bluuebunny/crossref_metadata_2025 huggingface dataset:
THz optical solitons in quantum cascade double ring lasers
Authors: Micheletti Paolo , Senica Urban , Forrer Andres , Cibella Sara , Torrioli Guido , Frankié Martin , Faist Jérôme , Beck Mattias , Scalari Giacomo
Published: July 2023

We report THz optical soliton formation in defect-less ring QCL featuring anomalous dispersion. Free-running spectra with sech2 envelopes are presented together with SWIFT measurement showing ∼12 ps pulses in the reconstructed emission time-profile.
Fully Integrated High-resolution Speckle Spectrometer Using Linear Coherent Network of Random Resonators
Authors: Zhang Zunyue , Wang Yi , Li Peian , Xue Ying , Lau Kei May , Tsang Hon Ki
Published: July 2023

A monolithic spectrometer is formed by a compact linear coherent network of random resonators. The spectrometer is integrated with on-chip photodetector for direct signal readout and has 40-pm spectral resolution and 8-nm working bandwidth.
Integrated Spectrometer Based on Arrayed Waveguide Grating and PbS Colloidal Quantum Dot Photodiode Array
Authors: Pang Chao , Deng Yu-Hao , Kheradmand Ezat , Petit Robin , Elsinger Lukas , Christophe Detavernier , Geiregat Pieter , Hens Zeger , Van Thourhout Dries
Published: July 2023

An integrated spectrometer based on arrayed waveguide grating and PbS colloidal quantum dot photodiode array was demonstrated on the silicon nitride photonic platform, operating around 1300 nm, which might be an attractive low-cost integration routine.
Rapid Thermal Annealing of InAlGaAs/GaAs Quantum Dot Lasers for Sub-900 nm Emission
Authors: Arefin Riazul , You Weicheng , Uzgur Fatih , Liang Baolai , Arafin Shamsul
Published: July 2023

Molecular beam epitaxy-grown InAlGaAs/GaAs quantum dot lasers were grown, fabricated, and characterized for sub-900 emission. Rapid thermal annealing improves the optoelectronic properties of the lasers, leading to small reverse-leakage current and low threshold current density.
Two-Dimensional Reconfigurable Imaginary Gauged Laser Array
Authors: Gao Zihe , Qiao Xingdu , Pan Mingsen , Wu Shuang , Yim Jieun , Chen Kaiyuan , Midya Bikashkali , Ge Li , Feng Liang
Published: July 2023

We demonstrate the first integrated two-dimensional laser array with a reconfigurable synthetic imaginary gauge field. The point-gap topology in this non-Hermitian system manifests as skin modes, which enable persistent phase locking compatible with mode shaping.
Strong quantum mechanical squeezing based on nonlinear dispersive loss in semiconductor lasers
Authors: Pontula Sahil , Sloan Jamison , Rivera Nicholas , Soljačić Marin
Published: July 2023

We predict that a combination of frequency-dependent outcoupling and optical non-linearity in semiconductor lasers can create sharply intensity-dependent loss that squeezes inten-sity noise far below the shot noise limit.
Status of the ZEUS laser user facility
Authors: Willingale Louise , Maksimchuk Anatoly , Nees John , Bayer Franko , Burger Miloš , Campbell Paul T. , Hou Bixue , Jovanovic Igor , Kalinchenko Galina , Kuranz Carolyn C. , Ma Yong , McKelvey Andrew , Thomas Alexander G. R. , Weinberg Lauren , Zhang Qing , Krushelnick Karl M.
Published: July 2023

The Zettawatt Equivalent Ultrashort pulse laser System (ZEUS) is a 3-Petawatt user facility funded by the National Science Foundation and is due to be commissioned in late 2023. The facility will explore high-field science and applications.
Breather Dynamics in Ultrafast Fibre Lasers and Their Intelligent Control
Authors: Boscolo Sonia , Peng Junsong , Wu Xiuqi , Zhang Ying , Finot Christophe , Zeng Heping
Published: July 2023

We review our recent work on the dynamics of breathing solitons in fibre lasers, including single breathers, breather molecular complexes, breather explosions and breather frequency locking at Farey fractions, and their control by genetic algorithms.
Continuously Tunable All-Polarization-Maintaining Fiber Laser Based on a Compact Lyot-Filter/SA Hybrid
Authors: Liu Bowen , Shirahata Takuma , Yamashita Shinji , Set Sze Yun
Published: July 2023

A compact Lyot-filter/SA hybrid that offers extra tunable degrees of freedom is proposed to support continuous wavelength tuning and dual-wavelength mode-locking with low free-running wavelength shift in an all-polarization-maintaining fiber laser.
Broadband continuous supersymmetric transformation: a new paradigm for transformation optics
Authors: Yim Jieun , Chandra Nitish , Feng Xilin , Gao Zihe , Wu Shuang , Wu Tianwei , Zhao Haoqi , Litchinitser Natalia M. , Feng Liang
Published: July 2023

Supersymmetry provides a new paradigm for transformation optics. We experimentally demonstrate broadband continuous supersymmetric transformation by designing a novel metamaterial on a Si platform for advanced control of the spatial characteristics of light.
Dynamical encircling of an exceptional point in anti-PT-symmetric integrated photonic systems
Authors: Feng Ziyao , Sun Xiankai
Published: July 2023

We experimentally demonstrated encircling of an exceptional point with a fixed loss rate in a compact anti-PT-symmetric integrated photonic system, where chiral transmission was achieved with a device length of only 70 μm.
Continuous-Wave Photon-Pair Generation in Amorphous Hydrogenated Silicon
Authors: Alexander Kasper , Ulvenberg Thjalfe , Girouard Peter , Koefoed Jacob , Rishøj Lars , Rottwitt Karsten
Published: July 2023

We demonstrate generation of highly correlated photon pairs via spontaneous four-wave mixing driven by continuous-wave pumping in a hydrogenated amorphous silicon waveguide and obtain a coincidence-to-accidental ratio of 106.2±1.3.
Quantum cascade laser frequency comb tuning dynamics with rf-injection
Authors: Liu Jie , Skochinski Phil , Hughes Lawrence , Dikmelik Yamac , Lascola Kevin , Wysocki Gerard
Published: July 2023

We demonstrate precise control of quantum cascade laser frequency comb repetition rate through rf-injection. The observed optical frequency tuning of comb modes indicates completely different comb dynamics with rf-injection as compared to conventional current/thermal tuning.
Multimode fiber microcomb and beyond
Authors: Nie Mingming , Huang Shu-Wei
Published: July 2023

We demonstrate spatiotemporally mode-locked and phase-independent turnkey Kerr soliton microcomb through backward Brillouin effect, as well as coexisting forward Brillouin lasers with squeezed phase noise, based on an ultrahigh-quality-factor Fabry-Perot microresonator made of multimode fiber.
Periodic Shadowing for Improved Temporal Resolution in Streak Cameras
Authors: Kornienko Vassily , Bao Yupan , Bood Joakim , Ehn Andreas , Kristensson Elias
Published: July 2023

Streak cameras are central to measurements across the sciences. By spatially modulating the entrance slit, we show a more than 20% increase in temporal resolution opening up for sub-picosecond measurements with standard streak camera systems.
Nonlinear time-resolved spectroscopy with extremely high temporal dynamic range
Authors: Flöry T. , Stummer V. , Pupeikis J. , Willenberg B. , Nussbaum-Lapping A. , de Almeida Camargo F. Valduga , Barkauskas M. , Phillips C. R. , Keller U. , Cerullo G. , Pugzlys A. , Baltuska A.
Published: July 2023

We present nonlinear time-resolved spectroscopy based on time filtering of femtosecond frequency combs by pulse gating in a dual-channel amplifier delivering millijoule energies with electronically-tunable femtosecond-precise delays of output pulses from femtoseconds to milliseconds.
Non-volatile reconfigurable metasurface for free-space phase-only modulation
Authors: Fang Zhuoran , Chen Rui , Fröch Johannes E. , Tanguy Quentin , Khan Asir Intisar , Wu Xiangjin , Mana Arnab , Sharp David , Munley Christopher , Reynolds Matthew , Pop Eric , Majumdar Arka
Published: July 2023

We demonstrated a nonvolatile electrically reconfigurable metasurface based on low-loss phase-change materials Sb2Se3 with phase-only (~0.25π) modulation in the free-space. The tunable metasurface is robust against reversible switching over 1,000 times.
High-Q thin film lithium niobate microrings fabricated with wet etching
Authors: Zhuang Rongjin , He Jinze , Hu Haifeng , Qi Yifan , Xu Lihua , Chu Weiguo , Li Yang
Published: July 2023

Using wet etching method, we realized microrings with intrinsic quality factor over 1.19 × 107 based on thin film lithium niobate on insulator. This method features low cost, high throughput and high reproducibility.
Endogenous BOTDA in Self-Homodyne Coherent Detection Transmission System
Authors: Zhang Mingming , Wei Weilun , Li Weihao , He Huan , Chen Can , Chen Yizhao , Wu Hao , Zhao Can , Zhao Zhiyong , Tang Ming
Published: July 2023

Embedded with 400-Gbps self-homodyne coherent transmission architecture, an endogenous Brillouin optical time-domain analyzer is proposed and achieved with a spatial resolution of 3 meters and a relative frequency error < 2 MHz.
Sub-wavelength InP lasers selectively grown on SOI
Authors: Xu Ke , Xue Ying , Li Jie , Xing Zengshan , Wong Kam Sing , Lau Kei May
Published: July 2023

We report sub-wavelength InP lasers selectively grown on (001) silicon-on-insulator (SOI) wafers. Detailed characterizations were performed to study the effect of different laser cavities. The sub-wavelength laser features a low lasing threshold of 120 μJ/cm2 and a spontaneous emission factor of around 0.7.
Temperature-insensitive 2 mL Optical Reference Cavity with a Microfabricated Mirror
Authors: McLemore Charles A. , Jin Naijun , Kelleher Megan L. , Mason David , Luo Yizhi , Lee Dahyeon , Rakich Peter , Diddams Scott A. , Quinlan Franklyn
Published: July 2023

We present a 466,000 finesse, 2 mL optical reference cavity for a strontium lattice optical clock, featuring a microfabricated curved mirror, first-order insensitivity to temperature fluctuations, and low phase noise consistent with 10
−
14 performance.
Coupling monolayer transition metal dichalcogenide to a strain-tunable photonic crystal cavity
Authors: Manna Arnab , Fröch Johannes E. , Pumulo Sinabu , Cenker John , Barnard Arthur , Xu Xiaodong , Majumdar Arka
Published: July 2023

We demonstrate a large in-situ strain tuning of cavity coupled photoluminescence of nanofabricated optical cavities integrated with a monolayer WSe2 using a piezo-strain device capable of operating at cryogenic temperatures.
Ultrafast Optical Carrier Dynamics in Multi/Few-Layer MoS2 on a Microdisk Resonator
Authors: Kudalippalliyalil Ramesh , Prakash Gyan , Murphy Thomas E. , Grutter Karen E.
Published: July 2023

We employ a silicon nitride microdisk resonator to observe the transient dynamics of photoexcited carriers in multi-layer and few-layer MoS2 exfoliated flakes.
XPM Phase Noise Mitigation in Long-haul WDM Coherent Systems by Digitally Up-converting OSC Baseband
Authors: Zhang Jie , Chen Zhuo , Dai Xiaoxiao , Mei Liang , Du Ping , Wang Yaqin , Yang Qi , Liu Deming
Published: July 2023

We proposed a simple OSC coding method to mitigate the OSC-induced nonlinear phase noise in high-speed DWDM system. Experimental results show that the OSNR budget on the 400G channel of 1280-km transmission is improved by 0.96 dB. (e-mail: cstech@optica.org).
Meta-optic accelerators for object classifier
Authors: Zheng Hanyu , Liu Quan , Zhou You , Kravchenko Ivan I. , Huo Yuankai , Valentine Jason
Published: July 2023

A meta-optic platform for accelerating object classification is demonstrated. End-to-end design is used to co-optimize the optical and digital systems resulting in a high-speed and robust classifier with 93.1% accuracy in classifying handwritten digits.
Electric Field Sampled Dual Frequency Comb Spectroscopy in Real Time Based on Ultrafast Cr:ZnS Laser Platform
Authors: Konnov Dmitrii , Muraviev Andrey , Vasilyev Sergey , Vodopyanov Konstantin L.
Published: July 2023

We report the first demonstration of electro-optical sampling using two mutually coherent Cr:ZnS frequency combs. We recorded comb-mode resolved spectra of ammonia (8 –12 µm) with high dynamic range and in real time.
Cavity-Enhanced Single-Photon Emission from Artificial Atoms in Silicon
Authors: Saggio Valeria , Errando-Herranz Carlos , Gyger Samuel , Gerlach Connor , Panuski Christopher , Prabhu Mihika , De Santis Lorenzo , Ornelas-Huerta Dalia , Christen Ian , Raniwala Hamza , Colangelo Marco , Englund Dirk
Published: July 2023

We show enhanced single-photon emission from artificial atoms in silicon by coupling them to cavities with high quality factors and small mode volumes, thus enabling enhanced light-matter interactions which are crucial for quantum technologies.
Amplitude and Phase Retrieval of Optical Pulses Using A Silicon Photonics Optical Correlator
Authors: Kondo Keisuke , Oshima Hiroki , Sugihara Okihiro
Published: July 2023

We propose retrieval of amplitude and phase of optical pulses using a silicon photonics optical correlator and tunable filter. The amplitude and phase of pico-second pulses with and without frequency chirp were successfully retrieved.
Spatiotemporal nonlinear phenomena in gas-filled capillary fibers
Authors: Piccoli R. , Jeong Y.-G. , Rovere A. , Zanotto L. , Légaré F. , Morandotti R. , Schmidt B. E. , Razzari L.
Published: July 2023

We show how gas-filled capillary fibers represent a unique platform to explore ultrafast spatiotemporal nonlinear dynamics. We review our recent results including extreme pulse compression, ultra-broad Raman red-shift, and few-cycle visible light generation.
Coherent mid-infrared supercontinuum generation in a cascade of silica, fluoride, and chalcogenide fibers
Authors: Shamim Md Hosne Mobarok , Alamgir Imtiaz , Rochette Martin
Published: July 2023

We present a supercontinuum spanning 1.8 µm to 3.2 µm from a passive cascade of anomalous silica fiber, anomalous ZBLAN fiber, and all-normal chalcogenide fiber taper. The resulting supercontinuum preserve coherence despite the cascaded architecture.
Decreasing SNSPD Jitter to Sub-3 ps Upon Increased Photon Illumination
Authors: Jaha Roland , Beutel Fabian , Wolff Martin A. , Schuck Carsten , Pernice Wolfram , Ferrari Simone
Published: July 2023

We investigate the timing accuracy of SNSPDs under illumination with varying photon numbers and find a reduction of latency time by more than 100 ps as well as sub-3 ps jitter at high photon flux.
An integrated Si3N4 Row Decoder Circuit for Addressable Optical RAM Banks
Authors: Simos Stelios , Moschos Theodoros , Vagionas Chris , Alexoudi Theoni , Fotiadis Konstantinos , Chatzitheocharis Dimitrios , Sacchetto Davide , Zervas Michael , Pleros Nikos
Published: July 2023

We demonstrate experimentally an integrated Si3N4 photonic 2x4 Row Decoder that utilizes a MRR-based wavelength filtering bank for successfully addressing one out of four RAM rows within an optical RAM bank architecture.
Compact Surface-Normal Coherent Receiver with Wire-Grid Polarizers
Authors: Soma Go , Yanwachirakul Warakorn , Miyazaki Toshiki , Kato Eisaku , Onodera Bunta , Tanomura Ryota , Fukui Taichiro , Ishimura Shota , Sugiyama Masakazu , Nakano Yoshiaki , Tanemura Takuo
Published: July 2023

We present a broadband and compact coherent receiver in a surface-normal configuration using wire-grid polarizers. Demodulation of 64-Gbaud QPSK and 50-Gbaud 16QAM signals as well as ultra-wideband operation covering 1260-1630 wavelength bands are demonstrated experimentally.
Microring-based programmable coherent optical neural networks
Authors: Wang Jiahui , Rodrigues Sean P. , Dede Ercan M. , Fan Shanhui
Published: July 2023

We design, simulate, and train a coherent optical neural network fully based on microring resonators including the linear multiplication and the reconfigurable nonlinear activation components, which shows advantages in terms of device footprint and energy efficiency.
Frequency-Conversion via Intermodal Bragg-Scattering in a Few Moded Fiber
Authors: Bolotov Denis , Vandborg Mads Holmark , Rottwitt Karsten , Rishøj Lars Søgaard
Published: July 2023

We demonstrate a process for frequency-conversion via intermodal Bragg-scattering capable of converting between a signal and idler separated by >600 nm. Pumps separation was tuned from 0-20 nm with conversion efficiency up to -23dB.
Fast Long-Wave Infrared Hyperspectral Imaging for Technical Art History
Authors: Charsley Jake M. , Botticelli Michela , Risdonne Valentina , Visser Tess , Young Christina , Smith Margaret J. , Rutkauskas Marius , Altmann Yoann , Reid Derryck T.
Published: July 2023

We demonstrate material classification of painted cultural heritage using a novel full-field, 700–1400-cm-1 Fourier-transform spectrometer, enabling fast, non-invasive imaging. Spectroscopic imaging is demonstrated of the painting ‘Uplands in Lorne’ from Glasgow University's Hunterian Collection.
Single-Chip Laser Source with Linear FMCW LiDAR Chirp
Authors: Ahmed Abu Naim R. , Byrd Matthew J. , Poulton Christopher V. , Russo Peter , Paquette David , Shatrovoy Oleg , Watts Michael R.
Published: July 2023

We present a single-chip hybrid integrated laser source that contains an on-chip delay line for linear FMCW LiDAR chirp. The demonstrations shows the feasibility of chirp linearization without the need for long external optical delays.
Enhancing Thermo-Optic Tuning in Low-Loss Silicon Nitride Photonic Integrated Circuits
Authors: Pruessner Marcel W. , Tyndall Nathan F. , Stievater Todd H.
Published: July 2023

We modify a recently developed low-loss silicon nitride foundry platform using high-thermooptic-coefficient cladding materials. The large cladding modal overlap enables a measured five-fold improvement in the thermo-optic tuning efficiency.
Low Stress Bilayer LPCVD-PECVD SiN Waveguides for Kerr Frequency Comb Generation
Authors: McNulty Karl J. , Ji Xingchen , Gil-Molina Andres , Corato-Zanarella Mateus , Bhatt Gaurang R. , Datta Ipshita , Chaitanya Shriddha , Okawachi Yoshitomo , Gaeta Alexander L. , Lipson Michal
Published: July 2023

We demonstrate a foundry-compatible platform based on bilayer LPCVD-PECVD SiN waveguides. Using microrings fabricated from our bilayer waveguide, we show a Kerr soliton frequency comb spanning 300 nm with 125 mW of pump power.
Characterization of Kerr Microcombs for Quantum Technology
Authors: Liu Fengyu , Chembo Yanne K.
Published: July 2023

Quantum microcombs allow for the efficient generation of twin-photons via spontaneous four-wave mixing in resonantly pumped microresonators. We here develop a frequency-bin theoretical framework that permits to determine their density operator.
Multi-pixel photoconductive THz emitters for active beam shaping and polarisation control
Authors: Chopra N. , Deveikis J. , Lloyd-Hughes J.
Published: July 2023

Multi-pixel THz photoconductive emitters are an emerging class of THz source that can extend the capabilities of THz time-domain spectrometers and THz imaging systems dramatically. Here we report our recent work using pixel arrays to steer and shape the transverse profile of a THz beam. Further, pixel arrays containing orthogonal elements can be used to generate linear, circular, radial or azimuthal THz beams, where the polarisation purity can be dynamically tuned electrically.
Building Directionally Intelligent Terahertz Leaky-Wave Antennas with Deep Learning
Authors: Neronha Joshua , Guerboukha Hichem , Mittleman Daniel M.
Published: July 2023

We propose a solution to the terahertz free-space path loss problem by proposing and experimentally validating a deep-learning model which can output leaky-wave antenna designs that emit multidirectional beam with a user-specified far-field pattern.
Deep Learning Enabled Reconfigurable Terahertz Holograms with Cascaded Diffractive Optical Elements
Authors: Jia Wei , Lin Dajun , Sensale-Rodriguez Berardi
Published: July 2023

This work demonstrates the design, fabrication, and measurement of cascaded diffractive optical elements to enable the realization of reconfigurable terahertz holograms by altering either the number, spacing, order and rotational alignment of the elements.
Controlling ultrafast laser writing with pulse temporal contrast
Authors: Wang Huijun , Lei Yuhao , Shayeganrad Gholamreza , Kazansky Peter G.
Published: July 2023

The effect of temporal contrast of femtosecond laser pulses on nanostructuring of silica glass is demonstrated. Nanopore-based modifications are created with a contrast of 107, while stronger birefringence is observed with reduced contrast of 103.
Selective laser crystallization of germanium in amorphous Ge/Si multilayer stacks
Authors: Volodin Vladimir A. , Cheng Yuzhu , Bulgakov Alexander V. , Levy Yoann , Beránek Jiří , Nagisetty Siva S. , Zukerstein Martin , Popov Alexander A. , Bulgakova Nadezhda M.
Published: July 2023

Selective laser crystallization of germanium in multilayer stacks consisting of alternating amorphous nanosized films of silicon and germanium deposited on silicon and glass substrates has been achieved using near- and mid-infrared ultrashort laser pulses.
Piezoelectric Programmable Optical Mode Conversion in a Photonic Integrated Circuit
Authors: Larocque Hugo , Dong Mark , Leenheer Andrew , Gilbert Gerald , Eichenfield Matt , Englund Dirk
Published: July 2023

Waveguide-based optical mode conversion requires wavelength-scale patterning of the waveguide's optical properties. We implement a programmable version of this patterning with piezoelectrically actuated photonics.
Wafer-Scale Atomic-Layer-Deposition of Er3+- and Yb3+- Doped Gain Materials for Integrated Photonics
Authors: Liapis Andreas C. , Pelgrin Vincent , Liu Peng , Cui Xiaoqi , Rosa José M.A. , Seppännen Heli , Li Diao , Reduto Igor , Honkanen Seppo , Lipsanen Harri , Sun Zhipei
Published: July 2023

We demonstrate highly-doped Er3+ and Yb3+ doped gain media on SiN waveguides by plasma-enhanced atomic layer deposition, showing great potential for integrated lasers and amplifiers.
HfO2-based Platform for High Index Contrast Visible and UV Integrated Photonics
Authors: Jaramillo Oscar , Massai Leonardo , Mehta Karan
Published: July 2023

We study HfO2/Al2O3 composites for high-index visible/UV photonics, exhibiting material losses of < 3.0 dB/cm and n = 1.96 at λ = 405 nm. Single-mode waveguides losses are 15.3 ± 1.9 dB/cm for λ = 405 nm (2.3 ± 0.1 dB/cm for λ = 730 nm), likely limited by sidewall roughness scattering.
Development of Free-Form Fibers with Square Mode and Flat Intensity Distribution
Authors: Buczyński Ryszard , Nguyen Hue Thi , Pysz Dariusz , Kasztelanic R.
Published: July 2023

A use of the nanostructuring approach allows shaping intensity distribution to form a fundamental mode into a square cross-section and flat top-hat intensity distribution in the fiber. A proof-of-concept silica nanostructured fiber with 24 µm core is developed and characterized. We have demonstrated a square mode propagation with top-hat intensity distribution.
Low-optical-pumping-threshold InGaAs/GaAs Nano-ridge Laser Monolithically Grown on 300 mm Silicon Substrate
Authors: Ouyang Z. , Fahmy E. M. B. , Colucci D. , Yimam A. A. , Kunert B. , Van Thourhout D.
Published: July 2023

Amorphous-silicon-grating-on-top DFB-InGaAs/GaAs-laser directly grown on silicon substrate by nano-ridge engineering technique exhibits 2.5 kW/cm2 lasing threshold, 10 times smaller than nano-ridge laser with etched grating, due to avoiding introducing carrier loss path at GaAs-air surface.
Toward hybrid integration of exotic materials in an electronic-photonic CMOS platform via substrate removal
Authors: Onural Deniz , Gevorgyan Hayk , Eschenbaum Carsten , Koos Christian , Popovič Miloš
Published: July 2023

We demonstrate direct access to the silicon device layer of a monolithic CMOS electronics-photonics platform with a full-digital back-end-metal stack, in post-fabrication at die level, allowing the integration of functional materials (e.g. into slot waveguides).
Self-Injection-Locked Kerr Soliton Microcombs With Photonic Wire Bonds For Use in Terahertz Communications
Authors: Chen Y. , Peng H. , Fang D. , Dittmer J. , Lihachev G. , Voloshin A. , Skacel S. T. , Lauermann M. , Tessmann A. , Wagner S. , Bhave S. , Kallfass I. , Zwick T. , Freude W. , Randel S. , Kippenberg T. J. , Koos C.
Published: July 2023

We demonstrate single-soliton Kerr-comb generators, exploiting photonic wire bonds to connect Si3N4 resonators and self-injection-locked InP pump lasers. The assembly is used to generate a 0.302 THz carrier for 160 Gbit/s wireless transmission over 55 m.
Gigahertz Dual-Comb Modelocked Laser: High Power and High Coherence in Free-Running Operation
Authors: Phillips Christopher R. , Willenberg Benjamin , Nussbaum-Lapping Alexander , Callegari Fabio , Camenzind Sandro L. , Pupeikis Justinas , Keller Ursula
Published: July 2023

We demonstrate a single-cavity dual-comb laser combining 1-GHz repetition rate, 3-W average power, and 78-fs pulses via an intracavity biprism. The laser’s low noise properties enable a fully coherent dual-comb spectroscopy measurement on acetylene.
Dual-Comb Asynchronous Electro-Optic Sampling Technique for High-speed Optoelectronic Devices
Authors: Barot Dipen , Feldman Ari D. , Washburn Brian R.
Published: July 2023

A dual-comb asynchronous electro-optic sampling (DC-AEOS) system is built for characterizing the response of high-speed optoelectronic devices. Utilizing DC-AEOS, a 40 GHz photodiode is characterized with short acquisition time, and high signal-to-noise ratio.
100 GHz Amplified Mode-locked Frequency Comb with 80 Gbaud NRZ Transmission Ability Based on Ultra-fast Quantum Dot Technology
Authors: Cao Victoria , Pan Shujie , Wu Dingyi , Liu Huiyun , Xiao Xi , Chen Siming
Published: July 2023

We demonstrate a 100 GHz repetition rate mode-locked based OFC source and a high gain SOA based on ultra-fast QD dynamics. High-speed optical NRZ data transmission of >80G baud is achieved with the amplified comb.
Integrated Plasmonics
Authors: Leuthold Juerg
Published: July 2023

Plasmonic is an alternative to photonics. It’s effects are increasingly employed to build ultrafast devices. In this tutorial talk we will review progress on modulators, detectors and sensors with bandwidths in excess of 500 GHz.
Engineered Raman-Kerr Microcomb in integrated chalcogenide microresonators
Authors: Luo Liyang , Xia Di , Wang Zifu , Zhao Xin , Li Yufei , Li Zhaohui , Zhang Bin
Published: July 2023

We first propose and experimentally demonstrate the engineered Raman-Kerr microcomb by adjusting the gains between Raman and Kerr effects in an integrated chalcogenide microresonator, leading to controllable approaches for optical frequency synthesizers.
InAs based Nonlinear Dielectric Metasurface for Binary Phase Terahertz Generation
Authors: Jung Hyunseung , Hale Lucy L , Gennaro Sylvain D. , Briscoe Jayson , Iyer Prasad P. , Doiron Chloe F. , Harris C. Thomas , Luk Ting Shan , Addamane Sadhvikas J , Reno John L , Brener Igal , Mitrofanov Oleg
Published: July 2023

We demonstrate an InAs-based nonlinear dielectric metasurface, which can generate terahertz (THz) pulses with opposite phase in comparison to an unpatterned InAs layer. It enables binary phase THz metasurfaces for generation and focusing of THz pulses.
Terahertz Photoconductive Metasurface Detector with enhanced Two-Step Photon Absorption at 1550 nm
Authors: Jung Hyunseung , Hale Lucy L , Briscoe Jayson , Sarma Raktim , Luk Ting Shan , Addamane Sadhvikas J , Reno John L , Brener Igal , Mitrofanov Oleg
Published: July 2023

We demonstrate the use of low-temperature grown GaAs (LT-GaAs) metasurface as an ultrafast photoconductive switching element gated with 1550 nm laser pulses. The metasurface is designed to enhance a weak two-step photon absorption at 1550 nm, enabling THz pulse detection.
Femtosecond Ablation of Monolayer Hexagonal Boron Nitride
Authors: Ahmad Sabeeh Irfan , Sarpong Emmanuel , Dave Arpit , Luo Chih-Wei , Chang Wen-Hao , Her Tsing-Hua
Published: July 2023

We report the first experiment on single-shot femtosecond laser ablation of monolayer hexagonal boron nitride (hBN). The observed intrinsic ablation threshold fluence is nearly 660 mJ/cm2, which is at least 10× higher than all other two-dimensional materials. Our work indicates the feasibility of hBN for femtosecond laser patterning.
Atmosphere-Driven Surface Chemical Reactions on Femtosecond Laser Processed Silver
Authors: Kaufman Graham , Nejati Siamak , Zuhlke Craig
Published: July 2023

The contact angle and surface chemistry of femtosecond laser processed silver evolves at an accelerated rate compared to other metals. The transient state of the surface chemistry after laser processing is analyzed with electron spectroscopy.
1060nm Single-mode Intra-cavity Metal-aperture VCSEL for over 2km Standard 1300nm SMF Transmission
Authors: Ge Chang , Dong Liang , Gu Xiaodong , Koyama Fumio
Published: July 2023

We present 1060nm single-mode metal-aperture VCSEL for 1300nm-standard single-mode fiber transmission. The small-signal modulation bandwidth is 29GHz. We demonstrate 65Gbps(NRZ) and 90Gbps(PAM4) transmissions through 2km SMF. The bandwidth and distance product is 250Gbps•km.
Hybrid SESAM Mode-Locked VECSEL
Authors: Tsaoussis Simon P. , Gibson Ricky , Rollag Joshua , Nguyen Catherine , Follman David , Cole Garrett , Addamane Sadhvikas , Moloney Jerome V. , Jones R. Jason
Published: July 2023

A mode-locked VECSEL employing a novel hybrid semiconductor saturable absorber/dielectric output coupler is reported. The linear cavity laser emits 410 femtosecond pulses at a repetition rate of 4.2 GHz operating at λ ≈ 1030 nm.
Compact, single-shot and complete Mueller matrix imaging using metasurfaces
Authors: Zaidi Aun , Rubin Noah A. , Meretska Maryna L. , Li Lisa , Dorrah Ahmed H. , Park Joon-Suh , Capasso Federico
Published: July 2023

Mueller matrix imaging, an important technique in STEM, images the information-rich spatially varying polarization properties of an object. Using nanoengi-neered metasurfaces, we implement a compact Mueller imaging system that can, in a single-shot, acquire images for all sixteen Mueller matrix components.
ASE Noise Source-based BPSK Terrestrial Free-space Optical LPI Communication with Adaptive Optics
Authors: Nafria Vijay , Djordjevic Ivan B.
Published: July 2023

In this paper we are presenting results from our one-mile-long free-space optical LPI communication link at University of Arizona for an ASE noise source based 5 Gb/s BPSK signal. We are reporting improvements in the BERs from using the adaptive optics to compensate for wavefront distortions in medium atmospheric turbulence.
Experimental Demonstration of Bubble-induced Turbulence Compensation Employing NHS-PWC in PolMux-UOWC
Authors: Deng Bohua , Wang Jiwei , Wang Zhaoming , Wei Zixian , Chen Chen , Fu H. Y.
Published: July 2023

We propose a non-Hermitian symmetric pairwise coding scheme to compensate for the impairments of bubble-induced turbulence in underwater optical wireless communication, and experimentally demonstrate an 8.58 Gbps system combined with polarization multiplexing.
Low-loss, fine resolution wavelength-selective switch realized at a silicon photonics foundry
Authors: Wankhade Vivek V. , Fatema Saleha , Cohen Lucas M. , Lingaraju Navin B. , Zhang Bohan , Onural Deniz , Popović Miloš , Weiner Andrew M.
Published: July 2023

We report a demonstration of a 3-channel wavelength-selective switch with individual channel bandwidths of 2 GHz and drop port loss below 1 dB, paving the way for efficient spectrum utilization in quantum networking applications.
Wide-angle optical beam steering using phase-change materials for tunable gratings
Authors: Wang Mengyun , Aggarwal Samarth , Lee June Sang , Dong Bowei , Farmakidis Nikolaos , Yang Guoce , Bhaskaran Harish
Published: July 2023

By incorporating the ultralow-loss phase-change materials (PCMs) into wavelength-agile gratings, the change in the refractive index due to the crystalline phase-state change of PCMs facilitates the expansion of the field-of-view (FOV) of optical beam steering (OBS), achieving a large scanning range over 64°.
Parallel Random LiDAR
Authors: Kim Kyungduk , Eliezer Yaniv , Spitz Olivier , Cao Hui
Published: July 2023

We realize parallel LiDAR using a highly multimode laser. Spatio-temporal beating of lasing modes generates multiple probe beams with distinct intensity fluctuations in time, enabling simultaneous ranging of targets. The robustness to interference is shown.
Engineering Design of Integrated III-V/SiN Quantum-well and Quantum-dot Lasers
Authors: Alkhazraji Emad , Chow Weng W. , Grillot Frederic , Bowers John E. , Madaras Scott E. , Gehl Michael , Skogen Erik , Wan Yating
Published: July 2023

Spectrally-pure lasers are paramount in various fields. Progression to Hz-level lasing linewidth in III-V/SiN lasers with quantum-dot active regions is predicted here. Using parametric studies, one can produce timely results in engineering designs.
35W Carrier-Envelope-Phase-Stable Few-Cycle Mid-Infrared OPCPA at 10 kHz
Authors: Seeger Maximilian F. , Kammerer Dominik , Blöchl Johannes , Nubbemeyer Thomas , Kling Matthias F.
Published: July 2023

We demonstrate a carrier-envelope-phase-stable mid-infrared optical parametric amplifier, delivering 20fs pulses at 3.5 mJ energy. Its excellent stability and high repetition rate make it an outstanding frontend for high flux, soft x-ray attosecond spectroscopy.
Structured light analogy of quantum squeezed states
Authors: Wang Zhaoyang , Zhan Ziyu , Vetlugin Anton N. , Ou Jun-Yu , Liu Qiang , Shen Yijie , Fu Xing
Published: July 2023

We demonstrate novel structured light as an analogy of quantum squeezed states, transferring quantum squeezing concepts to characterize optical spatial modes, providing flexible control of deep-subwavelength features breaking the spatial diffraction limit over ~λ/1000.
Kerr Comb Generation in Normal-dispersion, Bi-directionally Coupled Microresonators
Authors: Zang Jizhao , Yu Su-Peng , Carlson David R. , Briles Travis C. , Jin Yan , Papp Scott B.
Published: July 2023

We design bi-directionally coupled microresonators to lift the degeneracy of counter-propagating modes and control nonlinear dynamics in the normal-dispersion regime. We demonstrate controllable mode-splitting and Kerr-comb generation without any nanoscale patterns.
Integrated High-Extinction-Ratio 2.0-Meter Unbalanced MZI for Laser Frequency Noise Measurements
Authors: Liu Kaikai , Wang Jiawei , Isichenko Andrei , Chauhan Nitesh , Blumenthal Daniel J.
Published: July 2023

We report a 2.0-meter-long ultra-low loss Si3N4 waveguide unbalanced MZI with a 96.6 MHz FSR and 37.5 dB extinction ratio. We demonstrate self-delayed homodyne laser frequency noise measurement.
µ-Transfer printing of GaSb-based gain elements for integrated external cavity lasers at 2 µm range
Authors: Tuorila Heidi , Viheriälä Jukka , Arafat Yeasir , Koivusalo Eero , Hilska Joonas , Atar Fatih Bilge , Gunning Fatima , Corbett Brian , Guina Mircea
Published: July 2023

Micro transfer printing of GaSb-based gain elements transferred to silicon photonics platform is reported for the first time. Using a distributed Bragg reflector fabricated utilizing silicon-on-insulator technology and the GaSb integrated gain chip, a single frequency external cavity laser emitting at around 1.96 µm is demonstrated.
All-optical digital processing in Carbon Disulfide liquid-core optical fiber
Authors: Perron Nicolas , Chemnitz Mario , Fischer Bennet , Junaid Saher , Schmidt Markus , Morandotti Roberto
Published: July 2023

We implement ultrafast, power-efficient, all-optical logic gates based on a liquid-core optical fiber platform. We present, theoretically and experimentally, the unique nonlinear interactions driving each logic operation, implemented using only standard telecom components.
Simultaneous Multi-Function Integrated RF Photonic Front-End
Authors: Ye Kaixuan , Daulay Okky , Liu Gaojian , Marpaung David
Published: July 2023

We experimentally demonstrate the first ever integrated RF photonic front-end capable of simultaneous tunable filtering and phase shifting. We achieve, at the same time, >50 dB notch filtering tunable from 3.9 to 8.1 GHz and tunable 2π phase shift from 12 to 20 GHz, with an optimized noise figure of 24 dB and a spurious-free dynamic range of 105 dB · Hz 2
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Reconfigurable RF Frequency Sniffer Using Tunable Micro Ring Resonator
Authors: Singh Karanveer , Das Ranjan , Misra Arijit , De Souvaraj , Hosni Mohamed I. , Venugopalan Abhinand , Zhou Linjie , Schneider Thomas
Published: July 2023

A power-efficient, silicon photonic-based sniffer chip with tunable cascaded ring resonators is used for real-time spectrum sensing of millimeter-wave carrier signals, enabling reconfigurable temporal discrimination using peak group delay and frequency-to-time mapping.
Real-Time Blind Source Separation with Integrated Photonics for Wireless Signals
Authors: de Lima Thomas Ferreira , Lederman Joshua C. , Zhang Weipeng , Hu Junqiang , Blow Eric C. , Asahi Koji , Aono Yoshiaki , Wang Ting , Prucnal Paul R.
Published: July 2023

We demonstrate, for the first time, real-time blind source separation of interfering GHz transmitters using photonic weights controlled by an RF-System-on-Chip FPGA. This analog system achieves multi-antenna signal separation with millisecond execution latency.
Monolithic electronics in Silicon Photonics for time-multiplexed sensing and control
Authors: Zanetto F. , Toso F. , Grimaldi V. , Martinez A. , Morichetti F. , Melloni A. , Ferrari G. , Sampietro M.
Published: July 2023

We report on the monolithic cointegration of CMOS electronics in a commercial Silicon Photonics technology and show how this approach enables time-multiplexed feedback control of large-scale optical circuits using a limited number of electrical signals.
High-definition microprint of metal-nanoparticles by optical vortex induced forward transfer
Authors: Kawaguchi Haruki , Takahashi Kanta , Wei Rong , Yamane Keisaku , Morita Ryuji , Yuyama Ken-ichi , Kawano Satoyuki , Miyamoto Katsuhiko , Aoki Nobuyuki , Omatsu Takashige
Published: July 2023

We present the first demonstration of 2-dimensional direct-microprint of ultrafine circle metallic dots, consisting of close-packed gold nanoparticles, with ultrahigh definition by employing optical vortex induced forward transfer.
Efficient Broadband Mid-Infrared Optical Parametric Amplification in Nanophotonic Waveguides
Authors: Hamrouni M. , Jankowski M. , Hwang A. , Jornod N. , Mishra J. , Stokowski H. S. , McKenna T. P. , Langrock C. , Südmeyer T. , Safavi-Naeini A. H. , Fejer M. M.
Published: July 2023

We demonstrate efficient optical parametric amplification in dispersion-engineered thin-film-lithium-niobate nanowaveguides. These devices exhibit parametric gains >30 dB/√pJ, enabling down-conversion of sub-10-pJ pump pulses to coherent 1.35-pJ idler pulses with a 140-nm-wide spectrum centered around 3200 nm.
High-efficiency tunable Raman lasers in compact multimode silicon racetrack resonators
Authors: Zhong Keyi , Zhang Yaojing , Tsang Hon Ki
Published: July 2023

We demonstrated a widely tunable silicon Raman laser with threshold of 0.2 mW and slope-efficiency of 27.5%. The adiabatic Euler bends maintained average loaded Q > 2.2 × 106 throughout the 157 nm tuning range.
Microfabricated Strontium Vapor Cells for Compact Optical Frequency References
Authors: Hummon Matthew , Li Yang , Porter Samuel , Kitching John
Published: July 2023

We demonstrate FM laser spectroscopy at 461 nm using a microfabricated strontium vapor cell. These compact and manufacturable vapor cells may accelerate the development of quantum devices based on alkaline earth atoms.
Universality of open microcavities for strong light-matter coupling
Authors: Król M. , Łempicka-Mirek K. , Rechcińska K. , Furman M. , Nogajewski K. , Mazur R. , Morawiak P. , Piecek W. , Pacuski W. , Szczytko J. , Piętka B.
Published: July 2023

An optical resonator is utilized to enhance interactions between photons and solid-state emitters. In particular, when the coupling strength between the exciton within the material is faster than the dissipation rate, the eigenstates of the system are mixed light-matter quasiparticles referred to as exciton-polaritons. In this work, we demonstrate an open, planar cavity platform for investigating a strong coupling regime. The open cavity approach supports ease of integration of diverse material systems and in situ tunability of the photonic resonance. We characterize the strong coupling regime in systems ranging from thin 2D semiconductors, perovskites, and II-VI semiconductor quantum wells.
Tunable plasmonic tweezers based on nanocavity structure for multi-site trapping
Authors: Yan Xiaoya , Shi Hongyan , JIA PENGXUE , Sun Xiudong
Published: July 2023

The ability of plasmonic optical tweezers (POT) based on metal nanostructure to stably trap and dynamically manipulate nanoscale objects at low laser power has been widely used in nanotechnology and life sciences fields. In particular, the plasmonic nanocavity structure can improve the local field intensity and trap depth by confining electromagnetic fields to subwavelength volumes. In this paper, the optical force and potential well exerted on the nanoscale polystyrene (PS) particles (RNP≤50 nm) dependent on the geometric size of the nanocavity is theoretically investigated. It is revealed that the trapping performance can be flexibly adjusted by changing the structural parameters of the optical cavity unit (OCU), and it can provide a stable potential well for PS particles of RNP=14 nm when the cavity depth is 140 nm. In addition, the trapping properties of the hexagonal nanocavity array (HNCA) structures are also investigated and it is found that multiple trapping sites can be activated simultaneously in the laser irradiation area. This multi-site stable trapping platform composed of HCNA structures makes it possible to analyze multiple target particles contemporaneously.
Using whole blood cultures in interferon gamma release assays to detect Mycobacterium tuberculosis complex infection in Asian elephants (Elephas maximus)
Authors: Pongma Chitsuda , Songthammanuphap Songkiat , Puthong Songchan , Buakeaw Anumart , Prammananan Therdsak , Warit Saradee , Tipkantha Wanlaya , Kaewkhunjob Erngsiri , Jairak Waleemas , Kongmakee Piyaporn , Pabutta Choenkwan , Sripiboon Supaphen , Yindeeyoungyeon Wandee , Palaga Tanapat
Published: July 2023

Elephants are susceptible to Mycobacterium tuberculosis (M. tb) complex (MTBC) infections. Diagnosis of tuberculosis (TB) in elephants is difficult, and most approaches used for human TB diagnosis are not applicable. An interferon gamma release assay (IGRA) to diagnose TB in Asian elephants (Elephas maximus) using peripheral blood mononuclear cells (PBMCs) has been previously developed. Although the assay is shown to be valid in determining MTBC infection status, the laborious PBMC isolation process makes it difficult to use. In this study, we simplified the method by using whole blood cultures (WC) as the starting material. Using PBMC cultures for IGRA, the MTBC infection status of 15 elephants was first confirmed. Among these animals, one has been previously confirmed for M. tb infection by both TB culture and PCR and the other was confirmed for MTBC infection in this study by droplet digital PCR (ddPCR) method. WC for IGRA consisted of an unstimulated sample, a mitogen stimulated sample, and sample stimulated with recombinant M. tb antigens, ESAT6 and CFP10. Using WC for IGRA in the 15 enrolled elephants, the results showed that 7 out of 15 samples yielded MTBC infection positive status that were completely concordant with those from the results using PBMCs. To test this method, WC for IGRA were applied in another elephant cohort of 9 elephants. The results from this cohort revealed a perfect match between the results from PBMC and WC. Responses to ESAT6 or CFP10 by PBMC and WC were not completely concordant, arguing for the use of at least two M. tb antigens for stimulation. Given the ease of sample handling, smaller blood sample volumes and equivalent efficacy relative to the PBMC approach, using WC for IGRA provides a novel, rapid, and user-friendly TB diagnostic method for determining the MTBC infection in elephants.
Analytical performance of the digital morphology analyzer Sysmex DI-60 for body fluid cell differential counts
Authors: Yoon Sumi , Kim Hye Ryoun
Published: July 2023

Background

Sysmex DI-60 (Sysmex, Kobe, Japan) is a digital morphology (DM) analyzer widely used in clinical laboratories and supports body fluid (BF) applications. We evaluated analytical performance of DI-60 compared with XN-350 (Sysmex) and manual counting for BF cell differential counts.

Methods

A total of 213 BF samples were collected (47 cerebrospinal fluid [CSF], 80 pleural fluid, and 86 ascites samples). The analytical performance of DI-60 for BF cell differential counts was evaluated based on sensitivity, specificity, accuracy, and agreement. BF cell differential counts obtained by DI-60 were compared with those obtained by XN-350 and manual counting.

Results

The overall sensitivity was high for neutrophils, lymphocytes, and macrophages (range, 83.1–99.4%). The overall specificity and overall accuracy were high for all cell types (range, 95.3–99.7% and 94.3–99.3%, respectively). The agreement between DI-60 pre-classification and verification was strong (κ = 0.89). The absolute mean differences between DI-60 verification and XN-350 ranged from 0.26 to 11.05, and differences between DI-60 verification and manual counting ranged from 0.01 to 4.76.

Conclusions

This is the first study to evaluate the performance of DI-60 compared with XN-350 and manual counting for BF cell differential counts. DI-60 showed reliable performance with CSF, pleural fluid, and ascites samples. For BF cell differential counts, DI-60 may be a better option than XN-350 and could be used for screening purposes in understaffed laboratories. To improve the hematology workflow for BF cell differential counting, the DM analyzer needs to be optimized by taking into account the laboratory situation and unmet needs, and the clinical laboratory needs to establish criteria for verification and manual slide review.
The challenges of managing patients with cancer in the workplace: Needs, opportunities and perspectives of occupational physicians
Authors: Rondinone Bruna Maria , Fontana Luca , Buresti Giuliana , Fedele Mauro , Fortuna Grazia , Iavicoli Sergio , Lecce Maria Giuseppina , Persechino Benedetta
Published: July 2023

Cancer is a global major public health problem since it is a leading cause of death, accounting for nearly 10 million deaths in 2020 worldwide and the most recent epidemiological data suggested that its global impact is growing significantly. In this context, cancer survivors have to live for a long time often in a condition of disability due to the long-term consequences, both physical and psychological. These difficulties can seriously impair their working ability, limiting the employability. In this context, the occupational physician plays a key role in the implementation and enforcement of measures to support the workers affected by cancer, to address issues such as the information on health promotion, the analysis of work capacity and the management of disability at work and also promoting a timely and effective return to work and preserving their employability. Therefore, the aim of this study was to gather useful information to support the occupational physicians in the management of workers affected by cancer, through a survey on 157 Italian occupational physicians. Based on the interviewees’ opinions, the most useful occupational safety and health professionals in terms of job retention and preservation of workers affected by cancer are the employers and the occupational physicians themselves, whose role is crucial in identifying and applying the most effective reasonable accommodations that should be provided to the workers affected by cancer. The provision of these accommodations take place on the occasion of mandatory health surveillance medical examination to which the worker affected by cancer is subjected when he returns to work. Results on training and information needs showed that the management of the workers affected by cancer is essentially centered on an appropriate fitness for work judgment and on the correct performance of health surveillance. However, an effective and successful management model should be based on a multidisciplinary and integrated approach that, from the earliest stages of the disease, involves the occupational physicians and employers.