bluuebunny/crossref_metadata_2025 huggingface dataset:
Time-dependent Side Channels in Quantum Key Distribution
Authors: Gnanapandithan Amita , Bourassa Eli , Qian Li , Lo Hoi-Kwong
Published: August 2021

Time-dependent side channels pose a security risk for quantum key distribution (QKD). We apply a numerical security proof technique to study such a side-channel, which we identify in a common source implementation for measurement-device-independent QKD employing Faraday mirrors.
Measurements of Nonlinear Thomson Scattering Radiation Patterns from Elliptical Light with Polarization Resolution
Authors: Fruhling Colton , Schulzke Christoph , Romero Mahonri , Wang Junzhi , Ware Michael , Peatross Justin , Umstadter Donald
Published: August 2021

Measurements of first and second harmonic radiation from nonlinear Thom- son scattered light as a function of laser polarization ellipticity are reported. Polarization-resolved patterns were observed and connected to the underlying electron motion, confirming half-century old theoretical predictions.
Room-temperature Near-infrared Electroluminescence in n-type GaAs Unipolar microLEDs
Authors: Jacob Bejoys , Borme Jérôme , Figueiredo José M. L. , Romeira Bruno
Published: August 2021

We report the first observation of pronounced light emission (~806 nm) from the active AlAs/GaAs/AlAs double barrier quantum well of unipolar (electron-transporting) microLEDs. This paves the way for a new class of n-type optoelectronic micro-nanodevices.
Computer Generated Holograms for In-vivo Optogenetic Neural Stimulation
Authors: Tsakas Anastasios , Ampeliotis Dimitris , Alexandropoulos Dimitris
Published: August 2021

A novel design method for the in-vivo optogenetic photostimulation of neurons is presented. The method accounts for the brain tissue scattering effects for the holographic illumination of neurons.
Machine Learning Assisted Management of Photonic Switching Systems
Authors: Khan Ihtesham , Masood M Umar , Tunesi Lorenzo , Bardella Paolo , Ghillino Enrico , Carena Andrea , Curri Vittorio
Published: August 2021

We propose a machine learning based approach to predict control signals for a photonic switching system. This solution is topology and technology agnostic and it can be employed in real-time switch control planes.
Echoes in a Single Quantum Kerr-nonlinear Oscillatora
Authors: Tutunnikov I. , Rajitha K. V. , Averbukh I. Sh.
Published: August 2021

We theoretically study the echo phenomenon in a single impulsively excited (“kicked”) Kerr-nonlinear oscillator. These echoes may be useful for studying decoherence processes in a number of systems related to quantum information processing.
Dipolar interactions in bilayers of indirect excitons
Authors: Choksy D. J. , Xu Chao , Fogler M. M. , Butov L. V. , Norman J. , Gossard A. C.
Published: August 2021

We studied both experimentally and theoretically attractive dipolar interaction in bilayers of indirect excitons (IXs) with built-in dipole moments and found monotonic IX energy reduction with density and spatial attraction between IX clouds.
Demonstration of corner states in photonic square-root higher-order topological insulators
Authors: Yan Wenchao , Xia Shiqi , Liu Xiuying , Xie Yuqing , Tang Liqin , Song Daohong , Xu Jingjun , Chen Zhigang
Published: August 2021

We experimentally demonstrate the square-root higher-order topological insulators, unveiling two kinds of corner states that reside in different band gaps of a photonic super-honeycomb lattice established with photorefractive cw-laser-writing.
Generation of Spatiotemporal Optical Vortex with Partial Temporal Coherence
Authors: Zang Yimin , Mirando Amal , Chong Andy
Published: August 2021

We demonstrate both theoretically and experimentally, the generation of spatiotemporal optical vortices using a light source with partial temporal coherence, which could serve as a cheaper source for generating such vortices.
Managing backscattering noise in Sagnac-loop twin-field quantum key distribution
Authors: Mandil Reem , Qian Li , Lo Hoi-Kwong
Published: August 2021

We propose a signal patterning technique to mitigate backscattering and optimize secure key rates for Sagnac twin-field QKD systems. Simulation results based on experimentally-measured backscattering coefficient yield positive key rates for 250km using APD detectors.
Twisted Bilayer Dielectric Photonic Crystal Slabs
Authors: Tang Haoning , Du Fan , Carr Stephen , DeVault Clayton , Mazur Eric
Published: August 2021

We design twisted bilayer photonic crystal slabs that introduce Moiré flat-bands and localized modes. The flat-bands have a quality factor of 106 and a high density-of-states of 0.967 THz−1m−2.
Stress tuning and enhancement of optical nonlinearity in an organic crystal
Authors: Moroshkin Peter , Nagar Akshay , Yu Meng-Ju , Cai Bin , Xu Jimmy
Published: August 2021

χ(2) is critical to applications, but its value is material-limited. We report on stress tuning and dramatical enhancement of χ(2) in an organic crystal, harvesting the molecular deformation and charge redistribution associated with its plasticity.
Infinite asymptotic degeneracy and subwavelength three-dimensional far-field localization in spherical structures
Authors: Farhi Asaf
Published: August 2021

We show that spherical structures exhibit an infinite-asymptotic- eigenpermittivity degeneracy. We then consider the possibility that the time reversal of the field emitted by atomic/molecular-transition current will spatially correlate with it, leading to strong light-matter interaction.
Controlled Phase Gate of Spin Qubits in Two Quantum-Dot Single-Photon Emitters
Authors: Kim Juhyeon , Croft Zachary , Steel Duncan , Ku Pei-Cheng
Published: August 2021

We show that a controlled phase gate on two laterally positioned quantum dots can be achieved using the long-range Coulomb coupling. The permanent dipole moment in piezoelectric quantum dots can significantly enhance the coupling.
Maximizing the Efficiency of χ(2) Processes in Microresonators
Authors: Zhao Yun , Jang Jae K. , Okawachi Yoshitomo , Gaeta Alexander L.
Published: August 2021

We perform a study of conversion efficiency in microresonator-based second-harmonic and difference-frequency generation. High conversion efficiencies can be achieved only at specified pump power and detunings and perfect phase matching is not a necessary condition.
Analytical Expression of Raman Induced Soliton Self- Frequency Shift
Authors: Kormokar Robi , Shamim Md Hosne Mobarok , Rochette Martin
Published: August 2021

We derive an analytical expression that predicts the Raman-induced frequency shift experienced by a soliton. By including fiber losses, dispersion slope, and self-steepening, the resulting expression is a high-order extension of Gordon’s formula.
Pulsewidth Dependence of the Effective Nonlinear Refractive Index of Air in the Atmosphere
Authors: Munera Natalia , Tofighi Salimeh , Hagan David J. , Van Stryland Eric
Published: August 2021

The ultrafast response function of air is used to predict the pulsewidth dependence of 2,
ff
from our measurements in the near and mid-infrared. We predict 2,
ff
in the atmosphere, showing agreement with multiple literature measurements.
Nonlinear optical properties of functionalized aza- borondipyrromethene chromophores
Authors: Chang Hao-Jung , Bondar Mykhailo V. , David Sylvain , Maury Oliver , Berginc Gerard , Andraud Chantal , Hagan David J. , Van Stryland Eric W.
Published: August 2021

We report the nonlinear-optical properties of functionalized aza-borondipyrromethene chromophores in the near infrared. The fluorescence efficiencies are low, and they exhibit excited- state absorption and two-photon absorption at these wavelengths.
Critical Coupling of a Single Metallic Nanoantenna under Focused Illumination
Authors: Gennaro Sylvain D. , Roschuk Tyler , Maier Stefan A. , Oulton Rupert F.
Published: August 2021

In this work, we investigate the critical coupling of a single gold disk antenna with a focused beam by evaluating its absorption and scattering using spectral interferometry microcopy.
Tailoring the Multipolar Content at Tight Focus Using Cylindrical Vector Beams with Orbital Angular Momentum
Authors: Heffernan Brendan M. , Xu Bo , Bae Kyuyoung , Siemens Mark E. , Park Wounjhang , Gopinath Juliet T.
Published: August 2021

We demonstrate that the polarization and phase degrees of freedom of paraxial laser beams can be used to tailor their multipolar content under tight-focusing conditions. This has applications in controlling the scattering conditions from particles.
Electrically-driven linear optical isolation in a lithium niobate nanophotonic platform
Authors: Sohn Donggyu B , Örsel Oğulcan E. , Bahl Gaurav
Published: August 2021

We experimentally demonstrate magnet-less linear optical isolation enabled via acousto- optic interaction in a lithium niobate nanophotonic platform. The system leverages non-reciprocal mode splitting of optical modes in a ring resonator induced by traveling acoustic waves.
Monolithic Indium Phosphide Dual Laser Photonic Integrated Circuit for Remote Sensing Lidar
Authors: Fridlander Joseph , Sang Fengqiao , Rosborough Victoria , Brunelli Simone Tommaso Šuran , Chen Jeffrey , Numata Kenji , Kawa Stephan , Stephen Mark , Coldren Larry , Klamkin Jonathan
Published: August 2021

A dual laser indium phosphide photonic integrated circuit for remote sensing lidar was realized. A twentyfold improvement in the long-term frequency stability of the master laser was demonstrated using an on-chip phase modulator.
An Optical Parametric Amplifier for seeding femtosecond Fe:ZnSe lasers at 4.1 µm
Authors: Marra Z. Alphonse , Li Jialin , Smerina David , Zhou Fangjie , Wu Yi , Chang Zenghu
Published: August 2021

Mid-infrared pulses with 200 nJ energy and 200 nm bandwidth were generated at 4.1 µm and 60 kHz repetition rate. The highly-stable LiGaS2-based Optical Parametric Amplifier was pumped by a turn-key, commercially available Yb:KGW laser.
Effect of Strain in WS2 Monolayer Integrated Excitonic Photodetector
Authors: Patil Chandraman , Maiti R. , Sorger Volker J.
Published: August 2021

We investigate the effect of local non-homogeneous strain on WS2 monolayer when integrated on a SiN photonic waveguide showing a strong spectral responsivity(80mA/W) at exciton wavelength(620nm) and shift of ~10nm in photodetector device.
Design and Testing of High-Index Liquid-Core Waveguides for Single Particle Sensing
Authors: Wright Joel G. , Meena Gopikrishnan G. , Schmidt Holger , Hawkins Aaron R.
Published: August 2021

Fluidic microchannels filled with high-index ZnI2 salt solution enable optimized particle fluorescence collection. We describe their design for efficient interfacing with solid-core excitation waveguides and their improved performance in comparison with leaky mode waveguide approaches.
Hybrid Guiding in a Multi-mode Slab Waveguide
Authors: Shiri Abbas , Abouraddy Ayman F.
Published: August 2021

We demonstrate the hybrid guidance of a pulsed field endowed with precise spatio-temporal structure in a 25-mm-long multi-mode thin-film waveguide. Group delay measurements confirm that the modal indices can be tuned independently of the waveguide parameters.
Electro-Optic Two-Mode Squeezing using Graphene Periodic Layers
Authors: Qasymeh Montasir , Eleuch Hichem
Published: August 2021

A novel electro-optic scheme is proposed to achieve hybrid (microwave and optical) two-mode squeezing. The proposed structure comprises periodic graphene layers, electrically biased by microwave signal and illuminated by two optical fields.
On-chip Microwave to Optical Transduction Using Rare Earth Doped Materials
Authors: Faraon Andrei , Rochman Jake , Xie Tian , Bartholomew John G.
Published: August 2021

Rare-earth ions simultaneously coupled to optical and microwave resonators are one of the platforms for realizing efficient microwave to optical quantum transducers. I discuss our group’s recent progress towards this goal.
Rydberg Excitons in Cu2O: from Bulk to Mesoscopic Dimensions
Authors: Naka Nobuko , Takahata Mitsuyoshi
Published: August 2021

Playgrounds of Rydberg states are not limited to atoms. By reviewing radiative processes of Rydberg excitons in semiconductor Cu2O, we show that controlling material dimensions is an interesting approach to explore Rydberg physics in solid.
High-field charge transport in InGaAs nanowires
Authors: Rana Rakesh , Balaghi Leila , Fotev Ivan , Schneider Harald , Helm Manfred , Dimakis Emmanouil , Pashkin Alexej
Published: August 2021

Charge transport in GaAs/InGaAs nanowires is studied using high-field terahertz pulses. With increasing terahertz field, the plasmon resonance redshifts and loses its spectral weight. The results provide evidence for inhomogeneous intervalley scattering across the nanowire.
Topological protection versus degree of entanglement of two-photon edge states
Authors: Tschernig Konrad , Busch Kurt , Perez-Leija Armando
Published: August 2021

We investigate theoretically the physical mechanisms that contribute to the vulnerability of highly entangled two-photon edge states propagating in topological insulator photonic lattices. We present clear guidelines for maximizing entanglement without sacrificing topological protection.
Integrated Ge-Sb-S Chalcogenide Raman Laser
Authors: Huang Yufei , Zhao Jiaxin , Xia Di , Zeng Pingyang , Yang Zelin , Zhang Bin , Li Zhaohui
Published: August 2021

We demonstrate an integrated Raman laser based on Ge-Sb-S high-Q microresonators. Both single-mode and multimode operation are shown with a low lasing threshold of ~9 mW. Besides, cascaded Raman lasing is demonstrated.
Power scalability in random Raman fiber laser based on a random fiber grating
Authors: Deng Jiancheng , Shen Ming , Li Yanxin , Shu Xuewen
Published: August 2021

We report a novel high-power single-wavelength random Raman fiber laser based on the localized random feedback provided by an ultrashort random fiber grating inscribed by a femtosecond laser.
Effect of Residual Mechanical Jitter on Incoherent Beam Combination Through Different Atmospheric Turbulences
Authors: Ghosh Sanchita , Syed Azeemuddin , Nayak Jagannath
Published: August 2021

The effect of Residual Mechanical Jitter (RMJ) has been analysed on the incoherent beam combination through various atmospheric turbulences. It is observed that the RMJ effect is more prominent for lower turbulence than higher turbulence.
Stimulated Emission with Evanescent Gain in the Total Internal Reflection Geometry
Authors: Asane J. K. , Chowdhury Md G. R. , Khabir K. M. , Podolskiy V. A. , Noginov M. A.
Published: August 2021

We demonstrated amplified spontaneous emission (ASE) enabled by evanescent gain at an interface between two adjacent dielectrics. The ASE wave is outcoupled to the high-index medium at the critical angle, enabling observation of spectacular emission rings.
Dispersive Wave Generation via Intermodal Cross-phase Modulation
Authors: Timmerkamp Maximilian , Lüpken Niklas M. , Scheibinger Ramona , Schaarschmidt Kay , Schmidt Markus A. , Boller Klaus-J. , Fallnich Carsten
Published: August 2021

We present dispersive wave generation via intermodal cross-phase modulation. The interaction between a higher-order soliton in one transverse mode and an orthogonal, low-intensity mode causes the latter to radiate a dispersive wave.
Fair Sampling with a Highly Parallel Laser Simulator
Authors: Pal Vishwa , Mahler Simon , Friesem Asher A. , Davidson Nir
Published: August 2021

We present efficient fair sampling of ground-state manifold of XY spin Hamiltonian based on dissipatively coupled lasers that includes a massive parallelism. Our simulator could potentially be exploited to address various combinatorial optimization problems.
Characterization of a tunable comb source based on a silicon micro-ring assisted fiber laser with optical injection
Authors: Li Cheng-Yuan , Chen Yen-Chu , Hsu Yi-Jang , Lai Yinchieh
Published: August 2021

Performance of a tunable comb source based on a silicon micro-ring assisted fiber laser with optical injection is characterized. By increasing the fiber cavity nonlinearity, wider frequency spacing up to 2 THz can be achieved.
Simultaneous Combination and Nearly Self-similar Pulse Compression of Five Pulses at Different Wavelengths
Authors: Huang Jiayao , Ye Feng , Nakkeeran K. , Wai P. K. A. , Li Qian
Published: August 2021

Numerical simulation of five raised-cosine pulses with spectral separation of 0.1 nm with each other merged into a single compressed pulse (12.8 compression factor) of nearly 50% of total input energy in a dispersion decreasing nonlinear fiber is reported.
A compact, selective and embedded-system enabled photoacoustic sensor for multiple trace detection
Authors: Zhang Xueshi , Liu Lixian , Zhang Le , Huan Huiting , Dong Lei , Zhou Ying , Shao Xiaopeng
Published: August 2021

A compact, selective and embedded-system enabled photoacoustic sensor was established with self-designed modules which replaced laser controller, signal generator and Lock-in Amplifier. The results exhibit that normalized noise equivalent absorption (NNEA) coefficient achieves 2.12×10-8cm-1W/Hz-1/2.
Exercise Vital Signs Detection Employing FMCW Radar and Artificial Neural Networks
Authors: Li King Leong , Lai Shih-Hsuan , Cheng Kyle , Henrickson Lindor , Chen Irwin , Wu Vincent , Chen Jyehong
Published: August 2021

We present a frequency modulated continuous wave (FMCW) radar system for non-contact heart rate monitoring during exercise. 90% accuracy predictions are achieved by employing a modified MobileNetV3 model for regression analysis.
Joint multi-parameter measurement with a Mach-Zehnder interferometer assisted by parametric amplifiers
Authors: Du Wei , Ou Z. Y.
Published: August 2021

We present a linear interferometer with the assistance of an SU(1,1) interferometer, and achieve optimum quantum enhancement in the measurement precision of an arbitrary mixture of phase and amplitude modulation.
Planar Schottky Photodiode Based on Multilayered 2D GeAs for High-Performance VIS-NIR Broadband Detection
Authors: Dushaq Ghada , Rasras Mahmoud
Published: August 2021

we demonstrate a metal-semiconductor-metal Schottky photodiode with asymmetric contact geometries based on multilayered 2D GeAs. Results show low dark current with stable, reproducible, and remarkable broadband spectral response from UV to optical communication wavelengths.
Optically Pumped Spin VCSELs for Reservoir Computing
Authors: Yang Yigong , Zhou Pei , Li Nianqiang
Published: August 2021

We propose a reservoir computing system based on an optically pumped spin VCSEL subject to optical feedback and injection. It allows for parallel information processing and its rate reaches 10Gpbs, which outperforms most RC systems based on electrically pumped lasers.
Inversionless gain in a microscale vapor cells
Authors: Talker Eliran , Barash Yefim , Mazurski Noa , Levy Uriel
Published: August 2021

We demonstrate gain without inversion towards lasing in a lossy medium, based on atomic interference in Rubidium vapor confined in microscale vapor cell. We also demonstrate the crucial role of miniaturization in achieving inversionless gain.
Numerically Accelerated Development Cycle for Ultra-high Finesse Micro-fabricated Resonators
Authors: Luo Yizhi , Mason David , Hendrie James P. , Jin Naijun , McLemore Charles A. , Kharel Prashanta , Kelleher Megan , Quinlan Franklyn , Diddams Scott A. , Rakich Peter
Published: August 2021

We show that eigenmode solvers can drastically shorten the development cycle of high finesse micro-Fabry-Pérot resonators. In conjunction with angstrom-level surface metrology, benchmarked simulation yields accurately predict eigenmode profiles and finesses in nonstandard resonator geometries.
Loss Induced Switching between Electromagnetically Induced Transparency and Critical Coupling in Chalcogenide Waveguide
Authors: Sun Yaodong , Hu Guiying , Xia Di , Zeng Pingyang , Xu Yi , Zhang Bin , Li Zhaohui
Published: August 2021

We propose a mechanism to harness the loss of phase change material (PCM) in a coupled high-Q resonators system for realizing a switching between on-chip electromagnetically induced transparency and critical coupling.
Shingled sub-diffraction multi-dimensional optical data storage in glass
Authors: Gao Jichao , Zhang Jingyu
Published: August 2021

A shingled sub-diffraction four-dimensional optical data storage approach is demonstrated.
A Novel Approach to Reduce Attenuation Loss in Silica-based Microstructured Optical Fibers
Authors: Dhar Anirban , Dutta Debjit , Choudhury Nilotpal , Ghosh Debashri
Published: August 2021

Fabrication of hexagonal-lattice microstructured optical fiber (MOF) with Thulium- doped silica capillaries introduced in the first ring during stacking is presented for the first time which exhibits lower transmission loss compared to undoped MOF of similar design.
Demonstration of mapping spin-based Pancharatnam-Berry phase to modal orbital rotation in a few mode fiber
Authors: Wang Hongya , Fang Liang , Zhang Xi , Liang Yize , Wang Jian
Published: August 2021

We theoretically and experimentally demonstrate that spin-based Pancharatnam-Berry phase can be mapped to the first-order modal orbital rotation in a few mode fiber, which could be potentially applied to fiber sensing and mode management.
Phononic integrated circuitry with an etchless fabrication process
Authors: Feng Ziyao , Liu Yang , Wang Lai , Sun Xiankai
Published: August 2021

We proposed, theoretically analyzed, and experimentally demonstrated a new type of phononic integrated waveguides, which can be fabricated with an etchless process, for guiding and routing gigahertz mechanical waves on a chip.
Ultra-thin Silicon Photonics Meta-detector for Perfect 850-950 nm Band Tunable Absorption
Authors: Avrahamy Roy , Milgrom Benny , Zohar Moshe , Auslender Mark , David Tal , Ishaaya Amiel A.
Published: August 2021

We introduce a silicon photonics meta-detector for perfect 850-950 nm band tunable absorption. Optimized < λ/4.5 thin designs of 10 nm Si film wrapped by a laterally asymmetric dual SiO2-Air Si-SiO2 gratings cavity, fully absorbs light of > 15μm penetration depth, in < 25 nm effectively thin Si absorber.
Direct Current Frequency Chirping of Diode Laser Injection Locked to WGMR.
Authors: Shitikov Artem E. , Lobanov Valery E. , Kondratiev Nikita M. , Benderov Oleg V. , Antoshkin German V. , Bilenko Igor A.
Published: August 2021

We investigate the possibility of frequency chirping of single mode diode laser self-injection locked to WGMR via driving current modulation. Maximum frequency deviation of LD locked to WGMR is measured as well as backward wave phase impact on LD linewidth.
Visible Wavelength Beam Steering in Silicon Nitride Nanophotonic Phased Arrays with a Supercontinuum Laser
Authors: Chen Zhenmin , Wang Hongjie , Sun Caiming , Deng Shupeng , Tang Xingke , Zhang Long , Jiang Rui , Shi Wu , Chen Zhen , Li Zhongyi , Zhang Aidong
Published: August 2021

In this work, beam steering angle of 65° is achieved on a 32-channel antennas phased array. We demonstrate a wide range of beam steering in visible band with a supercontinuum laser for the first time.
Compact and Broadband Silicon Photonic Multiplexers Based on Fast Adiabatic Structures
Authors: Gorgulu Kazim , Magden Emir Salih
Published: August 2021

We present the theory and experimental demonstration for compact integrated spectral multiplexers utilizing fast adiabatic structures. The demonstrated 1x2 multiplexers effectively separate/combine broadband long-pass and short-pass signals, with compact footprint and low loss.
Real-time Scalable Imaging through Dynamic Scattering Media at Ultra-low Light Level
Authors: Sun Yiwei , Wu Xiaoyan , Shi Jianhong , Zeng Guihua
Published: August 2021

We experimentally reconstruct high-quality images through dynamic media using as little as ∼0.4 photons per pixel by proposed scalable method, which provides guidance on the real-time photon-limited time-varying scattering imaging applications such as in vivo bioimaging.
Calibration of Fiber Grating Heavy Metal Ion Sensor Using Artificial Neural Network
Authors: Ghosh Souvik , Dissanayake Kasun , Sun Tong , Grattan Kenneth T. V. , Azizur Rahman B. M.
Published: August 2021

An ultrasensitive hybrid fiber grating sensor has been designed and functionalized with a novel nanocomposite material for selective detection of lead ions in water. Sensor performance is enhanced using an artificial neural network-based calibration process.
Reciprocating Reflective Double Gratings Based LCOS Waveshaper with Finer Bandwidth Resolution
Authors: Xu Jingquan , Chen Kexin , Qu Yingying , Liu Chen , Fu Songnian , Liu Deming
Published: August 2021

We demonstrate a LCOS-based waveshaper with reciprocating reflective double gratings as dispersive element. Arbitrary spectrum shaping can be obtained with the minimum filter bandwidth of 1.63 GHz and the bandwidth setting resolution of 240 MHz.
Hybrid inhibited-coupling and photonic bandgap hollow core fiber for telecom wavelength range
Authors: Vasko K. , Debord B. , Rosa L. , Vincetti L. , Benabid Fetah
Published: August 2021

We numerically demonstrate that a hollow-core fiber with a cladding comprised with a first-ring with non-touching tubes surrounded by a photonic bandgap outer-cladding combines low confinement loss, low optical overlap with silica and single modedness.
Anti-Bunching of Phase Modulated Frequency-Bin Entangled Photons
Authors: Indumathi Kirthanaa , Daugey Thomas , Piveteau Amelie , Furfaro Luca , Bourennane Mohamed , Merolla Jean-Marc
Published: August 2021

We introduce a high-brightness and high-visibility source to generate and manipulate high-dimensional frequency-bin entangled photon pairs, using photonic circuit integrable components. We demonstrate, with this source, the antibunching effect in high-dimensional space.
Experimentally optimizing QKD rates via nonlocal dispersion compensation
Authors: Neumann Sebastian Philipp , Ribezzo Domenico , Bohmann Martin , Ursin Rupert
Published: August 2021

Detection-time uncertainty due to chromatic dispersion in optical fibers decreases key rates of Quantum Key Distribution (QKD). Using nonlocal dispersion compensation, we demonstrate a 37-fold key rate increase of an entanglement-based QKD system.
Multimode Interferometric Biosensor based on the Evanescent-Wave of Si3N4 Rib-Optical Waveguides
Authors: Jung Hongsik
Published: August 2021

An integrated-optic, evanescent-wave biosensor utilizing a multimode interferometric waveguide based on a Si3N4 rib-optical waveguide consisting of the Si/SiO2/Si3N4/SiO2 stacked structure was described. It has been confirmed that the very fine changes in the refractive index of an analyte greatly affect the location of interferometric mode patterns and ultimately output optical power, and proved that this principle could be applied to integrated-optic biosensors. The sensitivity for the lengths of the multimode interferers 5380, 5400, and 5420μm, respectively was calculated from 6.714 to 7.63 [au/RIU] for the refractive index range of 1.33 to 1.35.
Near-Unity Efficiency “Photonic Hourglass” Single-Photon Source
Authors: Jacobsen Martin Arentoft , Gaál Benedek , Vannucci Luca , Gregersen Niels
Published: August 2021

We present the “photonic hourglass” structure as a candidate for a highly efficient single-photon source design. We demonstrate a computed spontaneous emission β factor above 0.99, enabled by suppression of the background emission.
Resolving the 12CH4 and 13CH4 lines of Raman spectrum
Authors: Vitkin V.V. , Kovalev A.V. , Grigorenko K.M. , Kurikova V.V. , Popov E.E. , Loiko P.A.
Published: August 2021

We demonstrate a method to determine the volume fraction of gaseous isotopologues of methane 12CH4 and 13CH4 in a mixture from a Raman spectrum under spectral overlap and limited resolution.
High-order mode mode-locked fiber laser based on few-mode based SESAM
Authors: Lv Si , Teng Linping , Shi Fan , Huang Yi , Zeng Xianglong
Published: August 2021

We experimentally compared the nonlinear saturation absorption characteristic of SESAM with LP01 and LP11 modes, and obtained a mode-locked laser enabling the oscillation of LP11 mode by using few-mode based SA.
Giant Raman wave from SPM sidelobes in ANDi fiber
Authors: Hansen Rasmus Eilkær , Petersen Christian Rosenberg , Bang Ole
Published: August 2021

We couple a supercontinuum with a distributed soliton spectrum into an ANDi fiber and demonstrate the generation of giant SPM waves by inter-pulse Raman scattering, which slowly red-shifts the total spectrum.
Broadband Polarization Beam Splitter based on Tilted Subwavelength Gratings on the Si3N4/Si Augmented Low Index Guiding Platform
Authors: Ozcan Can , Mojahedi Mo , Aitchison J. Stewart
Published: August 2021

We demonstrate a polarization beam splitter based on the use of subwavelength gratings on an augmented low index waveguide. The design provides <0.65 dB insertion loss and >25 dB extinction ratio with notable fabrication tolerance.
Electrical Control of Ultra-long Spin-Valley Polarization of Trions in Monolayer Molybdenum Ditelluride
Authors: Zhang Qiyao , Sun Hao , Tang Jiacheng , Dai Xingcan , Wang Zhen , Ning Cun-Zheng
Published: August 2021

We systematically investigated the electrically-tunable valley polarization mechanism in monolayer MoTe2 by helicity-resolved photoluminescence and ultrafast pump-probe spectroscopy. We observed an ultra-long trion valley lifetime of over 600 ps, the longest for a 2D material.
Polarity-Switchable Ultraviolet Photodetector Towards Spectrum-Distinguishable Photodetection
Authors: Liu Xin , Wang Danhao , Yu Huabin , Memon Muhammad Hunain , Sun Haiding
Published: August 2021

The design of polarity-switchable ultraviolet photodetector based on photovoltage-counteraction mechanism has been reported for the first time, which successfully distinguished different incident ultraviolet light and corresponding light intensity.
Half-Wave-Plate based Adaptive Polarization Controller
Authors: Wang Xuefeng , Zeng Yifan , Liao Ruolin , Shen Li , Zhao Can , Wu Hao , Tang Ming
Published: August 2021

We experimentally demonstrated an endlessly adaptive polarization controller based on a rotatable half-wave-plate on the lithium niobate platform. It is recommended to eliminate the carrier fading in a self-coherent communication system.
Transfer Matrix Method for Kerker-type Scattering of Metasurface
Authors: Zhang Xia , Li Jing , Donegan John F. , Bradley A. Louise
Published: August 2021

We experimentally, numerically and semi-analytically study the effect of the substrate on the Kerker-type scattering in ultra-thin nanodisk metasurface. A transfer matrix approach can be successfully used to account for the substrate effect in the semi-analytical case and explains the experimentally measured reflection dip of a Silicon nanodisk metasurface on SiO2/Si substrate.
-linewidth optical frequency comb reference to a fiber delay line
Authors: Tian Haochen , Meng Fei , Lin Baike , Cao Shiying , Fang Zhanjun , Song Youjian , Hu Minglie
Published: August 2021

A fully-stabilized Er:fiber optical frequency comb referenced to a km-long fiber delay line is presented. The comb mode’s fractional frequency stability is at 10-12level in 12.8 ms. The absolute linewidth is 587 Hz.
High-efficiency plasmon-enhanced GeSn photodetectors operating at 2 µm
Authors: Zhou Hao , Zhang Lin , Tong Jinchao , Wu Shaoteng , Chen Qimiao , Son Bongkwon , Zhang Dao Hua , Tan Chuan Seng
Published: August 2021

Au/GeSn grating structure was designed and adopted in GeSn photodetectors to enhance the optical absorption at 2 μm. A 3× improvement in responsivity to 0.386 A/W was achieved under TM-polarized illumination.
Mirror-Symmetric Patterning of Topological Insulator Reverses Photogalvanic Currents
Authors: Sun Xinxing , Adamo Giorgio , Eginligil Mustafa , Krishnamoorthy Harish N. S. , Zheludev Nikolay I. , Soci Cesare
Published: August 2021

Patterning of topological insulator with mirror-symmetric forms of planar chiral design yields photogalvanic currents with opposite directions due to the interplay between the spin-momentum locking and polarization conversion in the pattern.
Coarse Wavelength Division (De)Multiplexer Based on Cascaded Topology Optimized Wavelength Filters
Authors: Mao Simei , Cheng Lirong , Zhao Caiyue , Fu H. Y.
Published: August 2021

We propose a coarse wavelength division (de)multiplexer by cascading wavelength filters. Assisted by topology optimization, four compact wavelength filters centered at different wavelengths are designed with less than -0.7 dB insertion loss, respectively.
Imaging-based Laser Barcode for Cellular Phenotyping
Authors: Jie Randall Ang , Qiao Zhen , Chen Yu-Cheng
Published: August 2021

An imaging-based cellular laser barcode was developed to analyze complex laser modes generated from single cell lasers. Different cell types from neural differentiate stem cells and sizes were investigated, paving a road for cellular phenotyping.
Nanophotonic All-weather Windows for Energy-efficient Smart Buildings
Authors: Chowdhary Ashish Kumar , Sikdar Debabrata
Published: August 2021

We design electrically switchable all-weather smart windows to actively control portions of transmitted solar radiation. These window glasses outperform industry-standard commercial glasses. Such low-cost nanophotonic systems can significantly reduce global energy needs of air-conditioning systems.
A Compact and Low-noise Femtosecond Fiber Source Tunable Between 740-1236 nm for Wide Two-photon Fluorescence Microscopy Applications
Authors: Chou Lu-Ting , Zhong Dong-Lin , Liu Yu-Cheng , Lin Wei-Zhong , Chan Chao-Jin , Chia Shih-Hsuan
Published: August 2021

By optimizing fiber-optic nonlinearity and managing the damage threshold, we demonstrated tunable nJ-level femtosecond fiber sources, featuring a full pulse compressibility and low intensity noise, as a promising substitution of Ti:sapphire-based systems for imaging applications.
High Coupling-Efficiency Ridge-Waveguide Gratings on Single Crystal Thin-Film Lithium Niobate (TFLN)
Authors: Yang Sipan , Xu Jinbin , Wu Liying , Cheng Xiulan
Published: August 2021

The uniform ridge-waveguide grating couplers in TFLN are fabricated. All the structures in the device are monolithically patterned by electron-beam lithography. Single coupler exhibits an ultra-high coupling efficiency of -6.5 dB at 1546 nm.
Detection of near- and far-field radiation pattern of a silicon-on-insulator optical phase array
Authors: Nie Xiaomin , Sun Caiming , Wang Hongjie , Chen Zhenmin , Deng Shupeng , Zhang Aidong
Published: August 2021

We experimentally measured the radiation of optical phased arrays fabricated on SOI waveguide platform. By tuning the input laser wavelength, we realized one-dimension beam steering and observed standing-wave patterns in the waveguide antennas.
A highly sensitive differential photoacoustic gas sensor based on modified non-local Euclidean medians algorithm
Authors: Zhang Le , Liu Lixian , Zhang Xueshi , Yin Xukun , Li Wei , Huan Huiting , Shao Xiaopeng
Published: August 2021

A upgrade differential photoacoustic gas sensor was established with a modified non-local Euclidean medians algorithm. The result shows that gas detection sensitivity is 83 ppb with sevenfold improvement than the original photoacoustic setup.
Unlocking the Ultrafast Charge Transfer in Colloidal CsPbBr3/GO Heterostructure
Authors: Maurya Naresh Chandra , Shrivastava Megha , Poonia Ajay K. , Adarsh K.V.
Published: August 2021

We studied the ultrafast charge transfer in type II CsPbBr3/GO heterostructure in the strongly coupled regime to unlock their potential for perovskite solar cells and photodetectors. We demonstrate that GO act as potential hole-transport layer.
Planck Spectroscopy
Authors: Xiao Yuzhe , Wan Chenghao , Salman Jad , Maywar Ian J. , King Jonathan L. , Shahsafi Alireza , Kats Mikhail A.
Published: August 2021

We developed and experimentally demonstrated a minimalistic spectroscopic technique that does not require wavelength-selective components such as prisms, gratings, or interferometers—instead using the temperature and wavelength dependence of Planck's law of thermal emission.
A double-sided radiative cooling architecture with a record local cooling power density of 270 W/m2
Authors: Zhou Lyu , Song Haomin , Zhang Nan , Rada Jacob , Signer Matthew , Gan Qiaoqiang
Published: August 2021

We report a double-sided radiative cooling system with a record high local cooling power density of ~270 W/m2. The configuration of the system was investigated theoretically and a superior cooling performance was demonstrated experimentally.
Optomechanical spin control of nitrogen-vacancy centers in diamond
Authors: Shandilya Prasoon K. , Lake David P. , Mitchell Matthew , Sukachev Denis D. , Barclay Paul E.
Published: August 2021

We demonstrate optomechanical manipulation of nitrogen-vacancy electron spins in a diamond cavity for the first time. Our work paves the way for the realization of quantum networks at room temperature based on phonon-spin coupling.
Quantum Control of Microwave-to-Optical Transducers for Inhomogeneous Broadening Compensation
Authors: Mishra Sattwik Deb , Trivedi Rahul , Safavi-Naeini Amir H. , Vučković Jelena
Published: August 2021

We use numerical optimization to design the temporal shape of the laser field driving an inhomogeneous ensemble of quantum emitters in order to restore superradiance effects and improve single photon microwave-to-optical transduction efficiencies.
Simulation, fabrication and control of nanophotonic circuits including diamond-based quantum emitters
Authors: Olthaus Jan , Schrinner Philip P. J. , Schuck Carsten , Reiter Doris E.
Published: August 2021

Simultaneous access to several solid-state spin systems with Purcell-enhanced coupling of single photons into photonic integrated circuits is demonstrated. Photonic crys-tal cavities embedded in tantalum pentoxide waveguides enable optical detection of mag-netic resonances.
40mJ nonlinear compression and energy scaling route for Yb amplifier using large-core hollow fibers
Authors: Fan G , Carpeggiani PA , Tao Z , Coccia G , Safaei R , Kaksis E , Pugzlys A , Légaré F , Schmidt BE , Baltuška A
Published: August 2021

We illustrate the energy scaling rules of hollow-core fiber nonlinear compression for high energy Yb technologyies. As a demonstration, 70 mJ 230 fs pulses were compressed down to 25 fs with 1.3 TW peak power.
100 keV Electron Beam Generation by Direct Laser Acceleration using Longitudinal Electric Fields
Authors: Powell J. , Payeur S. , Fourmaux S. , Ibrahim H. , Kieffer J. C. , MacLean S. , Légaré F.
Published: August 2021

We report the generation of a 100 keV electron beam by direct laser acceleration using longitudinal electric fields in low-density gas. This configuration is a viable pathway for ultrafast electron experiments and relativistic electron production.
Necklace High Harmonic Generation for Low-Divergence, Soft X-Ray Harmonic Combs with Tunable Line Spacing
Authors: Brooks Nathan J. , Rego Laura , Nguyen Quynh L. D. , Román Julio San , Binnie Iona , Plaja Luis , Hernández-García Carlos , Kapteyn Henry C. , Murnane Margaret M.
Published: August 2021

By driving high-harmonics with necklace laser beams, we produce combs with tunable frequency content and spacing, up to the soft x-ray region. The emitted harmonics also exhibit distinct spatial profiles and lower divergence than Gaussian-driven harmonics.
Accelerating and Decelerating Space-Time Wave Packets in Free Space
Authors: Yessenov Murat , Abouraddy Ayman F.
Published: August 2021

We show that endowing an optical field with precise spatio-temporal structure enables the realization of large axial acceleration and deceleration in free space. We experimentally demonstrate group velocity changes ~ c over a propagation distance ~ 20 mm.
Demonstration of the Space-Time Talbot Effect
Authors: Hall Layton A. , Yessenov Murat , Ponomarenko Sergey A. , Abouraddy Ayman F.
Published: August 2021

We demonstrate self-imaging in space and time of a discretized spatio-temporal optical field lattice in which the diffraction and dispersion lengths, and thus the spatial and temporal Talbot lengths, are intrinsically equal.
Photonic Topological Dissipation in Time-Multiplexed Resonator Networks
Authors: Leefmans Christian , Dutt Avik , Williams James , Yuan Luqi , Parto Midya , Nori Franco , Fan Shanhui , Marandi Alireza
Published: August 2021

We utilize dissipatively coupled, time-multiplexed photonic resonator net-works to demonstrate topologically nontrivial behaviors in the dissipation of one- and two-dimensional lattices. We present edge state and band structure measurements of the these networks.
Quantum State Tomography of an On-chip Polarization-Spatial Qubit SWAP Gate
Authors: Cheng Xiang , Xie Zhenda , Chang Kai-Chi , Sarihan Murat Can , Lee Yoo Seung , Vinod Abhinav Kumar , Li Yongnan , Xu XinAn , Kocaman Serdar , Yu Mingbin , Kwong Dim-Lee , Shapiro Jeffrey H. , Wong Franco N. C. , Wong Chee Wei
Published: August 2021

We experimentally demonstrate a chip-scale polarization to spatial-momentum qubit SWAP gate. High fidelity of the SWAP gate operation is confirmed by quantum state tomography, with average gate fidelity up to 97.30%.
Broadband Mid-IR Spectroscopy with Near-IR Grating Spectrometers
Authors: Kaufmann Paul , Chrzanowski Helen M. , Vanselow Aron , Ramelow Sven
Published: August 2021

We demonstrate fast, mid-infrared (3.2-4.3 μm) spectroscopy with high resolution (1.5 cm܋1) based on nonlinear interferometry with undetected photons using a commercial, Si-CCD based grating spectrometer.
Quantum Network Aggregation
Authors: Munro William John , Piparo Nicolò Lo , Nemoto Kae
Published: August 2021

We introduce the concept of quantum network aggregation where the multiplexing of independent quantum channels allows us to protect the transmission of information between users on that network – even when that network has limited resources.
Ultrafast signatures of spin and orbital order in the antiferromagnetic Mott insulator Sr2CrO4
Authors: Lee Min-Cheol , Occhialini Connor , Li Jiariu , Zhu Zhihai , Mix L. T. , Yarotski Dmitry A. , Comin Riccardo , Prasankumar Rohit P.
Published: August 2021

We used femtosecond time-resolved optical spectroscopy to study ultrafast dynamics of photoexcited carriers in the antiferromagnetic Mott insulator Sr2CrO4, revealing distinct time-domain signatures of different spin and orbital orders.
Experimental Demonstration of Dynamic Band Structure Measurement along a Synthetic Dimension
Authors: Li Guangzhen , Zheng Yuanlin , Dutt Avik , Yu Danying , Shan Qingrou , Liu Shijie , Yuan Luqi , Fan Shanhui , Chen Xianfeng
Published: August 2021

We propose the experimentally dynamic band structure measurement, which exhibits the evolution of the wavevector along the synthetic dimension and simulates the momentum movement in the one-dimensional solid-state system under a constant force.
Laser Tractor-Beam of 2D Flow in Soap Films
Authors: Patsyk Anatoly , Sharabi Yonatan , Bandres Miguel A. , Sivan Uri , Segev Mordechai
Published: August 2021

We present the first observation of laser tractor-beam of 2D flow in soap films.
Combinatorial Optimization with the Optical Potts Machine
Authors: Honari-Latifpour Mostafa , Miri Mohammad-Ali
Published: August 2021

We show that networks of phase-tristable optical parametric oscillators simulate the three-state Potts model. A direct simulation of the underlying nonlinear dynamical model pro-vides an efficient path toward combinatorial optimization.
Light stopping by reflection from a moving index front
Authors: Gaafar Mahmoud A. , Holtorf Jannik , Eich Manfred , Petrov Alexander Yu.
Published: August 2021

Nonlinearly generated refractive index fronts in waveguides can change the signal frequency and wavenumber leading to the indirect transitions. Here, we discuss how dynamic light stopping and pulse time reversal can be implemented in dispersive waveguides via these transitions. Our scheme, in contrast to previous concepts of light stopping and time reversal, is not limited by a strict phase matching condition and does not require local index variations, thus, can manipulate broadband signals in a single step process. The presented results are experimentally feasible using existing photonic waveguides technologies.
Enhanced Photon Emission of Metallic Cylindrical Ridges upon Interaction with a Free Electron
Authors: Nussupbekov Ayan , Adamo Giorgio , So Jin-Kyu , Wu Lin , Chong Yidong , Wong Liang Jie
Published: August 2021

We show that free electron radiation from metal films can be enhanced by over two orders of magnitude with the introduction of a cylindrical nanoridge, compared to previously studied structures such as bullseye gratings.
Non-Abelian Charged Nodal Rings in Dielectric Medium
Authors: Park Haedong , Wong Stephan , Zhang Xiao , Oh Sang Soon
Published: August 2021

We show linked nodal rings in momentum space with a dielectric photonic crystal. From evolutions of the eigenstates polarizations along the loops which enclose the nodal line(s) of the rings, their non-Abelian topological charges are also analyzed.
Inhibited Optical Turbulence in Near-Zero-Index Media
Authors: Liberal Iñigo , Lobet Michaël , Li Yue , Engheta Nader
Published: August 2021

We theoretically demonstrate that near-zero-index (NZI) media behave as ideal electromagnetic fluids where optical turbulence is intrinsically inhibited. This result provides a new perspective of NZI wave phenomena and poses interesting technological possibilities.
Guiding light at criticality and beyond
Authors: Rodrigues Janderson R. , Dave Utsav D. , Mohanty Aseema , Ji Xingchen , Datta Ipshita , Gutierrez-Jauregui Ricardo , Almeida Vilson R. , Ansejo-Garcia Ana , Lipson Michal
Published: August 2021

We experimentally demonstrate waveguiding at the critical angle in a dielectric multi-layered structure. At this exceptional point, the waveguide becomes scale invariant and the field is confined to the low-index region, with a spatially-uniform transverse profile
Enabling Scalability of Photonic Frequency-Domain Quantum Processing
Authors: Kashi Anahita Khodadad , Kues Michael
Published: August 2021

Via a reconfigurable photonic frequency circuit, we show spectral bosonic and fermionic Houng-Ou-Mandel interference between independently created pure single photons, demonstrating photon number scalability and versatility of the frequency processing approach.
Coherent diffractive extreme-ultraviolet generation from nanostructured silica
Authors: Abbing Sylvianne D.C. Roscam , Zhang Zhuang-Yan , Kolkowski Radoslaw , Campi Filippo , Koenderink A. Femius , Kraus Peter M.
Published: August 2021

We introduce extreme-ultraviolet high-harmonic generation from nanostructured silica. Generation inside micron and nanoscale sub-wavelength structures with periodic as well as aperiodic features leads to emission of structured extreme-ultraviolet pulses, useful for spectroscopy and imaging.
Decoherence and Revival of Attosecond Charge Migration Driven by Non-adiabatic Dynamics
Authors: Matselyukh D. T. , Despré V. , Golubev N. V. , Kuleff A. I. , Wörner H.J.
Published: August 2021

The attosecond quantum beat of an electronic state superposition was captured in SiH4 using soft-X-Ray attosecond transient-absorption spectroscopy. Its decoher-ence and revival, induced by non-adiabatic vibrational dynamics, were reproduced using MCTDH calculations.
Mid-Infrared Metasurface Based on a Phase-Change Material for Enhanced Third-Harmonic Generation
Authors: Yue Fuyong , Piccoli Riccardo , Shalaginov Mikhail Y. , Gu Tian , Richardson Kathleen , Morandotti Roberto , Hu Juejun , Razzari Luca
Published: August 2021

We report on the nonlinear optical properties of the phase change material Ge2Sb2Se4Te1 (GSST). A 30-fold enhancement of third-harmonic generation is also demonstrated using a GSST metasurface operating in the mid-wave infrared region.
The Temporal Talbot Effect on the Surface of Water
Authors: Rozenman Georgi Gary , Shemer Lev , Zimmermann Matthias , Efremov Maxim A. , Schleich Wolfgang P. , Arie Ady
Published: August 2021

We study the evolution of linear and nonlinear Talbot carpets emerging in surface gravity water waves. In our measurements, we are able to record both amplitude and phase of the Temporal Talbot effect.