bluuebunny/crossref_metadata_2025 huggingface dataset:
Spectral Narrowing of Cr:ZnS/Se Lasers Oscillation In Twisted Mode Cavity
Authors: Danilin Rem , Fedorov Vladimir , Martyshkin Dmitry , Mirov Sergey
Published: July 2023

It was demonstrated that suppression of the spatial hole burning effect via "mode twisting" in nonselective cavities results in linewidth narrowing to ~80-90 pm from ~20-50 nm for lasers based on polycrystalline Cr:ZnS and Cr:ZnSe.
Spectroscopy and 2.8 µm Laser Operation of Disordered Er3+:CLNGG Crystals
Authors: Normani Simone , Loiko Pavel , Pan Zhongben , Dunina Elena , Fomicheva Liudmila , Kornienko Alexey , Braud Alain , Chen Weidong , Griebner Uwe , Petrov Valentin , Camy Patrice
Published: July 2023

We report on spectroscopy and laser operation on the 4I11/2→4I13/2 transition of erbium-doped disordered CLNGG crystals with broadband emission properties. A 41.4 at.% Er:CLNGG laser generated 292 mW at 2.80 µm with 22.6% slope efficiency.
High-efficiency Mid-Infrared InGaAs/InP Arrayed Waveguide Gratings
Authors: Karnik Tushar Sanjay , Dao Khoi Phuong , Du Qingyang , Diehl Laurent , Pflüegl Christian , Vakshoori Daryoosh , Hu Juejun
Published: July 2023

We report the fabrication of InGaAs/InP based arrayed waveguide gratings featuring low insertion loss and non-uniformity. This device can be integrated monolithically with on-chip III-V lasers to make compact high-power mid-infrared sources.
Self-aligning Mach-Zehnder Interferometer based filter for intra-cavity tuning of InP integrated lasers
Authors: Tondini S. , Hazan J. , Kabir T. , Heck M. J. R.
Published: July 2023

We demonstrate an automated routine steering an InP tunable filter over its free spectral range of 10nm. The routine is tested on a 8-arm Mach-Zehnder Interferometer, but can be conveniently extended to different tunable devices.
Observation of the Burstein-Moss Effect in GaAs Wafers via Few-Cycle Transient Dispersion Measurement
Authors: Zhou Rui , Jani Hemang , Duan Lingze
Published: July 2023

We report time-resolved measurements of transient dispersion in GaAs wafers using few-cycle pump-probe reflectometry. Comparisons among samples show good agreement with the Burstein-Moss effect model.
Studying Terahertz Conical Emission by a Two-color Laser-based Air Plasma
Authors: Stathopulos A. , Rasmussen M. , Nagy O. , Skupin S. , Bergé L. , Jepsen P. U. , Zhou B.
Published: July 2023

We characterize the frequency-resolved terahertz (THz) beam profile created by two-color air-plasmas in the broadband frequency range (1-15 THz). Far-field conical emission patterns are confronted with current models proposed in the literature.
High-Bandwidth Fourier-Transform Spectrometer Monolithically Integrated on Thin Film Lithium Niobate
Authors: Finco Giovanni , Li Gaoyuan , Maeder Andreas , Pohl David , Kaufmann Fabian , Grange Rachel
Published: July 2023

We present a stationary-wave Fourier-transform spectrometer monolithically integrated on lithium niobate-on-insulator photonic circuits, with a resolution of 2.53 nm and an optical bandwidth limited solely by the waveguide single-mode condition.
Modelocked InGaSb-MIXSEL at 2.04 µm
Authors: Gaulke Marco , Heidrich Jonas , Huwyler Nicolas , Schuchter Maximilian , Golling Matthias , Barh Ajanta , Keller Ursula
Published: July 2023

We present the first modelocked, backside-cooled InGaSb-MIXSEL operating at 2035 nm, producing fundamentally modelocked pulses of 1.5 ps with average output power up to 27 mW at 3.9 GHz repetition rate.
An Investigation of a Colloidal Quantum Dot Based Color Conversion Layer with Fine Pixel and High Efficiency
Authors: Chao Han-Yu , Lee Guan-Ying , Kuo Hao-Chung , Lin Chien-Chung
Published: July 2023

We demonstrated a semiconductor process based procedure to fabricate a high resolution colloidal quantum dot array. The color conversion efficiency can be as high as 17.9% and further enhanced 1.64 times by an additional DBR mirror. The vacuum storage time is projected to be 3523 hours.
Photonic Indistinguishability of the Tin-Vacancy Center in Diamond
Authors: Arjona Jesús , Parker Ryan , Chen Kevin , Purser Carola , Li Linsen , Michaels Cathryn , Stramma Alexander , Debroux Romain , Harris Isaac , Hayhurst Martin , Nichols Eleanor , Trusheim Matthew , Gangloff Dorian , Englund Dirk , Atature Mete
Published: July 2023

Tin-vacancy centres in diamond are spin-photon interfaces with intrinsic environmental noise insensitivity. We reveal their high optical coherence in a nanostructured environment and generate single photons with a 99.7% purity and an indistinguishability of 63(9)%. [1]
Radiation tolerant fiber comb for space applications
Authors: Lezius Matthias , Böle Frederik , Penka Daniela , Melin Gilles , Robin Thierry , Cadier Benoit , Holzwarth Ronald
Published: July 2023

A radiation tolerant Erbium doped fiber comb has been demonstrated. Signals of the comb's fundamental frequencies did not degrade after Gamma radiation with an accumulated dose of 1 kGy, comparable to a decade of operation in a Mid-Earth Orbit.
Generation and characterization of CEP controllable, sub-cycle optical vortex pulses
Authors: Lin Yu-Chieh , Midorikawa Katsumi , Nabekawa Yasuo
Published: July 2023

We introduce the generation and pulse characterization of carrier-envelope-phase controllable, sub-cycle optical vortex pulses in the short-wave infrared regime.
Nanophotonic metasurfaces with expanded eye boxes for augmented reality
Authors: Boo Hyunpil , Yang Hangbo , Wong Chee Wei
Published: July 2023

Through careful engineering of the incoming beam, we can position the eyebox at different coordinates and expand the eyebox of our nanophotonic metasurfaces. This method overcomes the critical limitation of Maxwellian view augmented reality displays.
Phase Noise Characteristics of Supercontinnum Source based on 50-GHz Electro-optic Optical Frequency Comb Using Modified Self-heterodyne Method
Authors: Song Minje , Lim Seungyoung , Choi Hyunjong , Lee Taehyun , Choi Gyudong , Jung Youngjin , Ahn Joon Tae , Song Minhyup
Published: July 2023

We generated a supercontinuum source based on a 50-GHz electro-optic optical frequency comb. Furthermore, we investigated the phase noise characteristics to evaluate the frequency stability of EO-OFC-based supercontinuum using the proposed modified self-heterodyne method.
10-kW-level Yb-Raman fiber laser based on adjustable Raman threshold method
Authors: Qi Tiancheng , Li Dan , Yan Ping , Gong Mali , Xiao Qirong
Published: July 2023

By adjusting Raman threshold method according to pump power, the residual pump and high-order Raman scattering are suppressed. A 10.7 kW Yb-Raman fiber laser operating at 1120 nm is achieved for the first time.
Low-voltage Dynamic Light Manipulation with Slot Silicon-organic Metasurfaces
Authors: Gu Yiran , Zheng Tianzhe , Kwon Hyounghan , Ballew Conner , Roberts Gregory , Faraon Andrei
Published: July 2023

Fast-tunable metasurfaces would provide reconfigurable optical wavefronts. We show the integration of slot resonance metasurfaces with electro-optic polymers that will enable large and fast modulation under low voltages.
Single-mode Integrated Out-of-plane Meta Beam Shaper for Optogenetics Neurostimulation
Authors: Iyer Hrishikesh T , Vlasov Yurii
Published: July 2023

We designed and experimentally demonstrated a single-mode out-of-plane beam shaper that merges functionalities of a grating and a metasurface within a 240nm silicon nitride layer that focuses 473nm light into a nearly diffraction-limited spot.
Constructing a magneto-optical trap using transmissive metasurfaces
Authors: Zhu Wenqi , Chen Lu , Song Junyeob , Yang Jinghui , Koksal Okan , Wang Zi , Ferdinand Andrew , Jammi Sindhu , Spektor Grisha , Papp Scott B. , Agrawal Amit
Published: July 2023

We use metasurfaces to construct a six-beam magneto optical trap for neutral strontium atoms. The configuration consists of a polarization-multiplexed metasurface splitter and three topology-optimized metagratings, requiring only two input beams and no bulk optics.
Low-temperature and hydrogen-free silicon dioxide cladding for integrated photonics
Authors: Qiu Zheru , Li Zihan , Wang Rui Ning , Kippenberg Tobias J.
Published: July 2023

We demonstrate a hydrogen-free low-loss silicon oxide film deposited with SiCl4 and O2 precursor. A very wide low-loss window of 1300 nm to 1620 nm is achieved at deposition temperature as low as 300°C.
Power cooling and low-temperature spectroscopy of ytterbium doped silica
Authors: Topper Brian , Kuhn Stefan , Neumann Alexander , Albrecht Alexander R. , Flores Angel S. , Häßner Denny , Hein Sigrun , Hupel Christian , Nold Johannes , Haarlammert Nicoletta , Schreiber Thomas , Sheik-Bahae Mansoor , Mafi Arash
Published: July 2023

We laser cooled ytterbium doped silica to 255 K. Temperature-dependent spectroscopy measurements reveal cooling to 150 K is possible. We also report the observation of site-selective excitation in Yb, Al co-doped silica.
Design of MPLC approach for high coupling efficiency OAM mode into ring-core optical fibers
Authors: Adibifard Ghazaleh , Rusch Leslie A.
Published: July 2023

Multiplane light converters (MPLC) for orbital angular momentum (OAM) modes previously targeted ideal free space modes. We design for coupling into a ring core fiber (RCF), contrast efficiency with general designs, and examine different implementations.
Correlative Conjugated Detection Scheme for Laser-Phase-Noise-Tolerant Coherent Detection
Authors: Sakamoto Takahide
Published: July 2023

We propose a correlative conjugated detection for laser-phase-noise-tolerant coherent detection. Carrier phase is recovered from the spectral correlation taken from phase-conjugated twin signals. Numerically demonstrated is successful demodulation of QPSK signals having significant phase noise.
Demonstration of IQ-channel Multiplexed Coherent DP-4ASK Signal with Reduced DAC Power Consumption for Downlink Transmission with Access-span Length Difference
Authors: Shimada Keiji , Inagaki Mizuki , Eguchi Shota , Matsumoto Ryosuke , Kodama Takahiro
Published: July 2023

In coherent PON downlink transmission with 10-km access-span length difference between two ONUs, the adaptive IQ-imbalanced DP-4ASK signal can save the 22 % power consumption of the Q channel of DAC for IQ-balanced DP-4ASK signal.
Integrated DBR-based Pockels Laser
Authors: Xue Shixin , Li Mingxiao , Chang Lin , Ling Jingwei , Gao Zhengdong , Hu Qili , Zhang Kaibo , Xiang Chao , Wang Heming , Bowers John E. , Lin Qiang
Published: July 2023

We demonstrate an integrated DBR-based external cavity laser with linear laser frequency detuning capability based on the Pockels electro-optic effect, with a wide tuning range up to 8 GHz.
Towards a Strontium Optical Clock System with Metasurface Optics and Integrated Nonlinear Photonics
Authors: Ferdinand Andrew R. , Carlson David R. , Newman Zachary L. , Jammi Sindhu , Zhu Wenqi , Luo Zheng , Lunden Will , Patel Parth , Sheredy Dan , Spektor Grisha , Hickstein Daniel D. , Briles Travis , Boyd Martin M. , Agrawal Amit , Papp Scott B.
Published: July 2023

We report on a strontium optical clock built with integrated photonics. We implement free-space laser beam control of positioning, pointing, shaping, polarization, and integration with metasurface optics, and laser-frequency absolute stabilization with waveguide supercontinuum generators.
Compact and Robust Laser Stabilization System Using a Vibration-Insensitive All-Fiber Ring-Resonator
Authors: Jeon Igju , Ahn Changmin , Kim Chankyu , Park Seongmin , Jeon Wonju , Kim Jungwon
Published: July 2023

We stabilize a 1550-nm laser to a vibration-insensitive optical fiber delay with 10-10-level vibration sensitivity using a fiber ring-resonator configuration. A minimal frequency instability of 2.8×10-14 at 0.03-s averaging time is achieved in non-vacuum environment.
Fiber-based Frequency Combs with Quantum-limited Linewidths
Authors: Hutter Sarah R. , Seer Ali , König Tilman , Herda Robert , Hertzsch Daniel , Kempf Hannes , Wilk Rafal , Leitenstorfer Alfred
Published: July 2023

Exploiting the interplay between cavity dispersion and pump power, we minimize the phase noise in mode-locked laser systems. Free-running femtosecond frequency combs with few-to sub-kHz linewidths over their entire ultrabroadband spectrum are demonstrated.
A Photonic Deep Neural Network Processor on a Single Chip with Optically Accelerated Training
Authors: Bandyopadhyay Saumil , Sludds Alexander , Krastanov Stefan , Hamerly Ryan , Harris Nicholas , Bunandar Darius , Streshinsky Matthew , Hochberg Michael , Englund Dirk
Published: July 2023

We report an end-to-end photonic deep neural network processor, fabricated in a commercial CMOS process, that integrates optical matrix algebra and nonlinear function units onto a single chip and implements all-optical DNN inference and training.
Evaluation of a compact butterfly-style photonic-electronic neural chip on complicated deep learning tasks
Authors: Feng Chenghao , Gu Jiaqi , Zhu Hanqing , Tang Rongxing , Pan David Z. , Chen Ray T.
Published: July 2023

We deploy a compact butterfly-style photonic-electronic neural chip on ResNet-20 and achieve > 85% measured accuracy on the CIFAR-10 dataset with only 3-bit weight programming resolutions, showing its practicality in implementing complicated deep learning tasks.
Visualizing Momentum Forbidden Dark Exciton in Layered Semiconductor
Authors: Chand Saroj B , Woods John M , Mejia Enrique , Taniguchi Takashi , Watanabe Kenji , Grosso Gabriele
Published: July 2023

Compressive strain in WS2 modifies the band alignment and enables intervalley exciton-phonon scattering, enhancing the formation of dark intervalley excitons. Dark exciton emission depends on local strain, and it can be used for strain sensing.
Singly-Resonant Mid-IR Optical Parametric Oscillator in Lithium Niobate Nanophotonics
Authors: Hwang Alexander Y. , Stokowski Hubert , Park Taewon , Jankowski Marc , McKenna Timothy P. , Mishra Jatadhari , Fejer Martin M. , Safavi-Naeini Amir H.
Published: July 2023

We demonstrate a singly-resonant optical parametric oscillator pumped near 1 µm that generates telecom signal light and mid-infrared idler light near 3 µm using thin-film lithium niobate-on-sapphire integrated photonics.
Mid-Wave Infrared Black Phosphorus Photodetector Enhanced by an Integrated Metasurface Grating
Authors: Lien Max R. , Wang Nan , Wu Jiangbin , Soibel Alexander , Gunapala Sarath D. , Wang Han , Povinelli Michelle L.
Published: July 2023

We designed, fabricated, and characterized mid-wave infrared black phosphorus photodetectors with integrated metal-insulator-metal metasurface gratings. We show that our metasurface grating increases responsivity by ~7 times at room temperature.
Chalcogenide Glasses Microresonators with Ultra-high Q-factor in Near- and Mid-infrared Regions
Authors: Suk Daewon , Ko Kiyoung , Kim Dohyeong , Wang Rongping , Chun Byung Jae , Ko Kwang-Hoon , Choi Duk-Yong , Lee Hansuek
Published: July 2023

We report the record on-chip quality(Q)-factor for diverse chalcogenide glasses, reaching the loss of optical fibers on near- and mid-infrared. The maximum Q-factor is 2.15×107 and 2.91×107 in 1.55 μm and 3.67 μm wavelength, respectively.
Enabling second harmonic generation in pseudo-Landau quantized graphene through sublattice polarization
Authors: Lu Kunze , Luo Manlin , Gao Weibo , Wang Qi Jie , Sun Hao , Nam Donguk
Published: July 2023

We enable second harmonic generation in pseudo-Landau quantized graphene that achieves strong strain-induced sublattice polarization. A strong temperature-dependent behavior of the observed second harmonic generation is attributed to resonant optical transitions between discrete pseudo-Landau levels.
Reconfigurable chiral phase change nanomaterials
Authors: Burrow Joshua A. , Alam Md Shah , Smith Evan M. , Yahiaoui Riad , Laing Ryan , Shah Piyush J. , Searles Thomas , Vangala Shivashankar , Hendrickson Joshua R. , Sarangan Andrew , Agha Imad
Published: July 2023

We realize intrinsically chiral phase change material nano-helices that achieves the critical goal of demonstrating high-speed temporal control of opto-chirality over 50,000 cycles in Ge2Sb2Te5.
Mid-Infrared Hyperspectral Microscopy with Broadband 1-GHz Dual-Comb Spectroscopy
Authors: Chang Peter , Hoghooghi Nazanin , Swartz Stephanie , Lesko Daniel , Ishrak Ragib , Egbert Scott , Biegert Jens , Reddy Rohith , Rieker Gregory , Diddams Scott
Published: July 2023

We utilize a 1-GHz mid-infrared dual comb spectrometer for high speed and broadband hyperspectral imaging. The system covers 1000 cm
−
1 at λ
c
= 3.4 µm with 13.47 kHz acquisition rate and 4 µm spatial resolution.
Ultra-high-resolution dual-comb spectrometer based on densified gain-switching optical frequency combs
Authors: Quevedo-Galán C. , Rosado A. , Pérez-Serrano A. , Tijero J.M.G. , Esquivias I.
Published: July 2023

We demonstrate a dual-comb interferometer based on two externally densified gain-switching optical frequency combs and show its potential for ultra-high-resolution spectroscopy.
Four-Wave-Mixing controlled by Self-Phase-Modulation of chirped pulses
Authors: Silva Cassia Corso , Mansuryan Tigran , Tonello Alessandro , Arosa-Lobato Yago , Stepanenko Yuriy , Couderc Vincent , Krupa Katarzyna
Published: July 2023

We experimentally demonstrate how a concatenation of standard and microstructure fiber segments permits to shift the Four-Wave-Mixing sidebands when changing the chirp of the input pulsed pump. The blue shifted sideband can span over 200nm.
Modelling Nonlinear Propagation of Periodic Waveforms in Optical Fibre with a Neural Network
Authors: Boscolo Sonia , Dudley John M. , Finot Christophe
Published: July 2023

We deploy a neural network to predict the spectro-temporal evolution of a periodic waveform upon nonlinear fibre propagation and demonstrate efficient probing of the input-parameter space for on-demand comb generation or significant spectral/temporal focusing occurrence.
Ge-implantation-enhanced defect-state absorption in C-band silicon waveguide photodiode monitors
Authors: Niu Yue , Poon Andrew W.
Published: July 2023

We demonstrate Ge-implantation-enhanced defect-state absorption in the C-band in a 225-μm-long silicon waveguide photodiode, with a responsivity of ~54.8 mA/W/mm and a 1 nA dark current upon -3 V bias after a 10-minute 350°C annealing.
Dual-Pump Pump-Probe Method for Characterizing Nonlinear Loss of Optical Waveguides
Authors: Girouard Peter , Galili Michael , Frandsen Lars H. , Oxenløwe Leif K.
Published: July 2023

We demonstrate a method to characterize the nonlinear loss of high index contrast waveguides as a function of wavelength using a dual-pump pump-probe setup. Loss characteristics of amorphous silicon waveguides are extracted.
Intermodal Brillouin Gain Spectra in Few Mode Optical Fibers
Authors: Vandborg Mads Holmark , Grüner-Nielsen Lars , Mathew Neethu Mariam , Rishøj Lars Søgaard , Jostmeier Thorben , Marx Benjamin , Rottwitt Karsten
Published: July 2023

We model the Brillouin gain spectra between optical and acoustic LP modes in a few mode graded index fiber. We find good agreement when comparing to measurements.
Broadband longwave-IR dual-comb spectroscopy at video rate with 240,000 comb-mode resolved data points
Authors: Vodopyanov Konstantin , Muraviev Andrey , Konnov Dmitrii , Mirov Mike , Smolski Viktor , Moskalev Igor , Mirov Sergey , Vasilyev Sergey
Published: July 2023

We report fast (0.1-12 s per spectrum) acquisition of molecular spectra using dual frequency-comb spectroscopy with a pair of broadband (6.6-11.4µm) combs produced via intra-pulse difference frequency generation using sub-three-cycle 2.4-µm pulses as a pump.
Broadband Infrared Emission from Single-Mode Silicon Waveguides
Authors: Tyndall Nathan F. , Pruessner Marcel W. , Stievater Todd. H.
Published: July 2023

We describe the first observation of electrically-pumped infrared emission in single-mode silicon waveguides. Recombination in a p-i-n diode generates broadband emission, which is sufficiently bright for photonic integrated circuit spectroscopy and sensing.
High-Yield Large-Scale Optical Phased Array with Flip-Chip CMOS ASIC
Authors: Xie Shengjie , Zheng Jiajiu , Yang Hao , Byrd Matthew J. , Moss Benjamin , Watts Michael R. , Poulton Christopher V.
Published: July 2023

We present >99% yield and consistent beam forming performance across ten optical phased array modules each with a 1024-element array, flip-chip assembled CMOS ASIC, and interfacing microcontroller, enabling robust performance in applications such as LiDAR.
AlGaAs soliton microcombs at room temperature
Authors: Wu Lue , Xie Weiqiang , Xiang Chao , Chang Lin , Yu Yan , Chen Hao-Jing , Yamamoto Yoshihisa , Bowers John E. , Vahala Kerry J. , Suh Myoung-Gyun
Published: July 2023

Soliton generation in AlGaAs microresonators at room temperation is reported for the first time. The destabilizing thermo-optic effect is shown to instead provide stability for high soliton repetition rates. The optical pump power is sub-milliWatt.
Visible to Mid-infrared Supercontinuum Generation in 4H-Silicon-Carbide Nanophotonic Waveguides
Authors: Deniel Lucas , Guidry Melissa A. , Lukin Daniil M. , Yang Ki Youl , Yang Joshua , Vučković Jelena , Hänsch Theodor W. , Picqué Nathalie
Published: July 2023

Dispersion-engineered silicon-carbide waveguides generate dispersive waves at visible and mid-infrared wavelengths as long as 4 µm. The energy of the seed 70-fs pulses centered at 1.5-µm can be as low as 200 pJ.
Towards spliced SMF to hollow core fiber connection with low loss and low back-reflection
Authors: Shi Bo , Zhang Cong , Numkam Fokoua Eric R. , Poletti Francesco , Richardson David J. , Slavík Radan
Published: July 2023

We propose a new solid-core to hollow-core fiber connection where an SMF is offset-spliced with an angle-cleaved graded index mode field adapter. We show through simulations and an initial experiment that this results in simultaneous low-loss and low backreflection.
Photonic Crystals with a Twist
Authors: Mazur Eric , Tang Haoning
Published: July 2023

Twisted bilayer photonic crystal slabs have two degrees of freedom, twist angle and interlayer spacing, that permit the engineering of nanoscale devices that exhibit novel behavior and open the door to real-time reconfigurable devices.
RF Stabilization of Vernier Dual-microcombs
Authors: O'Malley Nathan P. , Wu Kaiyi , Fatema Saleha , Wang Cong , Girardi Marcello , Alshaykh Mohammed S. , Ye Zhichao , Leaird Daniel E. , Qi Minghao , Torres-Company Victor , Weiner Andrew M.
Published: July 2023

Leveraging the Vernier dual-comb method, we self-reference a THz octave-spanning microcomb with fCEO ∼100 GHz - normally too high for typical detection equipment - and translate the stability of an RF reference to optical frequencies.
All-optical Interconnects: Diffractive Permutation Networks
Authors: Mengu Deniz , Zhao Yifan , Tabassum Anika , Jarrahi Mona , Ozcan Aydogan
Published: July 2023

We present diffractive optical networks trained using deep learning to realize an arbitrary permutation operation with hundreds of thousands of connections. Addressing practical design challenges, we experimentally demonstrate a 625-interconnection system at terahertz spectrum.
Ultrafast laser writing in different grades of silica glass
Authors: Lei Yuhao , Wang Huijun , Skuja Linards , Kühn Bodo , Franz Bernhard , Svirko Yuri , Kazansky Peter G.
Published: July 2023

The dependence of ultrafast laser induced modifications in silica glass on the method of its manufacturing is observed. Direct writing of geometric phase elements and 5D optical storage with nanopore structures require different silica grades.
Ultrafast Sources at On-Demand Wavelengths via Seeded Intermodal Raman Scattering
Authors: Kabagöz Havva Begüm , Ramachandran Siddharth
Published: July 2023

We numerically show that controlling the power of a low-power 500 ps-pulse seed can, via intermodal Raman scattering, tune the wavelength of a ~MW peak power level 100-fs soliton, yielding a versatile color-tunable all-fiber energetic ultrafast pulse source.
Electro-optic sampling of the waveforms produced by an optical parametric oscillator
Authors: Kempf Hannes , Breuning Felix , Muraviev Andrey , Leitenstorfer Alfred , Vodopyanov Konstantin
Published: July 2023

We report field-resolved detection of few-cycle pulses generated by a subharmonic optical parametric oscillator (OPO) with an octave-wide spectrum centered at 4 µm using near-infrared probe pulses phase-locked to the OPO output.
Generation of isolated-attosecond pulses driven by a post-compressed Yb laser
Authors: Chen Ming-Chang
Published: July 2023

We introduce a new post-compression, cascaded focus and compression, to achieve 50-fold compression of millijoule-level pulses at 1030 nm from 157 fs to 3.1 fs, with an output pulse energy of 0.98 mJ and an overall efficiency of 73%. When driving high-harmonic generation, these single-cycle pulses enable the creation of a carrier-envelope-phase-dependent extreme ultraviolet continuum with energies extending up to 180 eV, providing isolated ≈ 290-attosecond pulses at the output.
Hyperdimensional spin-orbit microlaser
Authors: Zhang Zhifeng , Zhao Haoqi , Wu Shuang , Wu Tianwei , Qiao Xingdu , Gao Zihe , Agarwal Ritesh , Longhi Stefano , Litchinitser Natalia M. , Ge Li , Feng Liang
Published: July 2023

Despite the rapid development of photonic devices and systems, on-chip information technologies are mostly limited to two-level systems due to the lack of sufficient reconfigurability. Here, we demonstrate a high-dimensional, spin-orbit microlaser for chip-scale flexible generation and manipulation of arbitrary four-level states. Two microcavities coupled through a non-Hermitian synthetic gauge field are designed to emit spin-orbit-coupled states of light with six degrees of freedom (DOFs). The vectorial state of the emitted laser beam in free space can be mapped on a Bloch hypersphere defining an SU(4) symmetry, demonstrating dynamical generation and reconfiguration of high-dimensional superposition states with high fidelity.
Electrically tunable high-contrast optical modulator based on the phase transition of vanadium dioxide
Authors: King Jonathan , Wan Chenghao , Deshpande Sanket , Park Tae Joon , Zhang Zhen , Ramanathan Shriram , Kats Mikhail A.
Published: July 2023

We designed and demonstrated an electrically controllable optical switch enabled by the phase transition of thin-film vanadium dioxide integrated with metallic aperture antennas that serve as both a frequency-selective surface and a microheater.
Strong Visible Defect Luminescence From Infrared-Pumped Barium Fluorosilicate Glass Fiber
Authors: Pietros Alexander R. , Rebeszko Kacper , Rosenbaum Jacob R. , Stone Miranda P. , Brasovs Artis , Kornev Konstantin G. , Hawkins Thomas , Cavillon Maxime , Ballato John , Dragic Peter D.
Published: July 2023

A barium fluorosilicate glass fiber, when pumped in the infrared, exhibits powerful green luminescence whose intensity maintains a Pekarian-lineshape. Combined with correlated Raman spectroscopy, oxygen-excess surface defects are suggested as the origin.
Large-area InP laterally grown on SOI for Micro-lasers and Fabry-Perot lasers
Authors: Li Jie , Xue Ying , Xu Ke , Xing Zengshan , Wong Kam Sing , Lau Kei May
Published: July 2023

Tuning the initial growth conditions of the low-temperature-InP (LT-InP) nucleation layer, we grew large-area InP laterally on SOI wafers using lateral aspect ratio trapping (LART) with high crystalline quality, on which small micro-lasers and large Fabry-Perot (FP) lasers with low lasing thresholds were demonstrated.
Inverse designed nanophotonics in thin-film lithium niobate
Authors: Shang Chengfei , Yang Jingwei , Hammond Alec M. , Chen Zhaoxi , Chen Mo , Lin Zin , Johnson Steven G. , Wang Cheng
Published: July 2023

We develop a 3D gradient-based inverse design model specially tailored for the LNOI platform, and experimentally demonstrate a spatial-mode multiplexer, a waveguide crossing and a compact waveguide bend with low loss and crosstalk.
133 fs Pulses generated in Colliding-Pulse Mode-Locking, Enable Record χ2 Frequency Conversion
Authors: Janjua B. , Iu M. L. , Leger Z. , Yan Z. , Helmy A. S.
Published: July 2023

We demonstrate a colliding-pulse mode-locked Bragg reflection laser. Record short pulse widths of 133 femtoseconds exhibit high peak power of ~240 mW; thus enables a record difference frequency generation conversion efficiency of -38 dB.
Passive On-Chip Nonlinear Optical Isolator
Authors: White Alexander D. , Ahn Geun Ho , Van Gasse Kasper , Vučković Jelena
Published: July 2023

We demonstrate fully passive optical isolators in silicon nitride nanophotonics using the intrinsic Kerr nonlinearity. These devices achieve up to 35dB isolation and can serve to both stabilize and isolate on-chip lasers.
Inverse-designed linear coherent photonic networks for high-resolution spectral reconstruction
Authors: Li Yuan , Zhang Zunyue , Wang Yi , Yu Yue , Zhou Xuetong , Tsang Hon Ki , Sun Xiankai
Published: July 2023

We proposed and demonstrated integrated photonic networks composed of inverse-designed components for spectral reconstruction. We reconstructed spectral lines separated by 100 pm and continuous spectra from a device with an ultracompact footprint of 88×300 μm2.
Inverse design of optical switch with meta-learning
Authors: Lou Beicheng , Rodríguez Jesse A , Wang Benjamin , Cappelli Mark , Fan Shanhui
Published: July 2023

We introduce a novel way of designing active structure based on bi-level optimization, in analogy to meta-learning. We demonstrate our method with an example of compact optical switch design and discuss its broader applications.
On-chip Bragg grating inscription in As2Se3 rib waveguides via photosensitivity at 1550 nm
Authors: Lai Choon Kong , Merklein Moritz , Choi Duk Yong , Yan Kun Lun , Bedoya Alvaro Casas , Madden Stephen , Eggleton Benjamin
Published: July 2023

We present the experimental observation of 1550 nm laser-induced Hill-type gratings in As2Se3 rib waveguides. Such gratings exhibit narrow reflection bandwidth and highly tailorable resonant wavelengths, allowing versatile functionalities in nonlinear integrated circuits.
Pillar-Based High-Yield Heterogeneous Integration of Lithium Niobate and Gallium Phosphide Thin Films
Authors: Vandekerckhove Tom , Vanackere Tom , De Witte Jasper , Cuyvers Stijn , Reis Luis , Billet Maximilien , Roelkens Günther , Clemmen Stéphane , Kuyken Bart
Published: July 2023

Several established photonic platforms lack a nonzero Pockels and nonlinear coefficient. We developed a micro-transfer printing method to heterogeneously integrate thin-film lithium niobate and gallium phosphide with an experimentally shown transfer yield of near-unity.
Sub-2-cycle GW-peak-power 9.5 µm OPA
Authors: Leshchenko Vyacheslav , Agostini Pierre , DiMauro Louis F.
Published: July 2023

We present an optical parametric amplifier ( OPA) p umped with a 2.4 µm Cr:ZnSe laser and generating 93 µJ pulses at 9.5 µm, 1 kHz with sub-2-cycle pulse duration, 1.6 GW peak power, and excellent beam quality. The results open a wide range of applications in attosecond physics (especially in solids), remote sensing, and bio-relevant spectroscopy.
Long Wavelength Infrared Few-Cycle Pulse Generation Seeded by Self-Phase Modulation Enabled Spectral Selection in Single-Mode Fiber
Authors: Prakash Neeraj , Huang Shu-Wei
Published: July 2023

We demonstrate few-cycle optical parametric amplifier tunable from 7.8 - 9.9 μm, seeded by self-phase modulation enabled spectral selection in single-mode HI1060 fiber. The system produces idler energy of 5 nJ with M2 of 1.6.
Spatial Coherence of Chaotic-Cavity Surface-Emitting Lasers
Authors: Alkhazragi Omar , Dong Ming , Chen Liang , Liang Dong , Ng Tien Khee , Zhang Junping , Bagci Hakan , Ooi Boon S.
Published: July 2023

The intentional reduction of spatial coherence of vertical-cavity surface-emitting lasers by employing chaotic cavities is demonstrated. The design doubled the number of modes and increased the efficiency, enabling communication, sensing, and imaging with low-speckle illumination.
Nonlinear Optoelectronic Filter-Array for Intelligent Glare Reduction
Authors: Zhang Dehui , Xu Dong , Li Yuhang , Luo Yi , Hu Jingtian , Huang Yu , Ozcan Aydogan , Duan Xiangfeng
Published: July 2023

We integrate two-dimensional transparent photodetectors with liquid crystal modulators to form a nonlinear filter-array, allowing self-amplitude-modulation of light at low-intensity levels (<100 mW/cm2). We fabricated 10,000 devices over 1 cm2 to demonstrate glare reduction.
All-Optical Kerr Synchronization of a Dissipative Kerr Soliton Microcomb to an Optical Reference for Clockwork Operation
Authors: Moille Grégory , Stone Jordan , Chojnacky Michal , Menyuk Curtis , Srinivasan Kartik
Published: July 2023

We demonstrate Kerr-mediated all-optical synchronization of a dissipative Kerr solition with an external reference laser in a single microring resonator. It enables passive stability transfer and frequency division for optical clock metrology applications.
AlGaN Deep UV micro-LED Array Integrated Quantum Dots for Solar-Blind and Visible-Light Communication
Authors: Memon Muhammad Hunain , Wang Danhao , Yu Huabin , Jia Hongfeng , Sun Haiding
Published: July 2023

To enable dual-wavelength emission by vertically integrating DUV micro-LED array and QDs applicable for both solar blind communication and visible light communication, exclusively for underwater communication, have been presented.
Experimental Demonstration of Orbital Angular Momentum Multiplexed Free-Space Optical Chaos-based Communications
Authors: Zhang Yiqun , Xu Mingfeng , Jiang Ning , Pu Mingbo , Zhou Mengjie , Chen Shuangcheng , Lavery Martin P. J. , Abbas Hassan T. , Hu Gang , Qiu Kun , Luo Xiangang
Published: July 2023

We experimentally demonstrate and characterize the performance of two orbital angular momentum modes multiplexed free-space optical communications based on all-optical chaotic modulation. High-quality chaos synchronization and transmission capacity of 12-Gbit/s secure communications are successfully achieved.
2×2 Broadband Thermo-optic Polarization-insensitive Switch on the SOI Platform
Authors: Li Weijia , Xu Luhua , Wei Zixian , Mao Deng , Zhang Jinsong , D'Mello Yannick , Plant David V.
Published: July 2023

We demonstrate a 2×2 CMOS-compactable, fabrication-tolerant, polarization-insensitive Mach-Zehnder switch based on thermo-optic engineering, with extinction ratios > 15 dB, insertion losses < 2.3 dB and polarization-dependent losses < 1 dB over a 100-nm wavelength range.
18 GHz Frequency Comb in the UV via On-Chip Cascaded Harmonics
Authors: Ludwig Markus , Ayhan Furkan , Voumard Thibault , Wildi Thibault , Gaafar Mahmoud A. , Grassani Davide , Obrzud Ewelina , Schmidt Tobias , Bouchy François , Villanueva Luis Guillermo , Brasch Victor , Herr Tobias
Published: July 2023

We report on an 18 GHz repetition-rate electro-optic frequency comb centered at 390 nm via on-chip cascaded harmonic generation covering more than 2000 lines across 40 THz of optical bandwidth.
Monolithic MQW Polarization Mode Controller Integrated with Sidewall Grating DFB Laser
Authors: Sun Xiao , Cheng Weiqing , Liang Song , Ye Shengwei , Huang Yongguang , Sun Yiming , Zhang Ruikang , Xiong Jichuan , Liu Xuefeng , Marsh John H. , Hou Lianping
Published: July 2023

An AlGaInAs MQW polarization mode rotator is monolithically integrated with a side wall grating DFB laser and differential phase shifter to achieve TE to circular and then linear polarization conversion.
Generation of Longitudinally Structured Light Sheets Using Deep Neural Holography
Authors: Asoudegi Nima , Dorrah Ahmed , Mojahedi Mo
Published: July 2023

We present a neural network holographic system based on superposition of Bessel beams that generates high quality images on a single or multiple planes perpendicular to the hologram plane in real time for AR/VR applications.
100-km Polarization-Orthogonal Self-Homodyne Coherent WDM Transmission Using Nonlinearity Suppressed SOA
Authors: Li Weihao , Chen Junda , Zhou Ziwen , Chen Yizhao , Zhang Mingming , Zeng Yifan , Chen Zexin , Tang Ming
Published: July 2023

We propose an SOA enabled polarization-orthogonal SHC WDM transmission scheme utilizing multiple-wavelength orthogonal LOs for nonlinearity suppression. Successful 800Gb/s 4-channel WDM transmission is demonstrated over 100km SSMFs.
Transforming the idler of an OPCPA system into a high-fidelity pulse
Authors: Bucht Sara , Roides Richard G. , Webb Ben , Haberberger Dan , Feng Chengyong , Froula Dustin H. , Bromage Jake
Published: July 2023

This paper describes an alternate mode of operating an existing petawatt class laser (MTW-OPAL) to utilize the idler by addressing angular dispersion and spectral phase reversal.
Parallel chaotic sources based on microcombs
Authors: Shen Bitao , Shu Haowen , Xie Weiqiang , Chen Ruixuan , Liu Zhi , Zhang Xuguang , Wang Yimeng , Zhang Yunhao , Cheng Buwen , Yu Shaohua , Bowers John E. , Chang Lin , Wang Xingjun
Published: July 2023

Massively parallel optical chaotic sources with large bandwidth are demonstrated based on chaotic microcombs in the AlGaAsOI platform. 30-channel parallel random bit generation with 30 Gbit/s per channel is realized based on the chaotic source.
Dispersion engineering with coupled microresonators for extended soliton microcomb control
Authors: Pidgaiko Dmitrii , Riemensberger Johann , Tusnin Aleksandr , Stroganov Anton , Tikan Alexey , Kippenberg Tobias J.
Published: July 2023

We investigate coupled-resonator dispersion engineering capabilities for con-trolling the shape of the soliton microcomb in real time.
Ultra-Compact Bimodal Interferometric Plasmonic Sensor Integrated on a Polymeric Photonic Waveguide Platform
Authors: Fotiadis K. , Spasopoulos D. , Chatzianagnostou E. , Bellas D. , Bhalerao O. , Suckow St. , Lidorikis E. , Pleros N.
Published: July 2023

We demonstrate an ultra-compact bimodal interferometric plasmonic refractive index sensor co-integrated for the first time on a SU-8 photonic waveguide platform. After optimization process the proposed sensor exhibited an experimental sensitivity of 4464 nm/RIU.
All-Fiber Visible Light Generation using Orbital Angular Momentum mediated Parametric Nonlinearities
Authors: Bhumkar Purva , Demas Jeffrey , Ramachandran Siddharth
Published: July 2023

Multi-stage four-wave mixing governed by orbital angular momentum selection rules enables all-fiber generation of visible light at 659 nm that is power-scalable.
High Resolving Power Arrayed Waveguide Grating with Spiral Reusable Delay Lines (SRDL-AWG)
Authors: Zhang Yang , Hsu Wei-Lun , Gatkine Pradip , Veilleux Sylvain , Dagenais Mario
Published: July 2023

An arrayed waveguide grating with spiral reusable delay lines (SRDL-AWGs) with a resolving power of 111,330 is experimentally demonstrated. The device is over 100 times more compact than the traditional AWGs.
Designing Structured Light Fields
Authors: Zamboni-Rached M. , Nobrega K. Z. , Aborahama Yousuf , Mojahedi Mo
Published: July 2023

We present a new optimization technique for designing three-dimensional profiles of optical fields in homogeneous and linear medium. Both theoretical and experimental results are reported.
Generation of galaxy-shaped surface relief in azo-polymers with Laguerre-Gaussian beams
Authors: Suzuki Daisuke , Tomita Arata , Vallés Adam , Miyamoto Katsuhiko , Omatsu Takashige
Published: July 2023

We present the first demonstration of vortex surface reliefs with 2-, 4- and 6-spiral arms in azopolymers, herein termed a ‘galaxy-shaped surface relief’ by employing petal-like modes, formed of the positive and negative Laguerre-Gaussian modes.
A highly stable and 2.4 × 109 quality factor packaged microrod resonator
Authors: Li Chang , Chen Wen , Duan Bing , Wang Heng , Wang Chuan , Wen Huashun , Zhu Ninghua , Yang Daquan
Published: July 2023

We demonstrate a highly stable and ultrahigh quality factor of 2.4 × 109 packaged microrod resonator in which Kerr optical frequency combs are generated to realize data transmission at total rate up to 100 Gb/s.
Nonreciprocal Interparticle Forces in Kerker Dimers
Authors: Jazayeri Amir M. , Abdelhafiz Sohila , Dogariu Aristide
Published: July 2023

We show that, for a two-Kerker-particle system, the interparticle forces are so highly nonreciprocal that the force on the center-of-mass can be opposite to the propagation direction of incident light.
High-order harmonics generation in Cd and Pd laser-induced plasmas
Authors: Ganeev Rashid A. , Kim Vyacheslav V. , Butikova Jelena , Atvars Aigars , Grube Jurgis , Sarakovskis Anatolijs , Ubelis Arnolds
Published: July 2023

We demonstrate the generation of high-order harmonics of laser pulses in palladium and cadmium plasmas. We adjusted the wavelength of driving pulses to investigate the resonance enhancement in different ranges of extreme ultraviolet region. The summation of incommensurate waves during the two-color pump of Pd and Cd plasmas allowed the generation of a broader range of harmonics. The theoretical aspects of the two-color pump of the laser-induced plasma are discussed.
Ultrashort and high-collimation X/γ-rays generated by nonlinear inverse Thomson scattering between off-axis electrons and circularly polarized intense laser pulses
Authors: Qingyu Yang , Yubo Wang , Youwei Tian
Published: July 2023

The properties of nonlinear inverse Thomson scattering (NITS) are investigated in the collision between a circularly polarized tightly focused intense laser pulse and a relativistic off-axis electron with numerical simulations. Due to the asymmetric effect of the laser field on the off-axis electrons, the electron trajectory is torqued to the off-axis direction, and the symmetry of the spatial radiation is also destroyed, which causes the concentrations of the radiation in the off-axis direction. With the increase of laser intensity, the torsion effect is more obvious, the radiation collimation improves, the direction turns to sideways. With the increase of electron’s initial energy, the direction turns back to backwards and the degree of off-axis effect decreases. In both cases, the power exponentially enhances, the pulse width shortens, the spectrum broadens and super-continuity appears. With the laser intensity, the duration of sideways X-ray pulse from the low-energy (2.61MeV) electron is only 0.2 as, and the normalized intensity reaches 109. While using ultra-high-energy (100MeV) electrons, the duration of backwards γ-ray pulse reaches 1.22 zs, and the normalized intensity reaches 1017. These results help the understanding of nonlinear Thomson scattering and provide important numerical references for the research of NITS as high-quality X-ray and γ-ray sources.
Honey bees and social wasps reach convergent architectural solutions to nest-building problems
Authors: Smith Michael L. , Loope Kevin J. , Chuttong Bajaree , Dobelmann Jana , Makinson James C. , Saga Tatsuya , Petersen Kirstin H. , Napp Nils
Published: July 2023

The hexagonal cells built by honey bees and social wasps are an example of adaptive architecture; hexagons minimize material use, while maximizing storage space and structural stability. Hexagon building evolved independently in the bees and wasps, but in some species of both groups, the hexagonal cells are size dimorphic—small worker cells and large reproductive cells—which forces the builders to join differently sized hexagons together. This inherent tiling problem creates a unique opportunity to investigate how similar architectural challenges are solved across independent evolutionary origins. We investigated how 5 honey bee and 5 wasp species solved this problem by extracting per-cell metrics from 22,745 cells. Here, we show that all species used the same building techniques: intermediate-sized cells and pairs of non-hexagonal cells, which increase in frequency with increasing size dimorphism. We then derive a simple geometric model that explains and predicts the observed pairing of non-hexagonal cells and their rate of occurrence. Our results show that despite different building materials, comb configurations, and 179 million years of independent evolution, honey bees and social wasps have converged on the same solutions for the same architectural problems, thereby revealing fundamental building properties and evolutionary convergence in construction behavior.
The Canadian Open Neuroscience Platform—An open science framework for the neuroscience community
Authors: Harding Rachel J. , Bermudez Patrick , Bernier Alexander , Beauvais Michael , Bellec Pierre , Hill Sean , Karakuzu Agâh , Knoppers Bartha M. , Pavlidis Paul , Poline Jean-Baptiste , Roskams Jane , Stikov Nikola , Stone Jessica , Strother Stephen ,   CONP Consortium, Evans Alan C.
Published: July 2023

The Canadian Open Neuroscience Platform (CONP) takes a multifaceted approach to enabling open neuroscience, aiming to make research, data, and tools accessible to everyone, with the ultimate objective of accelerating discovery. Its core infrastructure is the CONP Portal, a repository with a decentralized design, where datasets and analysis tools across disparate platforms can be browsed, searched, accessed, and shared in accordance with FAIR principles. Another key piece of CONP infrastructure is NeuroLibre, a preprint server capable of creating and hosting executable and fully reproducible scientific publications that embed text, figures, and code. As part of its holistic approach, the CONP has also constructed frameworks and guidance for ethics and data governance, provided support and developed resources to help train the next generation of neuroscientists, and has fostered and grown an engaged community through outreach and communications. In this manuscript, we provide a high-level overview of this multipronged platform and its vision of lowering the barriers to the practice of open neuroscience and yielding the associated benefits for both individual researchers and the wider community.
Climate change and agriculture nexus in Bangladesh: Evidence from ARDL and ECM techniques
Authors: Ghosh Bikash Chandra , Eyasmin Farjana , Adeleye Bosede Ngozi
Published: July 2023

The erratic weather puts farming households of Bangladesh at high production risk with significant consequences on food production, income, and livelihood. This study attempts to find the effect of various climate change indicators on agriculture in Bangladesh over the period 1980–2014. The study used the ARDL bounds testing approach to assess the long-run associations and the Granger causality test to determine the causal relationships between the regressors and dependent variables. The outcomes revealed that the first lag of agricultural value-added, second lag of carbon emissions, and average rainfall have a positive impact while the first lag of carbon has negative and significant impacts on agricultural production in the long run; in the short run-past realizations of carbon emission have a negative and significant impact on agricultural value-added. Additionally, the results show a unidirectional causality from carbon emission to agricultural output, agricultural output to average rainfall, and agricultural output to energy consumption. The study fills the gap in the climate change literature by applying the ARDL method to establish the nexus between climate change and agricultural output in Bangladesh.