuan-Hao , Weiner Andrew M. , Lukens Joseph M.
Published: September 2020

Frequency-bin qudits constitute a promising tool for quantum information processing. Here we use compressive sensing to characterize the spectral correlations of entangled photon pairs in a quantum frequency comb, obtaining a 26-fold reduction in measurement time compared to raster scanning.
Non-Degenerate Nonlinear Frequency Mixing in (110)-Grown GaAs Nanoresonators
Authors: Weissflog Maximilian A. , Cai Marcus , Parry Matthew , Rahmani Mohsen , Xu Lei , Fedotova Anna N. , Marino Giuseppe , Lysevych Mykhaylo , Tan Hoe , Jagadish Chennupati , Miroshnichenko Andrey , Leo Giuseppe , Sukhorukov Andrey A. , Setzpfandt Frank , Pertsch Thomas , Staude Isabelle , Neshev Dragomir N.
Published: September 2020

We experimentally demonstrate nonlinear frequency mixing of photons with non-degenerate energy and polarization in (110)-grown GaAs nanoresonators. Based on quantum-classical correspondence we predict down-conversion processes allowing for linear, non-degenerate polarization states.
Exceptional points in fiber optomechanics
Authors: Bergman Arik , Duggan Robert , Sharma Kavita , Diamandi Hilel Hagai , Tur Moshe , Zadok Avi , Alù Andrea
Published: September 2020

We report the first realization of an anti-parity-time symmehic optical potential supporting a 2nd- order exceptional point in standard optical fibers. Phase-transition, symmehy-breaking and coalescence of supeimodes are observed when Brillouin optomechanical coupling exceeds the wavenumber-mismatch.
Generation of Broadband Circularly Polarized Deep-Ultraviolet Pulses in Hollow Capillary Fibers
Authors: Lekosiotis Athanasios , Belli Federico , Brahms Christian , Travers John. C.
Published: September 2020

We demonstrate an efficient scheme (> 30%) for the generation of ultra-short circularly polarized pulses in the deep ultraviolet with high energy (> 20 pJ) through seeded four-wave mixing in stretched gas-filled hollow capillary fibers.
Plasmonic Lenses for Ultrafast Electron Nanoemission
Authors: Durham Daniel B. , Riminucci Fabrizio , Kanellopulos Kostas , Loria Silvia Rotta , Ciabattini Filippo , Mostacci Andrea , Minor Andrew M. , Cabrini Stefano , Filippetto Daniele
Published: September 2020

We show the capability of plasmonic lenses for next-generation ultrafast electron sources. Using electromagnetic simulations, we design structures capable of femtosecond, nanoscale electron pulses. Plasmonic properties of template-stripped gold prototypes are characterized using cathodoluminescence spectromicroscopy.
Size dependent absorption and hot electron emission from nanoporous gold
Authors: Petrov Alexander Yu. , Graf Matthias , Arya Mahima , Eich Manfred
Published: September 2020

Nanoporous gold can be tuned in its nanometer feabrre size without a change of porosity volume fraction. This allows studying the change in the optical damping and hot electron photoemission by electron collisions with the surface.
Surface Plasmon Assisted Control of Hot-Electron Relaxation Time
Authors: Memarzadeh Sarvenaz , Kim Jongbum , Aytac Yigit , Murphy Thomas E. , Munday Jeremy N.
Published: September 2020

Using time-resolved reflection measurements in the Kretschmann configuration under fixed absorbed power, we observe a slowing of the hot-electron relaxation in gold films associated with coupling to surface plasmons.
High-resolution Spectrometer with Random Photonic Crystals
Authors: Kodama Takumasa , Hofs Jocelyn , Jin Shengji , Tanabe Takasumi
Published: September 2020

We show that the random localization of light caused by fabrication error can be used to enhance the resolution of a photonic-crystal spectrometer by combining the data with deep learning and a global optimization process.
Electro-optic metamaterial switch based on BaTiO3 nanoparticles
Authors: Karvounis Artemios , Vogler-Neuling Viola , Richter Felix , Grange Rachel
Published: September 2020

We harness the near-field enhancement of plasmonic metamaterials to probe the electrooptic response from 50nm BaTiÜ3 nanoparticles, with low actuation voltage <8V and modulation speeds up to MHz regime, in the near-infrared.
Structurally Tunable Nonlinear Terahertz Metamaterials
Authors: Keiser George R. , Karl Nicholas , Haque Rubiat , Brener Igal , Mittleman Daniel M. , Averitt Richard D.
Published: September 2020

We present a terahertz metamaterial with a nonlinear response, tunable via the relative structural positioning of two stacked resonator arrays. The device consists of two planar arrays of split ring resonators. The first is fabricated on n-doped GaAs and the second array is fabricated vertically above the first using a polyimide spacer layer. Due to GaAs carrier dynamics, the on- resonance terahertz transmission is strongly nonlinear, decreasing by 30% as the incident terahertz power increases. The second resonator layer dampens this nonlinear response. When the two layers are aligned, the total nonlinear modulation of the on-resonance transmission decreases to below 10%. The nonlinear modulation then returns to full strength when the two resonator arrays are shifted laterally away from each other.
Encrypting Information with an All-Dielectric Bistable Metasurface
Authors: Chang Shengyuan , Guo Xuexue , Ni Xingjie
Published: September 2020

We report an all-dielectric metasurface exhibiting strong optical bistable behavior in the near infrared regime. We show that such a metasurface can be used for concealing optical information through the bistable states.
Artificial Generation of Broadband Second Harmonic by Magnetoelectric Coupling in Metamaterial
Authors: Wang Chen , Wen Yongzheng , Sun Jingbo , Zhou Ji
Published: September 2020

We present a broadband second harmonic generation (SHG) by a metamaterial-based artificial nonlinearity. By combining different meta-molecules together, SHG covering 60% wavelength range of the long-wave infrared can be achieved.
Tunable Polarization-independent Absorber Using a Hybrid Plasmonic and Phase-change Chalcogenide Platform
Authors: Hemmatyar Omid , Abdollahramezani Sajjad , Taghinejad Hossein , Adibi Ali
Published: September 2020

Here, we experimentally demonstrate a polarization-independent metasurface (MS) in the near-infrared regime by employing a hybrid plasmonicfphase-change material architecture for non-volatile and wide-band tunable modulation.
Exploring complex graphs with 3D quantum walks of correlated photons
Authors: Ehrhardt Max , Keil Robert , Maczewsky Lukas , Heinrich Matthias , Szameit Alexander
Published: September 2020

We study three-dimensional quantum walks on complex graphs arising from the hybrid action of the spatial and polarization degrees of freedom for single photons in photonic waveguide circuits with tailored birefringence.
Simulating the Quantum Correlations of Structured Photons
Authors: Trajtenberg-Mills Sivan , Karnieli Aviv , Voloch-Bloch Noa , Megidish Eli , Eisenberg Hagai S. , Arie Ady
Published: September 2020

We introduce an efficient, nonperturbative method for calculating the first and second order quantum correlations of down converted photons that recovers experimental results. Our algorithm paves the way towards engineering arbitrarily structured nonclassical light.
Are photons bosons? Measuring the particle exchange phase of photons
Authors: Tschernig Konrad , Smoor Malte , Müller Chris , Kroh Tim , Perez-Leija Armando , Benson Oliver , Busch Kurt
Published: September 2020

It is widely accepted that photons are bosons. To the best of our knowledge, we present the first-ever test of this fundamental assumption of quantum electrodynamics and discuss the influence of experimental imperfections.
Maximal Single-frequency Light-matter Interactions
Authors: Kuang Zeyu , Miller Owen D.
Published: September 2020

We predict upper bounds to light-matter interactions at a given frequency in passive nanophotonic systems. Such bounds set the ultimate limits to the control of light for architectures from nanoparticles to metasurfaces.
Nanoplasmonic |E|4 Enhancement of Molecular Raman Scattering and Electronic Raman Scattering with Spatial Correlation
Authors: Nam Wonil , Zhao Yuming , Zhou Wei
Published: September 2020

By 2D Raman mapping, we observe a spatially correlated linear dependence between molecular Raman scattering (MRS) and electronic Raman scattering (ERS) signals, revealing the same nanoplasmonic |E|4 enhancement factors for both MRS and ERS processes.
Quantitative Fourier Demodulation Analysis of Nanoscale Electromagnetic Fields in Near-field Microscopy
Authors: Huber Markus A. , Mooshammer Fabian , Sandner Fabian , Plankl Markus , Zizlsperger Martin , Huber Rupert
Published: September 2020

We combine a novel Fourier demodulation analysis with numerical simulations of nearfield microscopy. Thereby, we quantify the experimentally inaccessible, nanoscale electric field distributions from which we infer the fundamental limits of the spatial resolution.
Polarization Dependence of Friedric-Wintgen Bound States in the Continuum from THz Metasurfaces
Authors: Kyaw Chan , Yahiaoui Riad , Burrow Joshua A. , Tran Viet , Keelen Kyron , Sims Wesley , Red Eddie C. , Thomas Mikkel A. , Saragan Andrew , Agha Imad , Searles Thomas A.
Published: September 2020

In this experiment, we present a unique method to induce Friedric-Wintgen bound states in the continuum (BIC) also called accidental BIC by rotating a metasurface with asymmetric split ring resonators in the terahertz (THz) regime.
Broadband Linear-to-Circular Polarization Conversion Enabled by Birefringent Reflective Metasurfaces
Authors: Li Dongfang , Chang Chun-Chieh , Zhao Zhexin , Taylor Antoinette J. , Fan Shanhui , Chen Hou-Tong
Published: September 2020

We theoretically proposed and experimentally demonstrated a broadband linear-to- circular polarization converter with up to 80% fractional bandwidth and near unity power conversion efficiency at the terahertz regime.
Opto-thermoelectric Speckle Tweezers
Authors: Kotnala Abhay , Zheng Yuebing
Published: September 2020

We present opto-thermoelectric speckle tweezers based on random thermal speckle field for large-scale trapping of nanoparticles. By integrating it with microfluidic flow, we demonstrate its application as a size-based nanoparticle filtration device.
An Automatic Cell Cyclic Motor in Microfluidics via SelfInduced Back-Action
Authors: Shi Y. Z , Zhang Y. , Yap P. H. , Liu A. Q.
Published: September 2020

We present the first optofluidic cell cyclic motor operated in an asymmetric potential well landscape with four energy states. The cell can continuously cycle between different hotspots inside the microchannel via self-induced back-action effect.
Extreme sensitivity of plasmon drag to surface modification
Authors: Ronurpraful T. , Jerop N. , Koech A. , Thompson K. , Noginova N.
Published: September 2020

Plasmon-induced photocurrents in 1D profile modulated structures switch their polarity in the presence of an additional monolayer at the metal-dielectric interface. The effect presents opportunities for compact plasmonic sensors with electrical detection.
Experimental Demonstration of the Noisy Origins of Soliton Self-Mode Conversion
Authors: Kabagöz Havva Begüm , Antikainen Aku , Ramachandran Siddharth
Published: September 2020

We experimentally demonstrate that solitons generated through the newly discovered phenomenon, soliton self-mode conversion, are purely noise-initiated although they yield record high energy fs pulses that are strictly transform limited.
Machine learning analysis of optical rogue solitons in supercontinuum generation
Authors: Salmela Lauri , Lapre Coraline , Dudley John M. , Genty Goëry
Published: September 2020

We use machine learning techniques to predict the peak intensity and temporal shift of extreme red-shifted rogue solitons in supercontinuum generation from simulated single-shot spectral intensity profiles without any phase information.
High-Energy Infrared Soliton Dynamics in Hollow Capillary Fibres
Authors: Brahms Christian , Belli Federico , Travers John C.
Published: September 2020

We demonstrate soliton self-compression of high-energy 1800 nm laser pulses in hollow capillary fibres. This enables generation of infrared attosecond pulses and few- femtosecond pulses from the deep ultraviolet to the infrared with resonant dispersive wave emission.
Observation of Charge-2 Photonic Weyl Point
Authors: Vaidya Sachin , Noh Jiho , Cerjan Alexander , Rechtsman Mikael C.
Published: September 2020

We present the experimental realization of a charge-2 Weyl point in a low index-contrast (n = 1.52) photonic crystal fabricated using two-photon polymerization and characterized at mid-infrared wavelengths.
Topological Insulator Chalcogenides for Infrared Dielectric Metamaterials
Authors: Krishnamoorthy Harish N. S. , Adamo Giorgio , Yin Jun , Savinov Vassili , Zheludev Nikolay I. , Soci Cesare
Published: September 2020

We show that chalcogenide topological insulators have exceptionally high infrared refractive indices, enabling metamaterials with complex mode structures that could open up pathways to combine dielectric, plasmonic and magnetic metamaterials in a single platform.
Nonlinear Geometric Phase Gradient Metasurfaces beyond the Dipole Approximation
Authors: Gennaro Sylvain D. , Li Yi , Maier Stefan A. , Oulton Rupert F.
Published: September 2020

In this work, we identify the role of higher order antenna’s modes on a metasurface’s Pancharatnam - Berry phase by investigating second harmonic light scattering from two metasurfaces exhibiting dipolar and quadrupolar radiation.
Lithium niobate metasurfaces for second-harmonic generation
Authors: Carletti L. , Zilli A. , Moia F. , Toma A. , Finazzi M. , Celebrano M. , De Angelis C. , Neshev D. N.
Published: September 2020

We demonstrate monolithic lithium niobate metasurfaces for enhanced second- harmonic generation in the visible spectrum. Our approach offers a conversion efficiency above 5*10-5 with applications in novel nonlinear and quantum light sources.
Adaptive bandwidth management for entanglement distribution in a fully-connected fiber-optic network
Authors: Lingaraju Navin B. , Lu Hsuan-Hao , Seshadri Suparna , Leaird Daniel E. , Weiner Andrew M. , Lukens Joseph M.
Published: September 2020

By using wavelength-selective switches to flexibly allocate source bandwidth across multiple users for entanglement distribution over a fiber-optic network, we accommodate both channels with disparate losses and requests for differentiated service.
Entanglement preservation based on classical correlations
Authors: Jones D. E. , Riccardi G. , Kirby B. T. , Antonelli C. , Brodsky M.
Published: September 2020

Entanglement suffers from noise in quantum channels. Noise originating from bit-flip and phase-flip errors has intrinsically different classical correlations. We find that these can be effectively explored when recovering entanglement by procrustean filtering.
Concurrent Quantum State Transfer and Random Channel Sniffing
Authors: Hegazy Salem F. , Obayya Salah S. A. , Saleh Bahaa E. A.
Published: September 2020

Harnessing the interplay between polarization and temporal degrees of freedom, the quantum polarization state of a single photon can be transferred with high fidelity through a polarization-drifting channel whose stochastic parameters are concurrently estimated.
Loophole-Free Test of Einstein-Podolsky-Rosen Steering with One Bit of Faster-than-Light Communication
Authors: Mazurek M. D. , Xiang Y. , Stevens M. J. , Bienfang J. C. , Wayne M. A. , Abellán C. , Amaya W. , Mitchell M. W. , Mirin R. P. , Nam S. W. , He Q. , Shalm L. K. , Wiseman H. M.
Published: September 2020

The communication cost for classically simulating Einstein-Podolsky-Rosen (EPR) steering correlations quantifies their strength. We report a loophole-free demonstration of EPR steering correlations requiring more than one faster-than-light bit to simulate.
Ultrafast Quantum-memory Effects in Carbon Nanotubes
Authors: Jiang Weiwei , Cong Kankan , Anthonio Bryan E. , Noe G. Timothy , Liu Huaping , Kataura Hiromichi , Kono Junichiro , Kira M.
Published: September 2020

Reversible, 200 fs optical switching of carbon nanotubes is demonstrated by utilizing Coulombic many-body effects, strong exciton binding and quantum memory in Coulombic scattering which together eliminate pure dephasing of coherences.
Ultrafast Stimulated Emission Microscopy of Single Nanocrystals
Authors: Piatkowski Lukasz , Accanto Nicolò , Calbris Gaetan , Christodoulou Sotirios , Moreels Iwan , van Hulst Niek F.
Published: September 2020

Single molecule detection is a powerful method used to distinguish different species and to follow time trajectories within the ensemble average. However, such detection capability requires efficient emitters and is prone to photobleaching, while the slow, nanosecond spontaneous emission process only reports on the lowest excited state. We demonstrate direct detection of stimulated emission from individual colloidal nanocrystals at room temperature, while simultaneously recording the depleted spontaneous emission, enabling us to trace the carrier population through the entire photo-cycle. By capturing the femtosecond evolution of the stimulated emission signal, together with the nanosecond fluorescence, we can disentangle the ultrafast charge trajectories in the excited state and determine the populations that experience stimulated emission, spontaneous emission and excited state absorption processes [1].
Electric Field Based Spectrum Control of Deterministic Quantum Emitters in Atomically Thin Semiconductors
Authors: Mukherjee Arunabh , Chakraborty Chitraleema , Qui Liangyu , Vamivakas A. Nick
Published: September 2020

Spectrally tunable quantum emitters (QEs) at predetermined locations can enable scalable quantum technologies. We employ a van-der Waals’ capacitor on nanopillars to deterministically create QEs in monolayer WSe2 and tune their energies by applying electric field.
Intersubband Polaritons and Strong Coupling in Single Nanoantenna Observed by Near-field Microscopy
Authors: Wang Chih-Feng , Habteyes Terefe G. , Luk Ting Shan , Klem John F. , Brener Igal , Chen Hou-Tong , Mitrofanov Oleg
Published: September 2020

Strong coupling of intersubband excitation until recently was observed only in large-scale systems. We demonstrate intersubband polariton formation in an isolated nanoantenna using near-field spectroscopy, enabling investigations of light-matter interaction in the single nanoantenna regime.
Mapping a Nonlinear Response to a Wave Profile
Authors: Jia Pengbo , Li Zhili , Hu Yi , Chen Zhigang , Xu Jingjun
Published: September 2020

We demonstrate theoretically and experimentally, for the first time to our knowledge, that the nonlinear response of a medium can be mapped directly onto a dynamical wave profile governed by a generalized nonlinear Schrödinger equation.
(2+1)D Spatiotemporal Characterization of Nonlinear Interactions between Selectively Excited Spatial Modes of a Few-Mode Fiber
Authors: Dacha Sai Kanth , Murphy Thomas E.
Published: September 2020

We present a novel approach to measure nonlinear interaction between selectively-excited modes of few-mode fibers. S elective e xcitation i s a chieved b y end- facet patterning; spatiotemporal measurements are performed by raster-scanning a nearfield probe coupled to high-speed detection.
Trion Valley Polarization Dynamics in Electrically-gated Monolayer Molybdenum Ditelluride
Authors: Zhang Qiyao , Sun Hao , Tang Jiacheng , Wang Zhen , Dai Xingcan , Ning Cun-Zheng
Published: September 2020

We investigated spin-valley dynamics of excitons and trions in electrically-gated monolayer MoTe2 using helicity-resolved quasi-resonant pump-probe spectroscopy. Trion valley polarization was observed for the first time in MoTe2, with initial polarization degree up to 60%.
Atomic Quantum Memory in the Autler-Townes Regime
Authors: Saglamyurek Erhan , Rastogi Anindya , Hrushevskyi Taras , Smith Benjamin D. , Cooke Logan W. , LeBlanc Lindsay J. , Heshami Khabat
Published: September 2020

Using cold and ultracold rubidium atoms controlled with lasers intense enough to put the system into the Autler-Townes regime, fast, efficient, and broadband storage and manipulation of photonic signals is achieved. In demonstrating single-photon-level operation, signals are read out with exceptionally low-noise, which is inherent to this method. Finally, high efficiency and longer storage times are made possible by using Bose-condensed samples as the storage medium.
Generation of two-mode quantum states of light with timing controllable memories
Authors: Endo Mamoru , Okamoto Fumiya , Matsuyama Mikihisa , Ishizuka Yuya , Hashimoto Yosuke , Sakakibara Rei , Yoshikawa Jun-ichi , van Loock Peter , Furusawa Akira
Published: September 2020

We created and experimentally verified two-mode entangled states of light, α|0,1⟩ + βe*+|1,0⟩, by means of two phase-sensitive optical quantum memories. The release timing of each optical mode can be independently controlled for up to 400 ns.
Routing on quantum repeater networks
Authors: Munro William J. , Nemoto Kae
Published: September 2020

The design of large-scale quantum networks and any future quantum internet will rely on quantum repeaters and how quantum information flows through it. Tasks performed on such networks will go well beyond quantum key distribution and are likely to include quantum remote sensing and distributed quantum computation. In this presentation we will explore the various ways that such networks could be designed to support those advanced tasks. Critical to this will be quantum routing which we should is highly dependent on the repeater architecture. We introduce a quantum quality of service to help characterize the systems performance and shows how it leads interesting network and routing behavior.
Hybrid Quantum Networks for High-Fidelity Entanglement Distribution
Authors: Lee Yuan , Bersin Eric , Dahlberg Axel , Wehner Stephanie , Englund Dirk
Published: September 2020

We present an architecture for multiplexed quantum repeaters using local connectivity to improve fidelity in entanglement distribution. Simulations indicate our scheme achieves rates comparable to competing schemes, with fidelity improvements that increase with repeater size.
On-Chip Synchronization of Kerr Frequency Combs
Authors: Jang Jae K. , Ji Xingchen , Joshi Chaitanya , Okawachi Yoshitomo , Lipson Michal , Gaeta Alexander L.
Published: September 2020

We demonstrate synchronization of two coupled soliton Kerr frequency combs on a single silicon nitride chip. We observe frequency-locking between the two solitons over a large range of comb spacing mismatches up to 2 MHz.
Impact of spatio-temporal thermal decoherence on soliton microcombs in multimode microresonators
Authors: Yang Qi-Fan , Ji Qing-Xin , Wu Lue , Shen Boqiang , Wang Heming , Yuan Zhiquan , Bao Chengying , Gao Maodong , Vahala Kerry
Published: September 2020

The phase noise of the soliton repetition rate is experimentally characterized in silica microresonators. In conjunction with dispersive wave quieting of pump technical noise, spatio-temporal fluctuations of distinct transverse modes set a limit to performance.
Dispersion in Photonic Time Crystals
Authors: Sloan Jamison , Rivera Nicholas , Soljacic Marin
Published: September 2020

We present a framework for predicting the behavior of materials which are simultaneously strongly dispersive and time-dependent. We show that dispersion and time-dependence can cooperate to strongly enhance frequency conversion.
Observation of second-order spectral phase transition in optical parametric oscillator
Authors: Roy Arkadev , Jahani Saman , Langrock Carsten , Fejer Martin , Marandi Alireza
Published: September 2020

We demonstrate second-order phase transition in optical parametric oscillators corresponding to a transition from degenerate to non-degenerate oscillation at a critical cavity detuning which can be utilized for enhanced sensing, and information processing.
On-chip Integrated Spectrometers based on Metasurfaces on Waveguides
Authors: Ding Yimin , Duan Yao , Chen Xi , Guo Xuexue , Ni Xingjie
Published: September 2020

Spectrometers with small footprint and high resolutions are highly demanded in various areas. We designed and experimentally demonstrated an ultra-compact fully integrated spectrometer based on metasurface-decorated photonic integrated waveguides.
Nonlinear Light Generation Driven by Collective Magnetic Modes in Oligomers of Silicon Nanoparticles Excited by Vector Beams
Authors: Kroychuk Maria K. , Shorokhov Alexander S. , Yagudin Damir F. , Smirnova Daria A. , Volkovskaya Irina I. , Shcherbakov Maxim R. , Shvets Gennady , Fedyanin Andrey A.
Published: September 2020

We demonstrated two orders of magnitude enhancement of the third-harmonic intensity for isolated nanoclusters of silicon nanoparticles illuminated by normally incident azimuthally polarized cylindrical vector beams at the wavelength of oligomer’s out-of-plane magnetic mode.
Optical Vortex Scattering in Composite Bessels
Authors: Voitiv Andrew A. , Andersen Jasmine M. , Siemens Mark E. , Lusk Mark T.
Published: September 2020

We theoretically propose and experimentally demonstrate the scattering of optical vortices in a laser beam by superposing Bessel modes. Such processes are mediated by the ephemeral generation and annihilation of vortex pairs.
Surface Acoustic Wave Cavities and InAs Quantum Dots for Quantum Transduction
Authors: Autry T. M. , Berweger S. , Sletten L. , Mirin R. P. , Kabos P. , Lehnert K. , Silverman K.L.
Published: September 2020

We demonstrate progress in developing a new microwave-optical quantum transducer. We demonstrate focusing and stable surface acoustic wave cavities at 3.4 GHz and characterize the acoustic performance. This work is a contribution of the National Institute of Standards and Technology; not subject to copyright in the United States of America.
Directivity Modulation of Monolayer WS2 Emission by Single Hydrogenated Amorphous Silicon Nanospheres
Authors: Fang Jie , Wang Mingsong , Yao Kan , Zheng Yuebing
Published: September 2020

Monolayer WS2 emission is limited by its poor emission directivity. We introduce single hydrogenated amorphous silicon nanospheres (a-Si:H NSs) to realize on-demand directivity modulation. We demonstrate the active control of forward-to-backward modulation ratio via tuning the radius of a-Si:H NSs.
Experimental demonstration of non-symmetric diffusion via spatiotemporal metamaterials
Authors: Camacho Miguel , Edwards Brian , Engheta Nader
Published: September 2020

Spatiotemporal variation of material parameters (capacity and conductivity) can lead to unconventional diffusion phenomena. We have constructed and tested a metamaterial consisting of spatiotemporally variable capacitors and switches, demonstrating highly asymmetric charge diffusion and accumulation.
Frequency Conversion in a Dielectric Time-Variant Metasurface via Optical Pumping
Authors: Karl Nicholas , Vabishchevich Polina P. , Shcherbakov Maxim R. , Liu Sheng , Sinclair Michael B. , Keeler Gordon A. , Peake Gregory M. , Shvets Gennady , Brener Igal
Published: September 2020

We experimentally observe frequency conversion via electromagnetic wave interaction with a high quality-factor resonance in an array of resonators whose refractive indices are varied on an ultrafast timescale. Further, we describe the observations using coupled-mode-theory.
Realizing Spin-Hamiltonians in Nanolaser Lattices
Authors: Parto M. , Hayenga W. , Marandi A. , Christodoulides D. N. , Khajavikhan M.
Published: September 2020

We demonstrate both theoretically and experimentally that coupled metallic nanolasers can be used to emulate spin-Hamiltonians. Depending on the geometry of the array, we observe ferromagnetic and antiferromagnetic behaviors, as well as geometric frustration.
Non-Hermitian Anderson Transport
Authors: Weidemann Sebastian , Kremer Mark , Longhi Stefano , Szameit Alexander
Published: September 2020

We predict and experimentally verify a novel non-Hermitian transport mechanism in which a stochastic energy exchange with the environment leads to localization of all eigenstates, while simultaneously enabling particles to travel via ultra-far jumps.
On-Chip Squeezed-State Generation via Dual-Pumped Four-Wave Mixing
Authors: Zhao Yun , Okawachi Yoshitomo , Jang Jae K. , Ji Xingchen , Lipson Michal , Gaeta Alexander L.
Published: September 2020

We experimentally demonstrate on-chip generation of quadrature squeezed light with a loss-corrected squeezing level of 3.1 dB. This technology provides a light source solution for photonics based large-scale continuous-variable quantum information processing.
Scalable squeezed light source for continuous variable quantum sampling
Authors: Vernon Z , Quesada N. , Liscidini M , Morrison B , Menotti M , Tan K , Sipe JE
Published: September 2020

We propose a squeezed light source meeting the stringent requirements of continuous variable quantum sampling. With typical parameters, squeezed states with mean photon number of 10 or higher can be generated at repetition rates of over 100MHz.
Measuring the Diamond strain Tensor with Silicon-Vacancy Centers
Authors: Bates Kelsey M. , Day Matthew W. , Smallwood Christopher L. , Ulbricht Ronald , Autry Travis M. , Owen Rachel C. , Diederich Geoffrey , Schröder Tim , Bielejec Edward , Siemens Mark E. , Cundiff Steven T.
Published: September 2020

We use two coherent spectroscopy techniques to measure the strain tensor local to an ensemble of silicon-vacancy centers in diamond. Our results provide a possible pathway for using diamond as a tensorial strain gauge.
Unveiling Emitter Wavefunction Size via the Quantum Coherence of its Radiation
Authors: Karnieli Aviv , Rivera Nicholas , Arie Ady , Kaminer Ido
Published: September 2020

We sttudy the fundamental influence of an emitter's wavefunction on the coherence of its electromagnetic radiation. Our findings allow for a new method to measure the wavefunction dimensions of charged quanttum particles.
Quantum Walk with Coherent Uncertainty in Electron-Laser Interaction
Authors: Reinhardt Ori , Tsesses Shai , Shentcis Michael , Wang Kangpeng , Nehemia Saar , Dahan Raphael , Kaminer Ido
Published: September 2020

We show that pulsed laser-driven free electrons undergo quantum walk with coherent uncertainty in the electron energy levels, characterized by their spread. We study this quantum walk experimentally and develop its analytic theory.
Spin-orbit interaction of light in plasmonic lattices: modified and broken angular momentum conservation
Authors: Tsesses Shai , Cohen Kobi , Ostrovsky Evgeny , Gjonaj Bergin , Bucher Tomer , Sapir Shay , Bartal Guy
Published: September 2020

We show how the spin-orbit interaction of light in systems with non-circular symmetry changes optical angular momentum conservation, or even completely breaks it. We demonstrate our claims through phase-resolved near-field measurements and optical force calculations.
Optical Thouless Conductance in Anderson Localizing Systems
Authors: Mondal Sandip , Kumar Randhir , Kamp Martin , Mujumdar Sushil
Published: September 2020

A non-intuitive combination of near-Wigner Dyson spacing statistics and lognormal conductance distribution is measured in a two-dimensional finite-sized Anderson localizing system. Theoretical analysis uncovers a novel nonlinear connection between repulsion exponent and localization length.
An Integrated Quantum Light Source of Frequency Degenerate Polarization Entangled Bell States
Authors: Yu Lingjie , Zheng Jingyuan , Liu Xu , Huang Yidong , Zhang Wei
Published: September 2020

An integrated quantum light source of telecom band polarization entangled Bell state generation is proposed and demonstrated on a SOI chip. Its output state can be switched between two frequency-degenerate Bell states.
Emission of Time-Energy Entangled Photon Pairs by a Self-Pumped Silicon Microresonator
Authors: Garrisi Francesco , Sabattoli Federico Andrea , Sam Savda , Barone Andrea , Bergamasco Nicola , Massara Micol Previde , Morichetti Francesco , Melloni Andrea , Pirzio Federico , Liscidini Marco , Galli Matteo , Bajoni Daniele
Published: September 2020

We demonstrate emission of photon pairs from a Silicon integrated microres onator under electrical self-pumping. By controlling excitation conditions, the photon pairs are time-energy entangled, with fringe visibility in a Franson experiment of 93.9% ± 0.9%.
A Fast Photon-Interface Using a Fiber-Based Atom-Cavity System
Authors: Pandey Deepak , Uruüuela Eduardo , Ahlheit Lukas , Ammenwerth Maximilian , Malik Pooja , Macha Tobias , Pfeifer Hannes , Alt Wolfgang , Meschede Dieter
Published: September 2020

Using a cavity assisted two-photon Raman process, we demonstrate the deterministic generation and storage of fast photons (pulse width < atomic excited-state lifetime) in an atomic system coupled to a high-bandwidth cavity (k > 7).
Resonant Wavefront-Shaping Metasurfaces Based on QuasiBound States in the Continuum
Authors: Malek Stephanie C. , Overvig Adam C. , Shrestha Sajan , Yu Nanfang
Published: September 2020

We experimentally demonstrate dielectric metasurfaces that support spatially tailored dark modes (quasi-Bound States in the Continuum) and mold optical wavefronts only at narrowband Fano resonances, while leaving the rest of the spectrum unaffected.
Topological Haldane Lattice
Authors: Liu Yuzhou G. N. , Jung Pawel , Parto Midya , Hayenga William E. , Christodoulides Demetrios N. , Khajavikhan Mercedeh
Published: September 2020

We report on the first demonstration of a topological Haldane lattice in a photonic setting using active microring structures.
Focusing on Bandwidth: Achromatic Metalens Limits
Authors: Presutti Federico , Monticone Francesco
Published: September 2020

We derive fundamental bandwidth limits on achromatic optical metalenses, regardless of their implementation. Specifically, we discuss the product between achievable time delay and bandwidth, and apply well-established bounds on this product to a general focusing system.
Inverse Designed Shape-Reconfigurable Multifunctional Photonics
Authors: Camayd-Muñoz Philip , Roberts Gregory , Ballew Conner , Debbas Max , Faraon Andrei
Published: September 2020

In this work, we design multifunctional nanophotonic devices with drastically switchable properties upon simple mechanical transformations. Inverse design for photonic and mechanical metamaterials can be combined to simultaneously optimize custom multifunctionality in both domains.
Achromatic Metalenses Based on Inverse-Designed Random Meta-Atoms
Authors: Zhang Xiaojie , Huang Haiyang , Guo Xuexue , Ni Xingjie
Published: September 2020

We present a new type of achromatic metalenses consisting of inversely designed random-shaped meta-atoms. The inverse design algorithm makes the designs not limited to human cognitive capabilities.
Beam steering metasurfaces via inverse design
Authors: Chung Haejun , Miller Owen D.
Published: September 2020

We numerically demonstrate state-of-the-art beam steering metasurface via inverse design, which show tunable steering angles ranging from 12° to 144°and switching efficiencies above 80%.
Epitaxial Rare-Earth on Silicon as a Scalable Quantum Photonic Platform
Authors: Huang Yizhong , Singh Manish K. , Fukumori Rikuto , Tomm Natasha , Wicker Christina , Prakash Abhinav , Rajh Tijana , Warburton Richard J. , Guha Supratik , Zhong Tian
Published: September 2020

We present an epitaxial Er3+:Y2O3/silicon material platform for scalable quantum photonic devices. We discuss a system integrating suspended Er3+:Y2O3 membranes with a fiber Fabry-Perot cavity for coherent spectroscopy enabling quantum memory and transduction.
Polarimetry of a Single-Order Circularly Polarized High Harmonic Separated by a Time-Delay Compensated Monochromator
Authors: Ito Kengo , Haraguchi Eisuke , Kaneshima Keisuke , Sekikawa Taro
Published: September 2020

Polarization of single-order circularly polarized high harmonic is characterized after the separation by a time-delay compensated monochromator. The ellipticity introduced by the anisotropy of the toroidal gratings in diffraction is evaluated.
Mixed Eletro-optic Metasurface with a Hybrid Plasmonic-phase-change Material Architecture
Authors: Hemmatyar Omid , Abdollahramezani Sajjad , Taghinejad Hossein , Adibi Ali
Published: September 2020

We demonstrate an electro-optically reconfigurable hybrid metasurface platform formed by integration of plasmonic nanostructures with phase-change materials to effectively modulate the incident light over a broad range of wavelengths in the telecommunication window.
Electrically programmable phased-array antenna using phase-change materials
Authors: Abdollahramezani Sajjad , Kiarashinejad Yashar , Hemmatyar Omid , Zandehshavar Mohammadreza , Adibi Ali
Published: September 2020

We present an electrically tunable metasurface as an optical phased array antenna by employing a deep learning approach to intelligently design hybrid phase- change/plasmonic materials-based meta-atoms spatially adding 0 and n phase-shift while minimizing reflectance variation.
Optical Skyrmions and a Topological Hall Effect in Artificial Gauge Fields
Authors: Karnieli Aviv , Tsesses Shai , Bartal Guy , Arie Ady
Published: September 2020

We construct skyrmion textures in a synthetic spin-1/2 dimension using nonlinear photonic crystals, giving rise to artificial gauge fields: a magnetic field, mimicking the topological Hall effect, and an electric field unique to our system.
Observation of Topological Band Gap Solitons
Authors: Mukherjee Sebabrata , Rechtsman Mikael C.
Published: September 2020

We present the first experimental observation of solitons in the bulk of a photonic Floquet topological insulator. We probe a family of these nonlinear states residing on the topological band gap and performing cyclotron-like orbits.
A Single Mode Optical Cavity Containing Four (up to 1000) Independent Spin Waves
Authors: Cox Kevin C. , Castillo Zachary A. , Meyer David H. , Kunz Paul D.
Published: September 2020

We present an experimental scheme for many-body quantum-electrodynamics by multiplexing of cavity-coupled spin-wave excitations. We experimentally observe the core phenomena and point the way toward creating many-body entanglement in a test-bed quantum network.
Quantum phase synchronization and blockade in spin-1 system
Authors: Adhikary Pratik , Laskar Arif Warsi , Mondal Suprodip , Katiyar Parag , Vinjanampathy Sai , Ghosh Saikat
Published: September 2020

We report observation of quantum phase synchronization of spin-1 atoms, with the relative phase getting entrained with external drive phases in presence of anisotropic decay channels.
Quantum Enhancement of Optical Measurements using Four-wave Mixing in Rb vapor
Authors: Novikova Irina , Prajapati Nikunj , Cuozzo Savannah L. , Matekole Elisha S. , Cohen Lior , Dowling Jonathan P. , Mikhailov Eugeniy E.
Published: September 2020

Using four-wave mixing in hot Rb vapor, we demonstrate the production of two-mode intensity squeezing between beams with significantly different optical angular momenta and an all-optical polarization-based truncated SU(1,1) interferometer for alloptical quantum-enhanced imaging and sensing.
Interferometric Control of Photo-Chemical Reactions in 87Rb Bose-Einstein Condensates
Authors: Kondakci H. Esat , Blasing David B. , Li Chuan-Hsun , Chen Yong P.
Published: September 2020

We report on an interferometric control of photo-chemical reactions in 87Rb condensates, where the scattering channels behaves as if the arms of an interferometer. We control the relative phase between the scattering channels by exploiting the quadratic Zeeman shift at low magnetic field strengths.
A Robust Scaling Up Method of Output Energy and Photon Energy on High-Order Harmonic Generation: Towards Sub-pJ Water Window Soft X-rays
Authors: Nishimura Kotaro , Xu Lu , Suda Akira , Midorikawa Katsumi , Fu Yuxi , Takahashi Eiji J.
Published: September 2020

Nano-joule class water-window high-order harmonic generation under a neutralmedium condition is presented. The maximum harmonic photon energy reaches 360 eV with 3.5-nJ/shot in the water-window region.
Compressed single-pixel photoacoustic imaging
Authors: Guo Yuning , Li Baowen , Yin Xiaobo
Published: September 2020

Taking advantage of single-pixel detection, we present compressed photoacoustic imaging with spatial resolution unlimited by acoustics. It allows surface tomography in optically diffusive media and enables sub-wavelength structures resolvable with a reduced measurement demand.
Cascaded Multifunctional Metasurfaces for Single-shot Quantitative Phase Gradient Microscopy
Authors: Kwon Hyounghan , Arbabi Ehsan , Kamali Seyedeh Mahsa , Faraji-Dana MohammadSadegh , Faraon Andrei
Published: September 2020

We experimentally demonstrate a single-shot quantitative phase gradient microscope by two cascaded multifunctional metasurfaces. Experiments with various specimens show the capability to capture quantitative phase gradient images with single-cell resolution and low noise levels.
Full field-of-view imaging through scattering media beyond optical memory effect using modulated illumination and independent component analysis
Authors: Li Wei , Liu Jietao , He Shunfu , Xia Mingrui , Wu Yuxiang , Zhu Jinjin , Liu Lixian , Shao Xiaopeng
Published: September 2020

We experimentally demonstrate full field-of-view optical imaging through scattering regardless of the optical memory effect utilizing designed modulated illumination and independent component analysis. High-fidelity imaging of large field-of-view multi-objects is achieved numerically and experimentally.
3D computational cannula fluorescence microscopy enabled by artificial neural networks
Authors: Guo Ruipeng , Pan Zhimeng , Taibi Andrew , Shepherd Jason , Menon Rajesh
Published: September 2020

Computational cannula microscopy (CCM) is a high-resolution widefield fluorescence imaging approach deep inside tissue, which is minimally invasive. Rather than using conventional lenses, a surgical cannula acts as a lightpipe for both excitation and fluorescence emission, where computational methods are used for image visualization. Here, we enhance CCM with artificial neural networks to enable 3D imaging of cultured neurons and fluorescent beads, the latter inside a volumetric phantom. We experimentally demonstrate transverse resolution of ∼6µm, field of view ∼200µm and axial sectioning of ∼50µm for depths down to ∼700µm, all achieved with computation time of ∼3ms/frame on a desktop computer.
Sharp resonances in terahertz free-standing three-dimensional metallic woven meshes
Authors: Liu Dejun , Hattori Toshiaki
Published: September 2020

Free-standing structures that do not require any holder or substrate show high levels of flexibility and stretchability and hence are well-suited for THz applications. In this work, a free-standing three-dimensional metallic woven mesh is experimentally and numerically investigated at terahertz frequencies. Such mesh fabricated by weaving techniques exhibits sharp Fano-like resonances, which has not been found in previous studies. Investigation results indicate that the high Q resonances originate from the bending effect in bent wires, which can be termed as Wood’s anomalies. The resonance field longitudinally covers the input and output end faces of the woven mesh, thereby obtaining a large field volume. These properties in this kind of meshes are well suited for wave manipulation and biomolecular sensing in the terahertz regime.
Design of a multi-modality DMD-based two-photon microscope system
Authors: Chen Dihan , Ren Mindan , Zhang Dapeng , Chen Jialong , Gu Songyun , Chen Shih-Chi
Published: September 2020

We present the modular design and characterization of a multi-modality video-rate two-photon excitation (TPE) microscope based on integrating a digital micromirror device (DMD), which functions as an ultrafast beam shaper and random-access scanner, with a pair of galvanometric scanners. The TPE microscope system realizes a suite of new imaging functionalities, including (1) multi-layer imaging with 3D programmable imaging planes, (2) DMD-based wavefront correction, and (3) multi-focus optical stimulation (up to 22.7 kHz) with simultaneous TPE imaging, all in real-time. We also report the detailed optomechanical design and software development that achieves high level system automation. To verify the performance of different microscope functions, we have devised and performed imaging experiments on Drosophila brain, mouse kidney and human stem cells. The results not only show improved imaging resolution and depths via the DMD-based adaptive optics, but also demonstrate fast multi-focus stimulation for the first time. With the new imaging capabilities, e.g., tools for optogenetics, the multi-modality TPE microscope may play a critical role in the applications pertinent to neuroscience and biophotonics.
Designing freeform imaging systems based on reinforcement learning
Authors: Yang Tong , Cheng Dewen , Wang Yongtian
Published: September 2020

The design of complex freeform imaging systems with advanced system specification is often a tedious task that requires extensive human effort. In addition, the lack of design experience or expertise that result from the complex and uncertain nature of freeform optics, in addition to the limited history of usage, also contributes to the design difficulty. In this paper, we propose a design framework of freeform imaging systems using reinforcement learning. A trial-and-error method employing different design routes that use a successive optimization process is applied in different episodes under an ε-greedy policy. An “exploitation-exploration, evaluation and back-up” approach is used to interact with the environment and discover optimal policies. Design results with good imaging performance and related design routes can be found automatically. The design experience can be further summarized using the obtained data directly or through other methods such as clustering-based machine learning. The experience offers valuable insight for completing other related design tasks. Human effort can be significantly reduced in both the design process and the tedious process of summarizing experience. This design framework can be integrated into optical design software and runs nonstop in the background or on servers to complete design tasks and acquire experience automatically for various types of systems.