bluuebunny/crossref_metadata_2025 huggingface dataset:
Axial hexagonal evanescent fields in tapered multicore fiber for nanoparticles trapping and microsensing
Authors: Tian Zhen , Chen Nan-Kuang , Yan Dong , Grattan Kenneth T. V. , Rahman B M A , Zhang Liqiang , Wang Daqin , Shum Perry Ping , Wu Qiang
Published: October 2020

By tapering a weakly-coupled MCF into a strongly-coupled MCF, supermode interference effects can be generated with the best extinction ratio, 47.4dB and tuning efficiency, 392nm/RIU. Up-conversion nanoparticles are attracted and aligned by hexagonal evanescent fields.
Optomechanics with a levitated nanoparticle
Authors: Quidant Romain
Published: October 2020

We discuss the use of a levitated mesoscopic particle in vacuum as a optomechanical system with unique features and performance.
Orbital Angular Momentum (OAM) Carried by Asymmetric Vortex Beams for Wireless Communications: Theory and Experiment
Authors: Yan Baoluo , Lu Zehui , Hu Jinyao , Xu Tianxu , Zhang Hao , Lin Wei , Wu Huanbao , Liu Haifeng , Liu Bo
Published: October 2020

Unlike traditional symmetrical vortex beams, we demonstrate one kind of asymmetric spatial modes, namely Lommel-Gaussian mode carrying OAM for optical communications, which possesses higher channel capacity through orthogonal multiplexing process.
A Simplified Multiset-Partition Distribution Matching for PS-16QAM Optical Fiber Systems
Authors: Jing Xinlin , Zhang Jing , Jin Taowei , Hu Shaohua , Qiu Kun
Published: October 2020

We propose a simplified multiset-partition distribution matcher (MPDM) with pairwise probability partitioning without distribution changing. The simplified MPDM has a shaping gain and lower rate loss in fiber-optic systems with AWGN and fiber nonlinearities.
Optical Fiber Channel Modeling Method Using Multi-BiLSTM for PM-QPSK Systems
Authors: Cui Qichuan , Wang Danshi , Li Mingliang , Song Yuchen , Li Jin , Zhang Min
Published: October 2020

A deep learning-based modeling technique is proposed for dual-polarization optical fiber channel in PM-QPSK system. All the values of R-square and similarity are >0.98 and >0.99.
Impacts of IQ Imbalance on Carrier Assisted Direct Detection
Authors: Sun Chuanbowen , Ji Honglin , Ji Tonghui , Xu Zhaopeng , Shieh William
Published: October 2020

We investigate the impacts of IQ imbalance on the carrier assisted direct detection. Amplitude and phase imbalance are simulated, and the effectiveness of SSBI mitigation in the presence of IQ imbalance is studied.
Non-Degenerate Sum-Frequency Generation 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: October 2020

We experimentally and numerically demonstrate sum-frequency generation in (110)-grown GaAs nanoresonators using photons with non-degenerate polarization and energy. Drawing on quantum-classical correspondence, we predict pathways for down-conversion processes leading to linear, non-degenerate polarization states.
Enhanced Directional Fluorescence via Modehybridization in Metal-Dielectric Nanoantenna
Authors: Sun Song , Zhang Taiping , Duan Huigao
Published: October 2020

A robust metal-dielectric nanoantenna is proposed for fluorescence enhancement based on the synergistically coupling between plasmonic-resonance and dielectric magnetic-dipole-mode. The average enhancement of multiple emitters can achieve > 1500 and maximum directivity enhancement > 3000.
Precise Tuning of Epsilon-Near-Zero Properties in Indium Tin Oxide Nanolayer by Supercritical Carbon Dioxide
Authors: Wu Jiaye , Fu Haishi , Zheng Yingkai , Chang Kuan-Chang , Zhang Shengdong , Fu H. Y. , Li Qian
Published: October 2020

We experimentally demonstrate the precise tuning of the epsilon-near-zero (ENZ) properties in indium tin oxide nanolayer by supercritical carbon dioxide treatment. Its ENZ wavelength is red-shifted 4.39 nm with a 3.13%-10.52% decrease in intrinsic loss. © 2020 The Author(s)
Advances in Nonlinear CMOS Photonics
Authors: Tan Dawn T. H. , Ng Doris K. T. , Choi J. W. , Sahin E. , Xing P. , Sohn B. U. , Gao H. , Cao Y. , Gupta A. , Chen G. F. R.
Published: October 2020

Nonlinear CMOS Photonics allows for seamless integration with CMOS electronics and ease of manufacturability. We discus developments in USRN-based nonlinear optics. We demonstrate 8.7 soliton-effect compression in USRN waveguides, on-chip Bragg-soliton compression and fission.
Electro-Optic Mode-Selective Switch Based on Cascaded Lithium-Niobate Waveguide Directional Couplers
Authors: Zhang Mengruo , Chen Kaixin , Jin Wei , Wu Jieyun , Chiang Kin Seng
Published: October 2020

We demonstrate an electro-optic mode-selective switch based on the structure of cascaded lithium-niobate asymmetric waveguide directional couplers, where a high-index oxide layer is deposited on a waveguide of the coupler for post-tuning its switching efficiency. © 2020 The Author(s)
Observation of Self-Modulation Oscillations in Vortex Laser Formed by combined Off-axis Traveling Waves
Authors: Lin Yuan Yao , Hsieh Cheng Yu
Published: October 2020

Self-modulation oscillations were observed in a vortex laser formed by superposition of off-axis resonating traveling waves. Up to 4 harmonics over 30dB were measured when it is enhanced by pump power dependent relaxation oscillations.
Ultralow-jitter 22-GHz silica microcomb
Authors: Kwon Dohyeon , Jeong Dongin , Jeon Igju , Do In Hwan , Lee Hansuek , Kim Jungwon
Published: October 2020

Using a 20 zs/Hz1/2 resolution self-heterodyne-based jitter measurement method, we demonstrate the generation of 113-as (2.5-fs) timing jitter [integration bandwidth: 100 kHz (10 kHz)–3 MHz] soliton pulse train from a 22-GHz silica microcomb. © 2020 The Author(s)
Using Additive Manufacturing to Package and Chirp Fibre Bragg gratings
Authors: Canning John , Ziyani Asma
Published: October 2020

Additive manufacture (AM) offers a simple route to packaging components such as fibre Bragg gratings. Further, polymers with higher solid state densities than liquid state enable a simple approach to tightly fixing optical components with AM packages. With applied load and using printer directionality, chirping fibre Bragg gratings becomes possible. Information about both induced and applied stresses, and operator error, can be determined from the observed spectral shifts and chirping. Broadband gratings with bandwidths, Δλ
BW
> 7nm/cm, are demonstrated.
Heat Management with Flexible Textiles
Authors: Haque Ahasanul , Alim Nusrat , Morozov Evgeny V. , Aboutorab Neda , Boriskina Svetlana V. , Miroshnichenko Andrey , Hattori. Haroldo T.
Published: October 2020

Heat management is essential for human comfort. Here, we have experimentally investigated optical and thermal properties of Kevlar fabrics that can have 90% emissivity in the mid-infrared region and produce a 2.6°C temperature gradient.
Photonic Generation of Sub-Terahertz Signals using Self Phase Modulation in Highly Nonlinear Fibers
Authors: Shehata Mohamed , Wang Ke , Withayachumnankul Withawat
Published: October 2020

We propose photonic generation technique of sub-terahertz signals based on the Kerr effect in highly nonlinear optical fibers. Simulation results confirm the feasibility of generating an on-off keying modulated signal at 100 GHz.
Adhesive-free, high optical quality deformable mirror
Authors: Cao Huy Tuong , Ng Sebastian , Noh Minkyun , Brooks Aidan , Martichard Fabrice , Veitch Peter
Published: October 2020

Mode control is crucial for the high-precision interferometry such as gravitational-wave detectors. We report here the design and characterisation of a linear, high dynamic range, spherically deformable, adaptive mirror that is adhesive-free and low cost.
755 nm Alexandrite laser on-peak pumped by a frequency doubled Raman laser at 589 nm
Authors: Guan Chen , Zhao Zhigang , Liu Zhaojun , Cong Zhenhua , Wang Shiwu , Nie Yi , Zhang Lei , Zhang Xingyu
Published: October 2020

A 755 nm Alexandrite laser employing on-peak pumping at 589 nm is reported. A maximum average power is up to 2.51 W with a beam quality factor (M2) better than 1.25.
Enabling the use of Raman lasers for spectroscopy: continuous tunability, narrow linewidth and efficient cascading in diamond
Authors: Echarri Daniel T. , Chrysalidis Katerina , Fedosseev Valentin N. , Marsh Bruce A. , Mildren Richard P. , Olaizola Santiago M. , Spence David J. , Wilkins Shane G. , Granados Eduardo
Published: October 2020

We demonstrate a Raman laser continuously tunable in the visible range, capable of performing element-selective photo-ionization. The Stokes outputs exhibited a linewidth of 11.0 ± 1.0 GHz with a conversion efficiency of more than 60%. © 2020 The Authors
Highly extended filaments in aqueous gold nanoparticle colloidals
Authors: Yuan S. , Nie Y. , Zeng H.
Published: October 2020

The filament length is increased by more than ten times and the refractive index is enhanced by six times by initiating filamentation in gold-nanoparticle-doped water. Strong supercontinuum and a rainbow like filament path are observed. © 2020 The Authors
Centimetre-Spatial-Resolution Photonics-Based Stepped-Frequency Radar: Implementation and Comparison
Authors: Zhang Ziqian , Liu Yang , Burla Maurizio , Eggleton Benjamin J.
Published: October 2020

We demonstrate a photonics-based stepped-frequency radar with centimetre range resolution, using a frequency-shifting loop and low-cost MHz-speed electronics. Compared with those using high-speed electronics, this system achieves competitive performance and flexible bandwidth reaching 5.76 GHz. © 2020 The Author(s)
Fano resonances in individual AlGaAs nanoparticles driven by quasi-BIC modes
Authors: Melik-Gaykazyan Elizaveta , Koshelev Kirill , Choi Jae-Hyuck , Kruk Sergey , Bogdanov Andrey , Park Hong-Gyu , Kivshar Yuri
Published: October 2020

We employ cylindrical vector beams to uncover the transformation of the Fano resonance lineshape in the scattering spectra of individual subwavelength AlGaAs nanoparticles close to the regime of bound states in the continuum. © 2020 The Author(s)
Monolayer Passivation of Silica Resonators to Avoid Excess Thermal Line Broadening
Authors: Jeong Dongin , Lee Hansuek
Published: October 2020

We present passivation on silica resonators by hexamethyldisilazane which suppresses excess thermal line broadening due to water adsorption without degeneration of Q factor. Soliton mode locking with passivated resonators in moisturized atmosphere was demonstrated.
On the efficacy of soliton crystal micro-combs as highly-parallel local oscillators for high-bandwidth systems
Authors: Prayoonyong Chawaphon , Tan Mengxi , Xu Xingyuan , Boes Andreas , Nguyen Thach , Chu Sai T. , Little Brent , Morandotti Roberto , Moss David J. , Corcoran Bill
Published: October 2020

We investigate the performance of soliton crystal micro-comb lines as local oscillators, by emulating degradation through noise loading. We show a 0.3 b/symbol penalty for the minimum comb OSNR on a 64QAM signal.
A Low-cost 112-Gbps Medium Reach Direct-Detection Transceiver
Authors: Chen Zhuo , Zhong Linsheng , Zhang Shenmao , Ao Xueyuan , Yang Qi , Fu Songnian , Liu Deming
Published: October 2020

We propose a novel 100Gbps transceiver scheme for medium reach application. A simulation of 112-Gbps block-wise 16-QAM signal transmission is conducted over 240-km SSMF using a single-end PD with a great cost reduction.
Spatial mode sorter coronagraphs
Authors: Carpenter Joel , Fontaine Nicolas K. , Norris Barnaby R. M. , Leon-Saval Sergio
Published: October 2020

We discuss the use of spatial mode sorters as coronagraphs capable of operating near the fundamental limits at small inner working angles.
A Novel Fiber-to-Waveguide Coupling Scheme for Lithium Niobate on Insulator Devices
Authors: Wang Meng Ke , Li Jun Hui , Hu Zhe Feng , Chen Kai Xin
Published: October 2020

We propose a novel scheme for coupling between fibers and submicron lithium niobate on insulator (LNOI) waveguides. LNOI is bonded on D-shaped SMF to realize efficient evanescent coupling.
Superstructure and Superimposed Fiber Bragg Gratings Fabricated through Small Spot Direct UV Writing
Authors: Jantzen Senta L. , Smith Devin H. , Bannerman Rex H. S. , Mennea Paolo L. , Boyd Lewis J. , Smith Peter G. R. , Holmes Christopher
Published: October 2020

We demonstrated the fabrication of a record number of over 40 overlaid fiber Bragg gratings. We compared two different fabrication techniques: consecutively superim- posed and digitally superstructured gratings and analyzed the evolving AC refractive index change.
Photodarkening Suppressed Low Loss Yb:Al:P Doped Fiber by All Solution Doping Technique
Authors: Sidharthan R. , Li H. , Lim K. J. , Ng VMH , Chang C. J , Seng Y. M. , Chua S. L. , Pita K. , Yoo S.
Published: October 2020

We present an all solution doping technique to fabricate step index Yb-doped Aluminophosphosilicate fiber, with P2O5 powder used for incorporating Phosphorous. Low loss (8dB/Km), low NA (0.06) photodarkening suppressed step index fiber is reported.
Diamond Sodium Guide Star Laser
Authors: Yang Xuezong , Kitzler Ondrej , Spence David J. , Bai Zhenxu , Feng Yan , Mildren Richard P.
Published: October 2020

For the first time, a 22 W continuous-wave sodium guide star laser is demonstrated in an external standing-wave diamond Raman resonator with intra-cavity second harmonic generation.
Spectral broadening of 2 µm discrete mode diode lasers by direct and external phase modulation
Authors: Gambell Adam , Simakov Nikita , Hemming Alexander
Published: October 2020

We have investigated spectral broadening of a 2070 nm discrete mode diode laser by both direct modulation of the diode injection current, and external modulation of an electro-optical phase modulator. © Commonwealth of Australia
Three-Photon Absorption Spectra and Bandgap Scaling in Direct-Gap Semiconductors
Authors: Benis Sepehr , Cirloganu Claudiu M. , Nootz Gero , Olszak Peter D. , Padilha Lazaro A. , Peceli Davorin , Reichert Matthew , Webster Scott , Ensley Trenton , Hu Honghua , Woodall Milton , Hagan David J. , Van Stryland Eric W.
Published: October 2020

We present 3-photon-absorption (3PA) measurements of 9 direct-gap semiconductors, including the 3PA spectra of ZnS, GaAs, and ZnSe and use a Kane 4-band model to fit the spectra and show the bandgap dependence.
Harmonic Generation and Broadband Upconversion in a Coupled Semiconductor-Metal Nanoparticle Bilayer
Authors: Spear Nathan J. , Hallman Kent A. , Hernández-Pagán Emil , Haglund Richard F. , Macdonald Janet E.
Published: October 2020

A heterostructure comprising CuS and Au nanoparticle films separated by insulating ligands exhibits enhanced second- and third-harmonic generation and broadband multiphoton photoluminescence from femtosecond excitation of localized surface plasmon resonances of CuS at 1050 nm.
Near-infrared photodetectors based on Ge nanoparticles
Authors: Saadabad Reza Masoudian , Olk Andreas , Neshev Dragomir N. , Miroshnichenko Andrey E.
Published: October 2020

We investigate near-infrared photodetectors based on subwavelength Ge nanoparticles. While the photodetector size guarantees a high-bandwidth device, the high quantum efficiency is possible by the localization of the optical energy.
From Passive to Active Manipulation of the Polarization States of Light via Metastructures
Authors: Peng Ruwen , Wang Mu
Published: October 2020

In this work, we present our recent work on passive or active manipulation of the polarization state of light with both 2D and 3D metastructures. We start from how to tune the polarization states of light via time retardation with a microstructured surface, and then to control them based on a dispersion-free metastructure. Further, we show a freely tunable polarization rotator for broadband terahertz waves by using a metastructure, and also an example on dynamically switching the polarization state of light based on the phase transition of vanadium dioxide. The investigations provide some guidelines to control the polarization states of light at subwavelength scale.
Microwave Photonic Notch Filter with Integrated Modulation Transformation and Optical Carrier Suppression
Authors: Daulay Okky , Botter Roel , Marpaung David
Published: October 2020

A silicon nitride chip-based tunable microwave photonic notch filter based on phase-to-intensity modulation conversion with dual-sideband processing is proposed. Furthermore, an integrated optical carrier filtering is added to enhance the noise performance of the filter.
Broadband RF channelization using microcombs
Authors: Xu Xingyuan , Tan Mengxi , Wu Jiayang , Boes Andreas , Nguyen Thach G. , Chu Sai T. , Little Brent E. , Morandotti Roberto , Mitchell Arnan , Moss David J.
Published: October 2020

We demonstrate RF channelizers based on 49GHz microcombs. 92 parallel channels and an instantaneous bandwidth of 8.08GHz are achieved for high-resolution RF spectral channelization. This approach is promising for integrated photonic RF receivers.
Non-invasive Characterisation of Lead Iodide Nanosheets by Nonlinear Microscopy
Authors: Yan Jingshi , Ou Qingdong , Vincenti Maria Antonietta , De Angelis Costantino , Bao Qiaoliang , Neshev Dragomir N.
Published: October 2020

We demonstrate a nonlinear microscopy-based non-invasive technique for characterisation of PbI2 nanosheets. By using the polarisation, wavelength and thickness dependences of the harmonic emissions we can precisely determine their thickness, strain and crystalline orientation. 160.4236 160.4330 Lead iodide (PbI2) is a layered material with unique optical and electrical properties, including direct bandgap in the bulk and a layered crystalline structure, consisting of close-packed Pb atoms sandwiched between two layers of Iodine atoms [1]. Compared to the widely-studied TMDCs, 2D PbI2 is a halide semiconductors with a larger visible bandgap (Eg ∼ 2.4 eV) which endows its distinct optical properties. Despite being extensively studied in its bulk form and being used as a precursor for perovskite materials, the recently developed PbI2 nanosheets have shown a great promise for high-performance optoelectronic devices, such as flexible photodetectors [2] and nanolasers [3]. However, such novel applications of PbI2 nanosheets require careful characterization of their crystalline structure, thickness, strain and nonlinearity. Here we deploy a nonlinear optical microscopy as a non-invasive technique to investigate PbI2 nanosheets and fully determine their crystalline properties. To achieve such complete characterisation we analyse the polarisation, thickness and strain dependence of the second harmonic generation (SHG) and third harmonic generation (THG) from solution-grown PbI2 nanosheets. Our experimental results are also compared with numerical simulations of the conversion efficiency of the nonlinear harmonic generation with different thickness and wavelength, revealing the influence of the layered crystalline structure. Our measurements allow, for the first time, to precisely determine their thickness, crystalline orientation and strain with a non-invasive optical technique.
Generation of gigahertz pulse based on a hybrid plasmonic microfiber resonator
Authors: Ding Zi-xuan , Xu Fei
Published: October 2020

We demonstrate a gigahertz stable pulsed all-fiber laser based on the hybrid plasmonic microfiber knot resonator device. Output with repetition rates from 41.2 to 144.3 GHz at 1550 nm and picosecond pulse-width is achieved.
Gigahertz Harmonic Mode-Locking of Fiber Laser Stabilized by Acoustic Resonances in Silica Microfiber
Authors: Han Dae Seok , Ha Chang Kyun , Moon Kyoung Jun , Nam Kee Hwan , Kang Myeong Soo
Published: October 2020

We use intense optoacoustic interactions involving the acoustic resonances confined in high-quality 51-cm-long silica microfibers to stabilize the harmonic mode-locking of fiber lasers at gigahertz repetition rates, which is controllable via tuning the microfiber thickness.
All-Polarization-Maintaining Erbium-doped Mode-locked Fibre Laser Using CNT-coated PANDA Microfibre
Authors: Jin Lei , Xiang Fulin , Sugiura Yohei , Zhu Yuanjun , Ding Aiqi , Set Sze Yun , Yamashita Shinji
Published: October 2020

An all-polarization-maintaining Er-doped fibre laser was demonstrated using PANDA microfibre embedded in a CNT-PDMS composite. The PANDA microfibre had good extinction ratio and low insertion loss. Robust and efficient saturable absorption was confirmed. © 2020 The Author(s)
An Yb Fiber Laser Generating Multi-Milliwatt Picosecond Pulses with Nearly Shot-Noise-Limited Intensity Noise
Authors: Dai Gaoyu , Katoh Kazuhiro , Ozeki Yasuyuki
Published: October 2020

We propose a polarization-maintaining (PM) Yb fiber laser generating 3-ps pulses at 30 MHz with an average power of ~3.3 mW. Excess noise is suppressed under shot-noise level with several milliwatts output. © 2020 The Author(s)
Dynamics and Stability of an Optically Levitated Mirror
Authors: Lecamwasam Ruvi , Graham Alistair , Ma Jinyong , Sripathy Kabilan , Guccione Giovanni , Qin Jiayi , Campbell Geoff , Buchler Ben , Hope Joseph , Lam Ping Koy
Published: October 2020

We characterise the dynamics of a vertical Fabry-Perot cavity, where the upper mirror levitates due to radiation pressure force. The system is found naturally unstable, and we study two-laser trapping/damping schemes and photothermal effects.
A Soliton Gyroscope using Atomic Superfluids in Digital Micromirror Controlled Optical Potentials
Authors: Bell Thomas A. , Gauthier Guillaume , Baker Mark A. , Neely Tyler W.
Published: October 2020

A gyroscopic measurement scheme is developed using counter-propagating grey solitons generated around optically trapped toroidal atomic superfluids. Digital micromirror spatial light modulator experiments are envisaged to facilitate the future demonstration of this scheme. © 2020 The Author(s)
Chip-based broadband true-time delay using Brillouin scattering and phase amplification
Authors: McKay Luke , Merklein Moritz , Liu Yang , Cramer Alex , Maksymow Jordan , Chilton Andrew , Vu Khu , Choi Duk-Yong , Ma Pan , Madden Stephen J. , DeSalvo Richard , Eggleton Benjamin J.
Published: October 2020

We experimentally demonstrate a chip-based continuously tunable microwave photonic true-time delay (TTD) using Brillouin scattering and phase amplification enhancement, achieving delays of 4-ns over a bandwidth of 150-MHz utilizing approximately 10dB of on-off gain. © 2020 The Author(s)
ARRAW: Anti-Resonant Reflecting Acoustic Waveguide for efficient Brillouin scattering
Authors: Schmidt M. K. , O’Brien M. C. , Poulton C. G. , Steel M. J.
Published: October 2020

We introduce Anti-Resonant Reflecting Acoustic Waveguides (ARRAWs), implementing guidance of GHz acoustics waves through anti-resonant reflection in the cladding layer. We show that ARRAWs can simultaneously guide mid-IR optical modes, and support strong Brillouin Scattering. © 2020 The Author(s)
Acousto-optic Interactions in Silicon Photonics
Authors: Kittlaus Eric A. , Jones William M. , Rakich Peter T. , Otterstrom Nils T. , Muller Richard E. , Rais-Zadeh Mina
Published: October 2020

We demonstrate integrated, electrically-driven acousto-optic modulators by fabricating electromechanical transducers in piezoelectric aluminium nitride on a standard silicon-on-insulator waveguide platform. Phase modulation and single-sideband modulation and mode conversion from 1-5 GHz are achieved. © 2020 The Author(s).
Power-over-Fiber-based 90-GHz High-Power-Integrated Photoreceiver for High Data Rate Radio-over-Fiber
Authors: Umezawa Toshimasa , Dat Pham Tien , Kanno Atsushi , Yamamoto Naokatsu , Kawanishi Tetsuya
Published: October 2020

We present a highly efficient and high-power integrated photoreceiver for 90-GHz range radio over fiber (RoF) communications using power over fiber; the photoreceiver has demonstrated high data-rate wireless transmission up to 28.8 Gbps. © 2020 The Author(s)
Quantum random number generation on a photonic chip using single photons from hexagonal boron nitride
Authors: White Simon J. U. , Klauck Friederike , Tran Toan Trong , Schmitt Nora , Kianinia Mehran , Steinfurth Andrea , Heinrich Matthias , Toth Milos , Szameit Alexander , Aharonovich Igor , Solntsev Alexander S.
Published: October 2020

Quantum random number generation (QRNG) harnesses the intrinsic randomness of quantum mechanical phenomena. Here, we couple bright room-temperature single-photon emission from a hexagonal boron nitride atomic defect into a laser-written photonic chip and demonstrate QRNG. © 2020 The Author(s)
Acoustic diamond resonators with ultra-small mode volumes
Authors: Schmidt M. K. , Poulton C. G. , Steel M. J.
Published: October 2020

We introduce a novel acoustic cavity for a high-cooperativity orbit-phonon coupling with color centers in diamond. The enhancement of coupling is achieved by localizing the energy of a GHz acoustic mode into a deep-subwavelength volume.
Tailoring light-matter interactions in novel metastructures
Authors: Litchinitser Natalia M.
Published: October 2020

We will discuss fundamental optical phenomena at the interface of singular and nonlinear optics in engineered optical media and show that the unique properties of optical metastructures open unlimited prospects for light beam “engineering.”
High-linearity Fourier domain mode locking optoelectronic oscillator based on stimulated Brillouin scattering
Authors: Zeng Zhen , Zhang Lingjie , Zhang Zhiyao , Zhang Shangjian , Zhang Yali , Sun Bao , Liu Yong
Published: October 2020

We demonstrate a high-linearity Fourier domain mode locking optoelectronic oscillator based on electrically-controlled fast-scanning stimulated Brillouin scattering. Linearly chirped microwave waveforms with frequency sweep linearity of 1.7% and precisely- set frequency sweep range are generated.
Integrated Mikaelian Lens Implemented by Subwavelength Grating
Authors: Zhang Zunyue , Yi Dan , Wang Yi , Zhang Yaojing , Tsang Hon Ki
Published: October 2020

An integrated Mikaelian lens was designed with subwavelength grating. The device was numerically simulated and experimentally demonstrated in a compact mode size converter and an efficient S-bend connector.
Efficient CW operation of a single-emitter multi-mode laser-diode-pumped hemispherical short cavity laser by high intensity pumping
Authors: Aoyagi Y. , Kobayashi R. , Han Q. , Kawato S.
Published: October 2020

We present a highly efficient laser-diode (LD)-pumped continuous-wave (CW) short cavity Yb:YAG laser by high intensity pumping. The result showed that the optical-to- optical conversion efficiency versus incident pump power was 61%.
Detecting gravitational waves with optically-levitated nanoparticles
Authors: Howard Eric , Roberts Reece , Laplane Cyril , Volz Thomas
Published: October 2020

We propose a small-scale spaceborne probe which uses laser-cooled optically-levitated nanoparticles to search for a variety of sources associated with high frequency cosmic events, through high-precision measurements and detection of gravitational waves at micron distances.
Optical Vortex Generates a ‘Spin-Jet’ of an Ultrahigh Viscosity Au Suspension
Authors: Kawaguchi Haruki , Umesato Kei , Miyamoto Katsuhiko , Omatsu Takashige
Published: October 2020

We discover an entirely novel phenomenon, in which the optical vortex generates a spinning donor jet (‘spin-jet’) of an ultrahigh viscosity Au suspension. This phenomenon enables the super-resolution printing of Au particles.
High Raman gain directions in diamond
Authors: Kitzler Ondrej , Li Muye , Spence David J.
Published: October 2020

We show how pump and Stokes beams propagating within a {111} plane in diamond can always have polarization parallel to the highest gain direction. We propose amplifier and monolithic laser geometries benefiting from such designs.
Generation of vortex soliton molecule and cylindrical vector soliton molecule in a fiber laser
Authors: Wang Yue-e , Ma Qi-chang , Luo Zhi-chao , Xu Wen-cheng , Luo Ai-ping
Published: October 2020

We report the generation of vortex soliton molecule (VSM) and cylindrical vector soliton molecule in a fiber laser based on a mode selective coupler. ±1-order VSM, the radially and azimuthally polarized soliton molecules are realized.
Optical and Electronic Characterization of Diamond Surfaces Exposed to UV laser radiation
Authors: Moshkani Mojtaba , Downes James E. , Mildren Richard P.
Published: October 2020

Low power UV laser radiation has been previously found to etch diamond surfaces via a multiphoton process. Here we show that UV exposure also increases the NV photoluminescence and enhances hydrogen-terminated surface conductivity.
Raman suppression in LD pumped 5 kW fiber amplifier using CTFBGs
Authors: Tian Xin , Wang Meng , Hu Qihao , Zhao Xiaofan , Wang Zefeng
Published: October 2020

We report here the effective suppression of stimulated Raman scattering (SRS) in a LD directly pumped 5 kW 1080 nm fiber amplifier using chirped and tilted fiber Bragg gratings (CTFBGs). The CTFBGs are carefully designed and fabricated to match the Raman gain spectrum, and experimental results show that the SRS suppression ratio is about 27.5 dB at 5 kW.
QPSK-OFDM Optical Wireless Communication System Based on a Near-infrared VCSEL Using Convolutional Code
Authors: Chen Yingjie , Wei Zixian , Zhang Li , Zhang Kai , Cheng Julian , Dong Yuhan , Fu H.Y.
Published: October 2020

A 2-m VCSEL based optical wireless communication system is proposed with 1.13-GHz modulation bandwidth for both line-of-sight and non-line-of-sight uplinks. The system achieves a data rate as high as 6.25 Gbps utilizing convolutional coded OFDM.
High-power High-brightness Photonic Crystal Diode Laser Based on Ion Implantation
Authors: Chen Zhonghao , Qu Hongwei , Zhou Xuyan , Qi Aiyi , Wang Yufei , Zheng Wanhua
Published: October 2020

We have improved the beam quality of semiconductor lasers at high power through ion implantation and photonic crystal structure. The lasers achieved 10.2W at 11A and the brightness reached 102 MWcm–1 sr–1.
CPA Pulses for non-thermal ignition of clean and abundant Laser Boron Fusion for Electricity Generator
Authors: Hora Heinrich , McKenzie Warren , Kirchhoff Jan , Kirchhoff Götz , Miley George H. , Eliezer Shalom , Nissim Noaz
Published: October 2020

Pressures created by non-thermal forces from picosecond CPA laser pulses of extreme power can be higher than the hundred million °C temperatures for the usual ignition of fusion of clean and abundant laser boron fusion.
Design of thick polarization beam splitter based on a bridged directional coupler with 400 nm high silicon cores
Authors: Oh Seunghyun , Kim Yoohan , Kim Yudeuk , Kim Kyong Hon
Published: October 2020

We introduce a thick integrated polarization beam splitter (PBS) based on a bridged directional coupler (DC) with three planar waveguides of 400-nm-high silicon core layer. Contrary to the conventional thin DC-type PBSs using the cross coupling effect of the TM modes, the thick PBS utilizes the cross coupling effect of TE modes because the effective refractive index of the fundamental TM mode is larger than that of the fundamental TE mode in the single mode condition. At the 1,550 nm wavelength, the peak polarization-extinction-ratios (PERs) of the PBS device are calculated to be 33.81 dB and 41.09 dB for TM and TE modes, respectively, and its corresponding insertion losses (ILs) are 1.58 dB and 0.08 dB when its main input and output waveguide width, a bridge waveguide width, waveguide gap and coupling length are 190 nm, 270 nm, 560 nm, and 32.6 μm, respectively.
Liquid Crystal-Filled Dual-Core Photonic Crystal Fiber Single-Polarization Wavelength Splitter
Authors: Qiu Shi , Yuan Jinhui , Qu Yuwei , Wang Haiyun , Zhou Xian , Yan Binbin , Wang Kuiru , Sang Xinzhu , Long Keping , Yu Chongxiu
Published: October 2020

A nematic liquid crystal-filled dual-core photonic crystal fiber single-polarization wavelength splitter is proposed. The length of the splitter is 2.38 mm, and the crosstalk between the wavelengths 1.31 and 1.55 μm can achieve -68.18 dB.
Stokes Vector Based Polarization Controller for Silicon Photonic Integrated Circuits
Authors: Singh Anamika , Chugh Shivangi , Gupta Shalabh
Published: October 2020

We propose a novel Stokes Vector based adaptive polarization controller for polarization management of optical signal in photonic integrated circuits based on Stochastic Gradient Descent algorithm. The controller can be used in self coherent receivers.
Tunable 28-60 GHz Millimeter Wave Signal Generation using L-band Quantum-dash Laser
Authors: Tareq Q. , Alkhazraji E. , Ragheb A. , Esmail M. , Fathallah H. , Alshebeili S. , Khan M. Z. M.
Published: October 2020

Generation of tunable millimeter-wave signals with frequencies 60, 38, and 28 GHz are reported from an injection-locked InAs/InP quantum-dash-laser emitting in L-band, for the first time. High performance with small-linewidths and phase-noise are demonstrated.
A Study in Distinguishing BAC-Si Activation from Thermal Darkening in Bi/Er Co-doped Fiber at High Temperature
Authors: Wei Shuen , Zhang Bowen , Luo Yanhua , Peng Gang-Ding
Published: October 2020

Bismuth active center associated with silica (BAC-Si) activation and thermal darkening effect at high temperature has been distinguished in a bismuth/erbium co-doped fiber (BEDF). Activation could be achieved ahead of the severe thermal darkening effect.
Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Based on Surface Plasmon Resonance Effect
Authors: Zhang Yongxia , Yuan Jinhui , Qu Yuwei , Zhou Xian , Huo Jiahao , Qiu Shi , Yan Binbin , Wang Kuiru , Sang Xinzhu , Long keping , Yu Chongxiu
Published: October 2020

We design a dual-core photonic crystal fiber (PCF) polarization beam splitter (PBS) based on surface plasmons resonance effect. The maximum extinction ratio of the PBS can be up to -160.56 dB at wavelength 1.55 μm.
Experimental Demonstration of a 32 Gb/s Reconfigurable Logic Gate Using a Dual-Drive Mach-Zehnder Modulator
Authors: Ding Min , Tang Xianfeng , Zhao Jia , Zhang Xiaoguang , Xi Lixia
Published: October 2020

We propose a scheme to implement logic operation in optical domain based on the interference in a dual-drive Mach-Zehnder modulator which can be easily reconfigured to realize all the basic types of logic gates. Experiments have been successfully carried out at the speed of 32 Gb/s.
Fiber Nonlinearity Compensation using the Extended Kalman Filter
Authors: Li Xue , Zheng Zibo , Xi Lixia , Zhang Xiaoguang
Published: October 2020

In this paper, a fiber nonlinearity compensation scheme using the extended Kalman filter was proposed which has been proved to posses a compatible performance but less computational complexity to be compared with the conventional solution.
Multiple Nonlinear Regression-Based Adaptive Colour Model for Smartphone Colorimeter
Authors: Rani Saptami , Hossain Arafat , Biswas Protik Chandra , Islam Md Rafiqul , Canning John
Published: October 2020

A self-contained smartphone-based colorimetric sensing platform adaptable for multiple analytes is demonstrated. Concurrent variation of multiple optical sensing parameters is addressed using multiple nonlinear regression analysis.
Uptake Study of Gold Nanoparticles into Cancer Cells Using High-Order Image Correlation Spectroscopy
Authors: Katoozi D. , Clayton A. H. A. , Moss D. J. , Chon J. W. M.
Published: October 2020

Non-destructive nanoparticle cellular uptake characteristic method, High order Image Correlation Spectroscopy (HICS) combined Confocal Laser Scanning Microscopy (CLSM) is used to get information about cellular uptake and aggregation of 40 nm gold nanosphere (AuNSs) in HeLa cell. The technique was able to reproduce the previous uptake data in the literature.
Detection of Viral Infection and Subsequent Apoptosis in Cells by Raman Scattering Microspectroscopy
Authors: Ikejiri Masahiro , Oba Mami , Ito Terumasa , Wen Rongduo , Mizutani Tetsuya , Misawa Kazuhiko
Published: October 2020

We detected infection of cloned porcine kidney (CPK) cells by porcine parvoviruses using Raman scattering microscopy. The spectral change in the early stage after viral infection was clearly distinguished from that in the late stage of induced apoptosis.
Dynamic Optical Strain Sensing
Authors: Sitpathom Nonthanan , Muangnapoh Tanyakorn , Dawes Judith M
Published: October 2020

We demonstrated a dynamic strain sensor consisting of a flexible polydimethylsiloxane film patterned by a self-assembled array of polystyrene beads. The time-response of the diffracted light was monitored as the film was stretched.
Experimental Research on Water Chroma Measurement Using Plastic Optical Fiber Technology
Authors: Taojiang Wu , Bin Tang , Fengxiao Li , Renjie Wang , Tao Song
Published: October 2020

The research use the transmission method and plastic optical fiber sensors to measure water chroma. The sensitivity of the optical fiber sensor is 2.65 times that of the transmission method, and the relative error is 3.2%.
Non-destructive Detection of Chilling-Injured Kiwifruit by a Dual Laser System
Authors: Wang Zhen , Sun Jason , Künnemeyer Rainer , McGlone Andrew , Burdon Jeremy
Published: October 2020

This study reports the development of a dual laser system for detecting chilling injury in kiwifruit. The system performed well and had an error rate of 0% for separating advanced chill damaged fruit.
Stereoscopic audio-band vibrometry with source triangulation and interferometric sensitivity
Authors: Zhang Ya , Zhao Yuwei , Bandutunga Chathura P. , Gray Malcolm B. , Chow Jong H.
Published: October 2020

We demonstrate audio-band vibrometric measurements with interferometric precision using Digitally Enhanced Heterodyne Interferometry. We use the integrated time-of-flight readout from two multiplexed, spatially separate receivers to triangulate the source position down to 20 cm precision.
Absorption enhancement of WS2 monolayer based on Si3N4 nanowires
Authors: Al-Ani Ibrahim , Huang Lujun , As’ham Khalil , Aboutorab Neda , Klochan Oleh , Boriskna Svetlana , Miroshnichenko Andrey , Hattori Haroldo T.
Published: October 2020

We show that the addition of an array of silicon nitride nanowire resonator can boost the absorbance of a monolayer of WS2 from around 5-10% to 62% at the exciton wavelength of 620 nm.
Holographic augmented reality near-eye display using Pancharatnam-Berry phase lens
Authors: Nam Seung-Woo , Moon Seokil , Lee Chang-Kun , Lee Hong-Seok , Lee Byoungho
Published: October 2020

Holographic augmented reality near-eye display using an eyepiece made of Pancharatnam-Berry phase lenses is proposed. Adopting Pancharatnam-Berry phase lenses makes it possible to construct a large field of view near-eye display with a focus cue.
Revisiting the Effect of Inert Shell on Luminescence Enhancement of Upconversion Nanoparticles
Authors: Ren Peng , Zheng Xianlin , De Camillis Simone , Piper James A. , Lu Yiqing
Published: October 2020

We explore the power-dependent emission of upconversion nanoparticles with respect to inert shell coating. The inert-shells lower the excitation intensity requirement, but not increase the ultimate brightness at the saturation region.
Low cost mode-locked laser source for two-photon microscopy
Authors: Al-Rubaiee Mohanad , Young James , Mattison Scott
Published: October 2020

The objective of this project is to develop a low cost laser source for two-photon microscopy for increasing optical resolution and contrast to be used for research and deep imagining purposes.
Dynamic light storage in cascaded nanocavities
Authors: Wu Jun-Fang , Zeng Liu-Ying , Chen Jia-Hui , Xu Zhe-Ming , Li Chao
Published: October 2020

We design a compact photonic crystal system to effectively trap, store and release a signal pulse on demand, based on controllable EIT-like effect in dynamically tuned cascaded nanocavities.
Temperature Measurement of Water Vapor by Adaptive Dual Comb Spectroscopy
Authors: Yang Kangwen , Chen Xu , Li Hai , Hu Dongshuai , Huo Ran , Hao Qiang , Yan Ming , Huang Kun , Zeng Heping
Published: October 2020

Absorption spectroscopy of water vapor by adaptive dual-comb spectroscopy was demonstrated to measure the temperature at 800 K with a relative deviation of 3.5%, providing a new method for non-invasive combustion diagnosis.
Dispersion Engineering by Liquid Filled in Microbubble Resonators
Authors: Chen Zhenmin , Li Qian , Fu H. Y.
Published: October 2020

We numerically investigate the dispersion of a microbubble resonator (MBR) with different wall thickness and filled with liquid inside the MBR for the first and second order radial modes. This provides us a flexible dispersion engineering method for the microcavities.
1μm dispersive wave generation in highly nonlinear fiber
Authors: Lin Tianyu , Tang Bocheng , Wei Haoyun , Li Yan
Published: October 2020

A 1-1.1 μm dispersive wave is generated by near-infrared frequency comb in a highly nonlinear fiber. We identified the appropriate parameters for the generation of dispersive wave for DFG based mid-infrared frequency comb.
Pulsewidth dependence of the nonlinear refractive index of Air
Authors: Hagan David J. , Munera Natalia , Tofighi Salimeh , Van Stryland Eric
Published: October 2020

We use the ultrafast response function of air to predict the pulsewidth dependence of from measurements in the near and mid-infrared showing no dispersion. This allows predictions of the dependence of n
nnnnn
on altitude.
Engineering Spin Domains in a Binary BEC
Authors: Pritchard Alexander , Bell Thomas A. , Colas David , Baker Mark , Rubinsztein-Dunlop Halina
Published: October 2020

2-component BEC, confined in an all optical line trap, we use a spin-dependent optical barrier beam to localise one of the spin components. By time-averaging the beam we can furthermore create multiple spin sites.
Quantum magnetic sensor using fibre-cavity diamond nitrogen-vacancy centre laser
Authors: Nair Sarath Raman , Rogers Lachlan J. , Roberts Reece P. , Volz Thomas , Greentree Andrew D. , Abe Hiroshi , Ohshima Takeshi , Yatsui Takashi , Vidal Xavier , Jeske Jan
Published: October 2020

We study the engineering of quantum magnetic sensor using laser generated from diamond nitrogen-vacancy (NV) centres in fibre cavity. The projected sensitivity of such a sensor is of the order of pT / Hz1/2.
Photonic Quantum Error Correction of Qudits Using W-state Encoding
Authors: Ramakrishnan Rohit K. , Ravichandran Aravinth Balaji , Talabattula Srinivas , Vijayan Madhav Krishnan , Lund Austin P. , Rohde Peter P.
Published: October 2020

In this paper, we present a passive linear optics error correction scheme for qudits using W-state encoding, based on post selection, which reduces the effects of dephasing noise in photonic quantum communication.
Building a Benchmark System for Nonlinear Fourier Transform Algorithms
Authors: Zhang Wen Qi , Chan Terence H. , Vahid Shahraam Afshar
Published: October 2020

Comparing one’s own nonlinear Fourier transform algorithm to others is a time consuming and repetitive work. To benefit the research community, a benchmarking approach is proposed for building a standardized and easy to apply toolset.
Microfiber knot assisted soliton rains emission from square-wave-like pulse in an erbium-doped fiber laser
Authors: Zhou Jian , Zhao Junqing , Li Lei , Zhao Luming
Published: October 2020

By introducing a microfiber knot, it is for the first time observed that soliton rains can be emitted from a type of square-wave-like pulse in an ultralong erbium-doped fiber laser.
Coexistence of dark and anti-dark solitons in a fiber laser
Authors: Hu X. , Guo J. , Zhao L. M. , Tang D. Y.
Published: October 2020

We report on the experimental observation of coexistence of dark and anti-dark solitons in a specially designed fiber laser. Numerical simulations also confirmed the experimental observation.
Direct temporal mode determination for the characterization of temporally multiplexed high dimensional quantum entanglement
Authors: Li Xiaoying , Huo Nan , Liu Yuhong , Li Jiamin , Chen Xin , Ou Z. Y.
Published: October 2020

We report a direct method that measures the exact form of temporal modes. We then apply this method to a pulse-pumped parametric amplifier and demonstrate telecom band temporally multiplexed multi-dimensional continuous variables quantum entanglement.
Single-Layer Edge Detecting Metalens with Combining Lens and Spiral Phase Profiles
Authors: Kim Young Jin , Kim Changhyun , Lee Byoungho
Published: October 2020

Combining conventional hyperbolic phase profile with spiral phase, we propose a single-layer metalens which can optically extract edge information. This device reduces the imaging and edge detection functionalities to single metasurface.
Spectral broadening of high-intensity 1030-nm sub-picosecond laser pulses in BaWO4 crystal
Authors: Kinyaevskiy I.O. , Kovalev V.I. , Danilov P.A. , Smirnov N.A. , Kudryashov S.I. , Dunaeva E.E. , Ionin A.A.
Published: October 2020

Peculiarities of supercontinuum emission generated by sub-picosecond near-IR laser pulses in BaWO4 crystal was experimentally studied. Nonlinear effects contributing to the output spectrum are discussed. Stimulated Raman scattering self-seeded by self-phase modulation emission was observed.
Determining the advantage of quantum radar
Authors: Koumi Zachary , Sparkes Ben , Swierkowski Leszek , Drake Sam , Ottaway David
Published: October 2020

We discuss our progress towards creating a computer model of a quantum illumination type quantum radar. This will allow us to determine the quantum advantage from several important initial experimental demonstrations.
Simple autofocusing method by image processing for two-photon lithography
Authors: Furukawa Taichi , Fujishiro Yoko , Maruo Shoji
Published: October 2020

We propose a simple autofocusing method for two-photon lithography with an accuracy of sub-micron scale. We achieved the autofocusing by image processing using transmission images of photopolymerized voxels and demonstrated mass-fabrication of spiral square structures.
High-dimensional communication on etchless lithium niobate platform with photonic bound states in the continuum
Authors: Yu Zejie , Tong Yeyu , Tsang Hon Ki , Sun Xiankai
Published: October 2020

High-order bound states in the continuum were investigated and applied to etchless lithium niobate platform, demonstrating mode (de)multiplexing and high-dimensional communication with insertion loss <4.0 dB and crosstalk <–9.5 dB in a 70-nm wavelength band.
Experimental Demonstration of Single-mode Topological Valley-Hall Lasing Controlled by the Degree of Asymmetry
Authors: Noh Wanwoo , Nasari Hadiseh , Kim Hwi-Min , Le-Van Quynh , Jia Zhetao , Huang Chi-Hsin , Kanté Boubacar
Published: October 2020

We demonstrate a single-mode valley-Hall laser at telecommunication wavelength. The degree of asymmetry in a honeycomb photonic crystal governs light confinement regimes in the valley-Hall cavity and enables efficient single-mode operation despite multiple modes.