bluuebunny/crossref_metadata_2025 huggingface dataset:
Complete, Single Shot, Spatiotemporal Measurement of a Terawatt Laser System
Authors: Grace Elizabeth , Ma Tammy , Jafari Rana , Guang Zhe , Park Jaebum , Stuart Brent , Clark Jerry , Kemp Elijah , Maricle Stephen , Moody Jim , Shepherd Ronnie , Trebino Rick
Published: September 2020

A single shot, complete spatiotemporal measurement of the complex electric field E(x, y, z, ؛) emitted by a high power (> 0.1 TW) laser is demonstrated for the first time. We generate movies of the laser’s electric field E (x, y, z, t) before and after the chirped pulse amplification chain and examine the temporal, spectral, and spatial field features.
Real-time spectroscope characterization for acousto-optical dynamics analysis in fiber
Authors: Cao Yulong , Li Yujia , Gao Lei , Huang Ligang , Ikechukwu Iroegbu Paul , Zhu Tao
Published: September 2020

We propose a dissipative-soliton assisted dispersive Fourier transform technology for ultra-fast spectroscope characterization of controllable passive devices. The transient spectra of the acoustically-induced fiber grating are emerged with a frame rate of MHz scale.
Inverse-designed optical interconnect based on multimode photonics and mode-division multiplexing
Authors: Yang Ki Youl , Skarda Jinhie , Guidry Melissa A. , Dutt Avik , Fan Shanhui , Vuckovic Jelena
Published: September 2020

We experimentally demonstrate inverse-designed multimode silicon photonics for on-chip interconnect. Inverse design enables spatial mode conversion, multimode waveguide bending, and mode-division beam splitting with compact footprint and low insertion loss.
Efficient, narrow profile waveguide crossings based on rapid adiabatic coupling
Authors: Fargas Cabanillas Josep M. , Zhang Bohan , Popović Miloš A.
Published: September 2020

We demonstrate an efficient silicon waveguide crossing based on the rapid adiabatic coupling (RAC) concept. Insertion loss and crosstalk are under 0.05 dB and -50 dB in simulation and under 0.3 dB and -17 dB in experiment across a 100 nm bandwidth.
A Theoretical Analysis of a Resonator-Assisted Silicon Photonic Interleaver
Authors: Huang Zi-cong , Meng Xiang , Osgood Richard
Published: September 2020

We presented new physical insights into designing resonator-assisted photonic interleavers. The robust flat-top transmission spectra of the devices can be achieved and interpreted through rigorous mathematical models based on quasi Fourier series.
Integration of III-V on Silicon Gain Devices At the Backside of Silicon-on-Insulator Wafers For Photonic Fully Integrated Circuits
Authors: Menezo Sylvie , Thiessen Torrey , Mak Jason , Da Fonseca Jérémy , Ribaud Karen , Yon Zheng , Jany Christophe , Poon Joyce K. S.
Published: September 2020

We present a new platform integrating heterogeneous III-V/silicon gain devices at the backside of silicon-on-insulator wafers. The fabrication relies on commercial silicon photonic processes. The performances of lasers and SOAs fabricated accordingly are reported.
Efficient Second Harmonic Generation in GaAs-on-Insulator Waveguides
Authors: Stanton Eric J. , Chiles Jeff , Nader Nima , Moody Galan , Chang Lin , Bowers John E. , Nam Sae Woo , Mirin Richard P.
Published: September 2020

Second-harmonic generation is demonstrated with 38 W-1 conversion efficiency in a single-pass waveguide. A highly uniform wafer-scale process is used to fabricate these devices, which are suitable for frequency-comb stabilization.
On-chip High-efficiency Channel-selective Wavelength Multicasting of PAM3/PAM4 Signals Using an AlGaAsOI Waveguide
Authors: Qin Jun , Shu Haowen , Chang Lin , Xie Weiqiang , Tao Yuansheng , Jin Ming , Wang Xingjun , Bowers John E.
Published: September 2020

A high-efficiency one-to-six wavelength multicasting scheme for 10 Gbaud PAM3 /PAM4 signal based a high nonlinearity AlGaAsOI waveguide is experimentally demonstrated. The average conversion efficiency for the output multicasting channels is -11.2 dB, all with BER under 10-4.
Low-frequency noise stabilization in optomechanical inertial accelerometers for high-resolution sensing
Authors: Flores Jaime Gonzalo Flor , Wang Wengting , Huang Yongjun , Wu Jiagui , Yerebakan Talha , Bai Qingsong , Wong Chee Wei
Published: September 2020

We demonstrate a solid-state optomechanical resonator driven into oscillation mode for high resolution acceleration sensing. The low-frequency performance is greatly increased to 70^g/Hz1/2 at 10-3 Hz when the resonant wavelength detuned pump laser is stabilized.
An angular velocity sensor using machine learning and optical orbital angular momentum
Authors: Strong Elizabeth F. , Anderson Alexander Q. , Heffernan Brendan M. , Brenner Michael P. , Gopinath Juliet T. , Rieker Gregory B.
Published: September 2020

We demonstrate a means for measuring the angular velocity of small particles using light with orbital angular momenhrm and a machine learning signal processing toolbox. This approach is applicable to studying turbulence at small scales.
Simultaneous Strain and Force Sensing in an Antiresonant Fiber Featuring Enhanced Modal Interference
Authors: Goel Charu , Parrot Matyas , Zang Jichao , Yoo Seongwoo
Published: September 2020

We evaluate the performance of a multi-parameter fiber sensor utilizing microrestructuring of hollow core anti-resonant fiber parameters to enhance modal interference pattern. The resulting sensor allows to simultaneously measure both strain and transversal force.
A 3-D integrated photonics platform with deterministic geometry control
Authors: Michon Jérôme , Geiger Sarah , Li Lan , Gonçalves Claudia , Lin Hongtao , Richardson Kathleen , Jia Xinqiao , Hu Juejun
Published: September 2020

We report a fully-packaged 3-D integrated photonics platform with devices placed at arbitrary pre-defined locations in 3-D. We further demonstrated the application of the platform to mechanical strain sensing.
Multimode Q-switching and Spatiotemporal Mode-locking in Multimode Fiber Lasers
Authors: Liu Kewei , Xiao Xiaosheng , Zhang Xiaoguang , Yang Changxi
Published: September 2020

Multimode Q-switching and spatiotemporal mode-locking are achieved in multimode fiber lasers. The transition between multimode Q-switching and spatiotemporal mode-locking is experimentally revealed.
Monolayer Passivation of Silica Resonators to Prevent Excess Thermal Line Broadening
Authors: Jeong Dongin , Lee Hansuek
Published: September 2020

We report passivation of silica resonators with hexamethyldisilazane which prevents excess thermal line broadening by water adsorption without degradation of Q-factor. Soliton mode locking was demonstrated with the passivated resonators kept in moisturized atmosphere.
Ridge-width dependence of the dispersion and performance of mid-infrared quantum cascade laser frequency combs
Authors: Wang Ruijun , Kapsalidis Filippos , Shahmohammadi Mehran , Beck Mattias , Faist Jérome
Published: September 2020

We investigate the effects of ridge width on the characteristics of quantum cascade laser frequency combs and study how to achieve optimal performance. Very narrow ridges lead to much broader lasing spectra but also result in weaker comb stability.
Hybrid Silicon and Lithium Niobate Mach-Zehnder Modulators with High Bandwidth Operating at C-band and O-band
Authors: Sun Shihao , He Mingbo , Yu Siyuan , Cai Xinlun
Published: September 2020

We first demonstrate a hybrid silicon and lithium niobate Mach-Zehnder modulator operating at C-band and O-band simultaneously. The device shows high Electro-optic modulation efficiency and bandwidth beyond 70 GHz with ultra-wide band operation.
Hybrid two-dimensional-material photonics with bound states in the continuum
Authors: Yu Zejie , Wang Yi , Sun Beilei , Tong Yeyu , Xu Jian-Bin , Tsang Hon Ki , Sun Xiankai
Published: September 2020

We introduced a new scheme for integrating 2D materials with photonic integrated circuits by harnessing bound states in the continuum. We demonstrated efficient thermo-optic and electro-optic modulation on a hybrid graphene/LiNbO3 platform with this approach.
Towards the smallest anisotropic structures by ultrafast laser writing in silica glass
Authors: Lei Yuhao , Sakakura Masaaki , Wang Lei , Yu Yanhao , Wang Huijun , Kazansky Peter G.
Published: September 2020

A localized nanoplane modification was created in silica glass with a few femtosecond laser pulses. Fast writing of anisotropic structures and high-density data storage can be achieved.
Dehydrogenation Condensation by Intense Laser Irradiation of Liquid Hexane Creating Dodecane Isomers
Authors: Ishikawa Wakako , Sato Shunichi
Published: September 2020

Liquid hexane was irradiated by focused femtosecond laser pulses. The GC-MS analysis of the samples suggested that the major process was the dehydrogenation condensation of hexane producing dodecane and its structural isomers.
Broadband Quasi-Phase-Matching in All-Optically Poled Stoichiometric Silicon Nitride Waveguides
Authors: Nitiss Edgars , Zabelich Boris , Bres Camille-Sophie
Published: September 2020

We show how broadband (>30nm) quasi-phase matching in all-optically poled Si3N4 waveguides provides a platform for efficient sum-frequency generation, and for femtosecond pulse processing such as fcEo detection without the need for group velocity engineering.
DMD Reduction by Strong Mode Coupling in Few-mode Fibers Using Multi-laser Inscribed LPFGs
Authors: Wang Xutao , Yang Zhiqun , Yu Wenbo , Liu Yaping , Di Zixiang , Li Guifang , Zhang Lin
Published: September 2020

We propose to use multiple lasers to write long-period gratings into few-mode fibers for significant reduction of the mean DMD by 280 times from 1700 to 6.2 ns at 1500 km.
Nonlinearity-Aware OAM Mode-Group Multiplexed Transmission over 1-km Ring-Core Fiber with Low HighOrder Inter-Mode-Group Crosstalk
Authors: Zhang Junwei , Liu Junyi , Lin Zhenrui , Liu Jie , Shen Lei , Yu Siyuan
Published: September 2020

Based on a ring-core fiber (RCF) with low high-order inter-mode-group crosstalk, OAM mode-group multiplexed transmission using polynomial nonlinear equalizer over 1-km RCF is successfully demonstrated, achieving an effective electrical spectrum efficiency of ~7.2 bit/s/Hz.
Ultrafast Coherent Vibrational Spectroscopy Using Infrared Four Wave Mixing
Authors: Wang Jizhou , Wang Kai , Shen Yujie , Han Zehua , Sokolov Alexei V. , Scully Marian O.
Published: September 2020

We experimentally demonstrate a femtosecond coherent vibrational spectroscopy based on infrared four wave mixing. The technique can be applied to obtain a chemical image of biological tissue combined with microscopy.
Real-time frequency-encoded spatiotemporal focusing
Authors: Wei X. , Shen Y. , Jing J. C. , Hemphill A. S. , Yang C. , Xu S. , Yang Z. , Wang L. V.
Published: September 2020

We present a novel real-time frequency-encoded spatiotemporal (FEST) focusing technology using a programmable two-dimensional optical frequency comb. This technique enables, for the first time, simultaneous spatial and temporal focusing at microseconds through thick scattering media.
Fast and Wide Field-of-View Microscopy using a Coded Aperture
Authors: Shin Jaewook , Kilic Velat , Foster Mark A.
Published: September 2020

Microscopes suffer from limited space-bandwidth product at high frame rates due to data collection bottlenecks. We demonstrate a coded aperture compressive microscope that enhances the space-bandwidth product of high-speed imagers.
Optogenetic control of calcium signaling over individual cells with a micro-LED array
Authors: Mao Dacheng , Xiong Zheshun , Li Ningwei , Sun Yubing , Xu Guangyu
Published: September 2020

We report a 16 µm-pitched micro-LED array that enables single-cell optogenetics with in vitro calcium imaging. Our LEDs can output bright, localized light to optogenetically address cells that are sub-10 µm apart with low crosstalk.
Nanophotonic Biomolecular Sensor with Passive Molecule Trapping Functionality
Authors: Miao Xianglong , Yan Lingyue , Wu Yun , Liu Peter Q.
Published: September 2020

We experimentally demonstrate a nanophotonic biomolecular sensor which can passively concentrate and trap biomolecules in a drying analyte solution to regions of device structures where the field is highly enhanced, leading to improved sensing performance.
Laser Self-Injection Locked Frequency Combs in a Normal GVD Integrated Microresonator
Authors: Lihachev Grigory V. , Liu Junqiu , Chang Lin , He Jijun , Wang Rui Ning , Guo Joel , Raja Arslan S. , Lucas Erwan , Pavlov Nikolay G. , Jost John D. , Kinghorn Dave , Bowers John E. , Kippenberg Tobias J.
Published: September 2020

We report the first demonstration of microresonator dark pulse generation by self-injection locking of a DFB laser to a Si3N4 microresonator with normal GVD. The 26 GHz repetition rate beatnote is characterized. ©2020 The Author(s)
Generation of Flat Optical Frequency Comb Using Integrated Cascaded Lithium Niobate Modulators
Authors: Xu Mengyue , He Mingbo , Cai Xinlun
Published: September 2020

Optical frequency comb with 9 lines, 20 GHz spacing and 0.89 dB flatness is generated by cascading modulators on the lithium niobate-on-insulator platform. The device features an on-chip optical loss less than 1.19 dB.
Semiconductor laser integration for octave-span Kerr-soliton frequency combs
Authors: Briles T. C. , Chang L. , Xiang C. , Guo J. , Kinghorn D. , Stone J. , Yu S. , Moille G. , Srinivasan K. , Bowers J. E. , Papp S. B.
Published: September 2020

We report octave spanning frequency combs generated by self-injection locking a distributed feedback laser to a Kerr microresonator. This method benefits from mitigated thermal transients and eliminates an optical isolator which simplifies photonic integration. ©2020 The Author(s)
kW-peak Power Level Blue Light Sources via a Hybrid Fiber and Crystal Nonlinear Process Using Higher Order Modes
Authors: Lindberg Robert , Liu Xiao , Ramachandran Siddharth , Pasiskevicius Valdas
Published: September 2020

We generate high peak-power, Gaussian-shaped 486-nm pulses using a PPKTP crystal that performs simultaneous frequency doubling and nonlinear mode conversion, and FWM in the LP07 mode of a fiber.
Multi-color, repetition-rate tunable, energetic femtosecond source aiming for multimodal nonlinear microscopy
Authors: Yu Yang , Fang Shaobo , Teng Hao , Zhu Jiangfeng , Wang Junli , Chang Guoqing , Wei Zhiyi
Published: September 2020

We demonstrate an energetic ultrafast laser source that simultaneously provides three-color pulses tunable from 925 nm to 1150 nm with energy up to 75 nJ. The repetition-rate can be tuned from 1 to 20 MHz.
All-fiber wavelength-tunable Bi-doped laser employing a fiber Bragg grating operating in the 1300nm band
Authors: Wang Siyi , Wang Yu , Thipparapu Naresh K. , Ibsen Morten , Richardson David J. , Sahu Jayanta K.
Published: September 2020

We present a Bi-doped fiber laser (BDFL) at 1340nm with >170mW output power and 35% slope efficiency. A wavelength-tunable version of the BDFL facilitated by an FBG is demonstrated from 1315-1340nm with >120mW output power.
Self-injected piezoelectric optomechanical crystal
Authors: Ghorbel Inès , Bénéfice Maëlle , Zhu Rui , Martin Aude , Morvan Loïc , Dolfi Daniel , Combrié Sylvain , Braive Rémy , De Rossi Alfredo
Published: September 2020

We show here an InGaP optomechanical crystal oscillating at 21 MHz sta-bilized by injecting a delayed copy of itself thanks to electrodes. An improvement of 20 dBc/Hz is achieved at 1 kHz offset.
Coupled Waveguides Optomechanical Device for the Investigation of the Beating Force
Authors: Kersul Cauê Moreno , Benevides Rodrigo , de Assis Pierre-Louis
Published: September 2020

We present a device composed of a pair of suspended evanescently-coupled waveguides built to investigate non-eigenmode optical forces. A disk microcavity is used for near-field optomechanical transduction of the motion driven by a modulated pump.
Hybrid mode-locked 20 GHz colliding pulse Si/III-V laser with 890 fs pulsewidth
Authors: Liu Songtao , Davenport Michael , Bowers John E.
Published: September 2020

We report the hybrid mode locking (HML) performance of a 20 GHz colliding pulse mode-locked heterogeneously integrated Si/III-V laser. By HML, the laser shows a 6.7x timing jitter reduction with minimum pulsewidth down to 890 fs.
Mid-infrared phase-controlled Fourier-transform spectroscopy
Authors: Hashimoto Kazuki , Badarla Venkata Ramaiah , Ideguchi Takuro
Published: September 2020

We develop a rapid-scan phase-controlled Fourier-transform spectroscopic technique to demonstrate broadband and high-resolution mid-infrared spectroscopy of gaseous and liquid phase molecules at a spectral acquisition rate of over 12 kHz.
Dual-Comb Hyperspectral Imaging with a High-Framerate Infrared Detector Array
Authors: Voumard Thibault , Wildi Thibault , Brasch Victor , Alvarez Raul Gutierrez , Ogando German Vergara , Herr Tobias
Published: September 2020

Dual-comb hyperspectral imaging is demonstrated using a high-framerate 128x128 pixel infrared detector array. 10 GHz wide gas-phase absorption features are well- resolved at 1 Hz-rate and extension to the entire 1-5 micron wavelength range is possible.
10-18 Optical Atomic Clock Comparisons within the Boulder Atomic Clock Network
Authors: Nardelli N. V. , Beloy K. , Bodine M. I. , Bothwell T. , Brewer S. , Bromley S. , Chen J. , Clements E. , Deschenes J. D. , Diddams S. A. , Fasano R. , Fortier T. M. , Hassan Y. , Hume D. H. , Kedar D. , Kennedy C. J. , Khader I. , Kim M. E. , Koepke A. , Leibrandt D. R. , Leopardi H. , Ludlow A. , McGrew W. F. , Milner W. , Newbury N. , Nicolodi D. , Oelker E. , Parker T. , Robinson J. M. , Schaffer S. A. , Sherman J. A. , Sinclair L. C. , Sonderhouse L. , Swann W. C. , Wineland D. J. , Yao J. , Ye J. , Zhang X.
Published: September 2020

We demonstrate optical frequency comparison of the 171Yb, 27Al+ and 87Sr atomic clocks with measurement uncertainties below 1 part in 1017, and discuss how phase-coherent and synchronous clock comparisons can be used to improve measurement stability.
Demonstration of sub-micron hot vapor cells for quantum technology applications
Authors: Talker Eliran , Zektzer Roy , Barash Yefim , Mazurski Noa , Levy Uriel
Published: September 2020

We report on the fabrication of a glass vapor cell with a scalable thickness varying from 50 nm to 30 pm. It is used to demonstrate atomic based laser stabilization at 780 nm wavelength.
Femtosecond Beam Shaping for Filament-induced Breakdown Spectroscopy
Authors: Burger M. , Polynkin P. , Jovanovic I.
Published: September 2020

We examine the utility of beam shaping for femtosecond filament-induced breakdown spectroscopy at long range. Diffraction-resistant and self-healing Bessel and Airy beams offer the advantage of longitudinally extended working zones.
Alkaline-earth Rare-earth Upconverting Nanoparticles as Bio-compatible Mechanical Force Sensors
Authors: McLellan Claire A. , Siefe Chris P. , Fischer Stefan , Casar Jason R. , Swearer Dayne F. , Goodman Miriam B. , Dionne Jennifer A.
Published: September 2020

We measure the color ratio-metric response of alkaline-earth rare-earth upconverting nanoparticles with a diamond anvil cell. We find ensembles of SrLuF particles detect 32.8 MPa in pressure change corresponding to 24 nN of force.
Perfluoropentane-in-Water Biphasic System for Low-Power Photothermal Bubble Generation and Sensitive Immunoassay
Authors: Kim Youngsun , Ding Hongru , Kollipara Pavana Siddhartha , Zheng Yuebing
Published: September 2020

A perfluoropentane-in-water system, capable of photothremally generating microbubbles at low power, was developed. This system enabled the bulk-to-surface concentration of protein for immunoassay with enhanced sensitivity and minimal loss in protein activity.
Nanophotonic Phased Arrays with Compact and Low Power Silicon Resonator Phased Shifters
Authors: Larocque Hugo , Ranzani Leonardo , Leatham James , Tate Jeffrey , Niechayev Alex , Yengst Thomas , Komljenovic Tin , Fodran Charley , Smith Duane , SoMani Mohammad
Published: September 2020

We introduce silicon nanophotonic phased arrays with ultra compact and low-power resonator phase shifters for beam steering with an average applied power of 0.4 mW per phase shifter.
High-Speed Low-Voltage Waveguide-Integrated Ge-on-Si Avalanche Photodiodes
Authors: Zhang Jin , Pejkic Ana , Kuo Bill Ping-Piu , Radic Stojan
Published: September 2020

We demonstrate waveguide-integrated silicon-germanium avalanche photodiodes. With a unity-gain responsivity of 0.95 A/W, gain of 16 and bandwidth of 33 GHz are achieved. 32 Gbaud PAM-4 eyes are demonstrated without digital signal processing.
Dynamic Mode-Switchable All-Fiber Brillouin/Erbium Laser
Authors: Xu Jiangtao , Meng Linghao , Zhang Liang , Teng Linping , Zeng Xianglong
Published: September 2020

We experimentally demonstrated a scheme of dynamic switching between LP01 and LP11 modes in a Brillouin/Erbium fiber lasers based on acoustically-induced fiber grating and realized tunable-wavelength Brillouin laser output.
Phase-locking of multiple acoustic resonances by intense optomechanical interactions in a soliton fiber laser
Authors: Yeh Dung-Han , He Wenbin , Pang Meng , Jiang Xin , Russell Philip St.J.
Published: September 2020

In a soliton fiber laser incorporating three different PCF sections and optomechanically mode-locked at around 1.94 GHz, the three acoustic core resonances are strongly driven, coupled and phase-locked by the sequence of laser pulses.
Long-range synchronization of soliton molecules in fiber ring laser cavity
Authors: Hamdi Said , Coillet Aurlien , Cluzel enoit , Grelu Philippe , Colman Pierre
Published: September 2020

We demonstrate the synchronization of two soliton molecules separated by several nanoseconds in a laser fiber ring cavity. This synchronization is accompanied by inter-molecules oscillations that are locked to the internal motion of the molecules.
Broadband, Integrated, Micron-Scale, All-Optical Si3N4/VO2 Modulators with pJ Switching Energy
Authors: Wong Herman M. K. , Yan Zhizhong , Hallman Kent A. , Marvel Robert E. , Prasankumar Rohit P. , Haglund Richard F. , Helmy Amr S.
Published: September 2020

All-optical, non-resonant, in-plane Si3N4/VO2 modulators offering 6.4 pJ switching energy, 1.68 dB/pm extinction ratio, and 4 pm length are demonstrated. This is obtained with broadband control (800-1000 nm) and signal (1500-1600 nm) wavelengths.
Pixel level demonstration of phase change material based spatial light modulation
Authors: Burrow Joshua A. , Sevison Gary A. , Asheghi Mehdi , Hendrickson Joshua R. , Sarangan Andrew , Goodson Kenneth E. , Agha Imad
Published: September 2020

We present an advancement towards high speed (sub ps) phase change material based spatial light modulators by electrically addressing single pixels with high-speed optical monitoring at 1550nm light.
Mid-Infrared Frequency Comb from a Ring Quantum Cascade Laser
Authors: Meng Bo , Singleton Matthew , Shahmohammadi Mehran , Kapsalidis Filippos , Wang Ruijun , Beck Mattias , Faist Jérôme
Published: September 2020

We report a mid-infrared quantum cascade laser frequency comb based on a ring cavity showing a predominantly sech2 profile. The reconstructed intensity shows a bright pulse waveform in the time domain.
High performance quantum cascade laser frequency combs at λ ~ 6 pm
Authors: Hakobyan Sargis , Maulini Richard , Blaser Stéphane , Gresch Tobias , Francescato Yan , Muller Antoine , Allmendinger Pitt , Mangold Markus , Jouy Pierre , Hugi Andreas
Published: September 2020

We present efficient quantum cascade laser frequency combs at 6 pm, operating from -20°C to 50°C, with a maximum total (two facets) output power of 520 mW. The dispersion of the waveguide is carefully engineered with the help of plasmonic-waveguide method to achieve efficient comb operation. 3mm, 4.5 mm and 6 mm-long devices were tested with various ridgewidths (from 2.8 μm to 5.5 μm). All the devices showed comb operation at all measured temperatures proving the reliability of the plasmonic-waveguide method.
Hot Carrier Cooling and Recombination Dynamics of Chlorine Doped Hybrid Perovskite Single Crystals
Authors: Mix L. Tyler , Lee Min-Cheol , O’Neal K. R. , Sirica N. , Tisdale Jeremy , Ghosh Dibyajyoti , Neukirch Amanda , Nie Wanyi , Prasankumar Rohit P. , Yarotski Dmitry
Published: September 2020

Methyl ammonium lead bromide (MAPbBr3) crystals, possible replacements for silicon in many photonic applications, were probed with transient reflectivity spectroscopy, revealing faster carrier cooling dynamics and slower recombination dynamics with increased chlorine doping.
Spectroscopy, Cooperative Upconversion and Optical Gain in Amorphous Al2O3:Yb3+ Waveguides on Silicon
Authors: Loiko Pavel , Agazzi Laura , Kores Cristine C. , Dijkstra Meindert , Geskus Dimitri , Pollnau Markus
Published: September 2020

Ridge waveguides in amorphous Al2O3:Yb3+ are produced by reactive co-sputtering and reactive-ion etching. Their spectroscopic properties, optical gain, and cooperative upconversion are studied and explained based on a model of distinct ion classes.
A trusted-node-free eight-user metropolitan quantum communication network
Authors: Joshi Siddarth Koduru , Aktas Djeylan , Wengerowsky Sören , Loncaric FMartin , Neumann Sebastian Philipp , Liu Bo , Scheidl Thomas , Samec Zeljko , Kling Laurent , Qiu Alex , Stipcevic Mario , Rarity John G. , Ursin Rupert
Published: September 2020

Complex quantum networks are vital for quantum technologies. Entanglement based networks are the most versatile in terms of supported applications (including beyond just quantum communication). Here we present an 8 user city wide entanglement network.
Optical Data Stream Wavelength Conversion by a Dual-Active-Cavity Silicon Microring Wavelength Converter
Authors: Gevorgyan Hayk , Khilo Anatol , Popović Miloš A.
Published: September 2020

Data wavelength conversion is demonstrated in coupled active silicon microring resonators with push-pull cavity modulation. A 4 Gbps NRZ signal is up/down-converted by 24GHz and 56GHz with respective conversion efficiencies of -13 and -18 dB.
High-efficiency photo detection at 2 µm realized by GeSn/Ge multiple-quantum-well photodetectors with photon-trapping microstructure
Authors: Zhou Hao , Xu Shengqiang , Lin Yiding , Huang Yi-Chiau , Son Bongkwon , Li Wei , Guo Xin , Liu Lin , Lee Kwang Hong , Gong Xiao , Tan Chuan Seng
Published: September 2020

Photon-trapping microstructure was designed and incorporated into GeSn/Ge multiple-quantum-well photodetectors to enhance the optical absorption. A four times higher responsivity of 0.11 A/W was achieved at a wavelength of 2 μm.
Mid-infrared interband cascade LEDs emitting >5 mW of output power
Authors: Schäfer Nicolas , Scheuermann Julian , Weih Robert , Koeth Johannes , Höfling Sven
Published: September 2020

We present ICLEDs emitting at peak wavelengths of around 3.7 µm. A record efficiency was achieved by growing the epitaxial structures on low doped substrates and positioning the active stages at antinodes of the optical field.
Monolithically Integrated Resonant Cavity Enhanced Type-II Superlattice Detectors
Authors: Nordin Leland , Kamboj Abhilasha , Petluru Priyanka , Yoon Narae , Wasserman Daniel
Published: September 2020

We demonstrate all-epitaxial resonant cavity-enhanced type-II superlattice detectors (T2SL). Our structures show peak quantum efficiencies of 43-59%, which is a 4.0-6.6x enhancement compared to our control structures and greater than state-of-the-art long-wavelength infrared T2SL detectors.
Ge-on-Si Waveguide Polarization Rotator Operating in the 8-14 µm Atmospheric Transmission Window
Authors: Gallacher Kevin , Millar Ross W. , Griškevičiūte Ugne , Sinclair Martin , Sorel Marc , Baldassarre Leonetta , Ortolani Michele , Soref Richard , Paul Douglas J.
Published: September 2020

An ultra-broadband Ge-on-Si waveguide polarization rotator is experimentally demonstrated with a polarization extinction ratio of ≥ 15 dB over a 2 µm bandwidth (9-11µm wavelength) with an insertion loss of ≤ 1 dB.
Deep Learning for Multi-Step Performance Prediction in Operational Optical Networks
Authors: Mezni Ameni , Charlton Douglas W. , Tremblay Christine , Desrosiers Christian
Published: September 2020

We propose a 1D Convolutional Neural Network to predict the performance of a lightpath using field bit error rate data and we evaluate the model robustness over forecast horizons up to 24 hours.
High Gain-Bandwidth Waveguide Coupled Silicon Germanium Avalanche Photodiode
Authors: Carpentier Olivier , Samani Alireza , Jacques Maxime , El-Fiky Eslam , Alam Md Samuil , Wang Yun , Koh Ping-Chiek , Calvo Nicolas Abadia , Plant David
Published: September 2020

We present the DC, small signal and large signal performance of low excess-noise waveguide coupled germanium-on-silicon avalanche photodetectors with over 400 GHz gain-bandwidth product.
Silicon Photonic WDM-Polarization Receiver with Automated Feedback Control
Authors: Ma Minglei , Shoman Hossam , Shekhar Sudip , Jaeger Nicolas A. F. , Chrostowski Lukas
Published: September 2020

We demonstrate a silicon photonic, two-channel, tunable WDM-polarization receiver with automated polarization and wavelength control. Using a gradient descent-based control algorithm, we realize automated polarization adaptation and wavelength sta-bilization for two arbitrarily polarized inputs.
Physically secure image transfer using synchronized chaos between silicon optomechanical cavities
Authors: Wu Jiagui , Flor Flores Jaime G. , Shidla Derek , Yang Jinghui , Shi Binglei , Yu Mingbin , Lo Guoqiang , Kwong Dim-Lee , Duan Shukai , Wong Chee Wei
Published: September 2020

We demonstrate physically-secured image transfer using dynamical chaos synchronization between silicon optomechanical nanocavities. Chaos masking and pass filtering effect and color image with error correction are all realized in the silicon chip-based synchronous chaos system.
Modified stochastic gradient algorithms for controlling coherent pulse stacking
Authors: Abuduweili Abulikemu , Yang Bowei , Zhang Zhigang
Published: September 2020

We demonstrate the modified stochastic gradient descent algorithms with incorporating exponential moving average filtering to control delay lines in coherent pulse stacking.
Yb-doped Large Mode Area Multicore Fiber Laser with a Fs-inscribed Fiber Bragg Grating
Authors: Alon Yair , Halstuch Aviran , Sidharthan Raghuraman , Yoo Seongwoo , Ishaaya Amiel A.
Published: September 2020

We inscribe a fiber Bragg grating in an Yb-doped multicore LMA fiber, and demonstrate efficient lasing with it in a fiber laser configuration. We obtain 51.8W output power with a 72% slope efficiency.
Development of Tm:Ho Co-doped Silica Fiber for High-power Operation at 2.1 μm
Authors: Nunez-Velazquez M. , Ramirez-Martinez N. J. , Sahu J. K.
Published: September 2020

We present Tm:Ho co-doped fibers with different thulium concentrations and Tm:Ho ratios for 2.1pm laser operation. Laser efficiency of 56% was achieved with 5.5wt% of thulium and 10:1 ratio of Tm:Ho when diode-pumped at 793nm.
Rotation rate measurements with a large area cold atom interferometer
Authors: Landragin A. , Altorio M. , Gautier R. , Sidorenkov L. A. , Geiger R.
Published: September 2020

We present a cold atom gyroscope based on the Sagnac effect for matter-wave with very large area of 11 cm2 with record sensitivity and preliminary study of the scaling factor.
Room Temperature Compact Terahertz Laser Tunable over 1 THz
Authors: Amirzhan Arman , Chevalier Paul , Wang Fan , Piccardo Marco , Johnson Steven G. , Everitt Henry O. , Capasso Federico
Published: September 2020

We demonstrate a new type of Terahertz Gas Laser pumped by a tunable solid-state laser. This laser has a wide tuning range and operates at room temperature with a high efficiency in a very compact design.
Generation of Continuously-Tunable, Narrowband THz Pulses from Phase-Locked Femtosecond Pulse Bursts
Authors: Stummer Vinzenz , Flöry Tobias , Kaksis Edgar , Pugzlys Audrius , Baltuska Andrius , Krizsan Gergö , Polonyi Gyula , Fülöp Jozsef
Published: September 2020

We demonstrate generation of continuously-tunable, narrowband THz pulses from phase- locked multi-millijoule femtosecond pulse bursts by optical rectification in a tilted-pulse-front setup. Experimental results indicate advances in both, femtosecond pulse burst and high-energy THz source technology.
Sub-Joule Single-Cycle Terahertz Pulse by Frequency Downshifting of a Picosecond 10 gm CO2 Laser Pulse in a Tailored Plasma Structure
Authors: Nie Zan , Pai Chih-Hao , Hua Jianfei , Lu Wei , Mori Warren B. , Joshi Chan
Published: September 2020

We propose a method of generating sub-joule single-cycle terahertz pulse tunable from 2-10 THz by using a picosecond 10 pm CO2 laser pulse based on frequency downshifting in a tailored plasma structure.
Optical synthesis by spectral translation
Authors: Black Jennifer A. , Yu Su-Peng , Streater Richelle , Stone Jordan R. , Lu Xiyuan , Moille Gregory , Srinivasan Kartik , Papp Scott B.
Published: September 2020

We present a technique for optical-frequency synthesis by four-wave-mixing spectral translation of a soliton microcomb in a second microresonator. We demonstrate broadly tunable translation by over 600 nm and explore parametric amplification of the microcomb.
Adjustable repetition rate Kerr frequency combs in an integrated silica microring
Authors: Xu Yiqing , Lin Yi , Nielsen Alexander U. , Hendry Ian , Coen Stéphane , Erkintalo Miro , Ma Huilian , Murdoch Stuart G.
Published: September 2020

We generate Kerr frequency combs in a synchronously-driven silica microring resonator. Driving at integer (and fractional) multiples of the cavity free-spectral-range, we obtain soliton microcombs with adjustable comb spacings between 3.2 and 19.2 GHz.
Dark-pulse Kerr combs in linearly coupled microring structures
Authors: Helgason Óskar B. , Ye Zhichao , Twayana Krishna , Andrekson Peter A. , Schroder Jochen
Published: September 2020

We demonstrate mode-locked dark-pulse Kerr comb formation in linearly coupled microresonators. The comb states are coherent and reproducible, and feature 36% conversion when pumped with 2.5 mW power.
Nonlinear Phase-Shift Cancellation in Dispersion-Shifted Fiber Transmission by All-Optical Back-Propagation
Authors: Kaminski P. M. , Ulvenberg J. B. T. , Schou C. K. , Ros F. Da , Clausen A. T. , Forchhammer S. , Oxenlnwe L. K. , Galili M.
Published: September 2020

We experimentally demonstrate an unrepeatered system with optical phase conjugation (OPC)-based receiver-side back-propagation. Dispersion-shifted fibers employed for transmission simplify the OPC symmetry requirements, leading up to 2.93-dB SNR gains for dual-polarization 16-QAM signals.
Improved nonlinearity compensation of OPC-aided EDFA- amplified transmission by enhanced dispersion mapping
Authors: Kaminski P.M. , Ros F. Da , Clausen A. T. , Forchhammer S. , Oxenlowe L.K. , Galili M.
Published: September 2020

We demonstrate enhanced system symmehy for OPC-based nonlinearity compensation through dispersion mapping and nonlinear phase-shift optimization. Transmission reach increases of 40% and 7% are achieved w.r.t. dispersion-managed links without and with OPC, respectively.
Noise statistics and its implications on optimal constellation shapes for channels with optical phase conjugation
Authors: Hansen Henrik Enggaard , Yankov Metodi P. , Kaminski Pawel M. , Ros Francesco Da , Oxenlowe Leif K. , Forchhammer Soren
Published: September 2020

Probabilistic shaping designed for AWGN channels used on dispersion-compensated channels with mid-link OPC results in shaping gains comparable to those of specialized shaping. Without OPC, specialized probabilistic shaping is required to achieve comparable gains.
All-Optical 2*2-Bit Multiplier at 40Gb/s Using Bidirectional Multichannel Four-Wave Mixing
Authors: Dong Wenchan , Chen Liao , Lei Lei , Yu Yu , Zhang Xinliang
Published: September 2020

We propose and experimentally demonstrate an all-optical 2*2-bit multiplier with neither adder nor shift register. Based on bidirectional multichannel four-wave mixing, output logic results of multiplier at 40 Gb/s are clearly identified and correct.
Recent Progress of Narrow Linewidth InP Tunable Lasers
Authors: Ishii Hiroyuki
Published: September 2020

Narrow linewidth tunable lasers have been developed as the digital coherent systems have been used in optical networks. In this paper, the state of the art in the tunable laser is reviewed.
Ultra-Narrow Linewidth Chip-Scale Heterogeneously Integrated Silicon/III-V Tunable Laser Pumped Si/Si3N4 SBS Laser
Authors: Brodnik Grant M. , Liu Songtao , Harrington Mark W. , Bose Debapam , Tran Minh A. , Huang Duanni , Guo Joel , Chang Lin , Morton Paul A. , Bowers John E. , Blumenthal Daniel J.
Published: September 2020

We demonstrate a chip-scale ultra-narrow-linewidth stimulated Brillouin scattering laser pumped by a narrow-linewidth, tunable silicon/III-V laser. Reduction of ~600x in fundamental linewidth (1.1kHz to 1.8Hz) and ~9x in integral linewidth (110kHz to 12kHz) is achieved.
Temperature stable, narrow linewidth heterogeneously integrated semiconductor laser with Si3N4 cavity
Authors: Xiang Chao , Jin Warren , Guo Joel , Peters Jonathan D. , Kennedy MJ , Selvidge Jennifer , Morton Paul A. , Bowers John E.
Published: September 2020

We demonstrate the first heterogeneously integrated laser with a Si3N4 external cavity. Through a multilayer heterogeneous integration with InP and Si, the laser shows narrow linewidth and high temperature stability expected from a Si3N4 cavity.
Exploring Integrated Photonics with Symmetry and Topology
Authors: Feng Liang
Published: September 2020

Quantum mechanics and photonics share mathematical equivalence. Exploring integrated photonics with symmetry and topology not only deepens fundamental understanding in quantum physics but also endows novel photonic functionality for optical communication and information technology.
Magneto-optical isolator and self-holding optical switch integrated with thin-film magnet
Authors: Murai Toshiya , Shoji Yuya , Nishiyama Nobuhiko , Mizumoto Tetsuya
Published: September 2020

Novel magneto-optical isolator and self-holding optical switch with an a-Si:H microring resonator are demonstrated. The devices are driven by the remanence of integrated thin-film magnet and, therefore, maintain their state without any power supply.
Slaving a Highly Multi-Mode Laser to an On-Chip Single Mode Microresonator
Authors: Antman Yair , Westreich Ohad , Gil-Molina Andres , Ji Xingchen , Gaeta Alexander L. , Lipson Michal
Published: September 2020

We demonstrate transverse and longitudinal modal collapse of a highly multi-mode Fabry-Perot laser coupled to a silicon-nitride resonator, via self-injection locking. We show coupling to single transverse mode with more than 50% efficiency and sub-MHz linewidth.
Quantum Dots Color Converters for microLEDs: Material Composite and Patterning Technology
Authors: Li Xinhao , Kundaliya Darshan , Tan Zheng Jie , Anc Maria , Fang Nicholas X.
Published: September 2020

We demonstrated high-resolution pixelated quantum dots (QDs)/thiol-ene photopolymer color converters patterned by projection lithography on microLEDs. The material composite and patterning technology enable high-efficiency, wide-gamut and low cross-talk color conversion compared to drop-cast QDs.
Unforeseen Applications of Rydberg Atom-Based Sensors: SI Traceability, Phase Detection, Musical Recording, and other Unique Applications
Authors: Holloway Christopher L. , Simons Matthew T. , Robinson Amy K. , Haddab Abdulaziz H. , Gordon Joshua A.
Published: September 2020

Great progress had been made in the use of Rydberg atoms to detect the amplitude, phase, and polarization of electric fields and modulated signals. This has led to several unforeseen applications, which are discussed here.
Supercontinuum Generation in Orientation-Patterned Gallium Phosphide
Authors: Rutkauskas Marius , Srivastava Anchit , Reid Derryck T.
Published: September 2020

A visible supercontinuum is produced in bulk orientation-patterned gallium phosphide from 100-MHz 1040-nm femtosecond pulses. High-order parametric gain near 550 nm, seeded by self-phase-modulated spectral sidebands, underpins this new and simple supercontinuum process.
Piezo-optomechanics in lithium niobate on silicon-on-insulator for microwave-to-optics transduction
Authors: Van Laer Raphael , Jiang Wentao , Patel Rishi N. , Sarabalis Christopher J. , Cleland Agnetta , McKenna Timothy P. , Wollack E. Alex , Arrangoiz-Arriola Patricio , Witmer Jeremy D. , Safavi-Naeini Amir H.
Published: September 2020

We demonstrate efficient p iezoelectricity a nd optomechanics in a hybrid platform combining thin-film l ithium n iobate w ith silicon-on- insulator. The devices establish an intriguing path towards low-energy classical and quantum transduction between microwaves and optics.
Tunable Bragg Grating Filters and Resonators in Lithium Niobate-on-Insulator Waveguides
Authors: Pohl David , Kaufmann Fabian , Escalé Marc Reig , Holzer Jannis , Grange Rachel
Published: September 2020

We present integrated uniform, phase-shifted and sampled Bragg gratings in lithium niobate-on-insulator. High extinction ratios of 35 dB at 1550 nm, quality factors of 3.4M04 and an electro-optic tuning efficiency of 14.6 pm/V are achieved.
LiNbO3/Si3N4-Bilayer Vertical Coupler for Integrated Photonics
Authors: Alam A. S. , Girardi M. , Caut A. , Larsson A. , Torres-Company V. , Galili M. , Ding Y. , Yvind K.
Published: September 2020

The design of a LiNbO3/Si3N4-bilayer vertical coupler is proposed based on adiabatic transition from a thick-Si3N4 strip waveguide to a LiNbO3/thin-Si3N4 striploaded hybrid waveguide having a gross coupling loss of ~0.08 dB.
Wide Field-of-View Flexible Wavelength Routing and Multicasting for Multi-user Bi-directional Indoor Optical Wireless Communications
Authors: Feng Feng , Sangwongngam Paramin , Faulkner Grahame , O’Brien Dominic
Published: September 2020

Between an SLM-based base station with ±30° FOV and 4 steering-mirror-based nomadic terminals with ±50° FOV, we demonstrate flexible wavelength routing and multicasting with bi-directional optical wireless transmissions at 25 Gb/s over 4 metres.
PS-64QAM-OFDM THz Photonic-Wireless Transmission with 2×300 Gbit/s Line Rate
Authors: Jia Shi , Zhang Lu , Wang Shiwei , Li Wei , Qiao Mengyao , Lu Zijie , Ideer Nazar , Pang Xiaodan , Hu Hao , Oxenluwe Leif K. , Yu Xianbin
Published: September 2020

THz photonic-wireless transmission of a record 612.65 Gbit/s line rate is successfully demonstrated in the 320-380-GHz band by employing THz orthogonal polarization dual-antenna, PS-64QAM-OFDM modulation and advanced nonlinear-digital reception techniques.
Photonic crystal lasers grown on CMOS-compatible on-axis Si(001)
Authors: Taojie Zhou , Tang Mingchu , Chen Siming , Liu Huiyun , Zhang Zhaoyu
Published: September 2020

Semiconductor photonic crystal (PC) lasers are regarded as promising ultra-compact light sources with ultra-low energy consumption. Here, we demonstrate PC lasers monolithically grown on CMOS-compatible on-axis Si (001) substrate with an ultra-low threshold of ^0.6 μ W.
Scan-less Full-field Fluorescence Lifetime Imaging by 2D Spectral Encoding and Dual-Comb Heterodyne-Beating
Authors: Mizuno Takahiko , Hase Eiji , Minamikawa Takeo , Yamamoto Hirotsugu , Yasui Takeshi
Published: September 2020

Fluorescence lifetime imaging microscopy (FLIM) is useful for life science; however, mechanical scanning of focal point hampers rapid imaging. In this article, we demonstrated scanless full-filed FLIM imaging by 2D spectral encoding and dual-comb heterodyne-beating. OCIS codes: (170.3650) Lifetime-based sensing; (180.2520) Fluorescence microscopy, (300.6280) Spectroscopy, fluorescence and luminescence; (300.6320) Spectroscopy, high-resolution.
Graphene-silicon nitride photodetector with bound state in the continuum
Authors: Wang Yi , Yu Zejie , Sun Beilei , Tong Yeyu , Xu Jian-Bin , Sun Xiankai , Tsang Hon Ki
Published: September 2020

We introduce a new approach for fully planar integration of graphene on silicon nitride channel guiding of light based on bound states in the continuum. The graphene photodetector has 37 GHz bandwidth and 1 A/W responsivity.
Silicon nitride waveguide as a power delivery component for dielectric laser accelerators
Authors: Zhao Zhexin , Tan Si , Urbanek Karel , Hughes Tyler , Lee Yun Jo , Fan Shanhui , Harris James S. , Byer Robert L.
Published: September 2020

We study the weakly-guided silicon nitride waveguide to deliver sub picosecond high power laser pulses for dielectric laser accelerators. Damage limited deliverable fluence (0.19 J/cm2) is measured and nonlinear effects are characterized.
1.4 Million Q-Factor 780 nm Wavelength Si3N4 Micro-rings for Chip-Scale Atomic Systems
Authors: Sinclair Martin , Gallacher Kevin , Sorel Marc , Bayley Joseph C. , McBrearty Euan , Millar Ross W. , Hild Stefan , Paul Douglas J.
Published: September 2020

A silicon nitride micro-ring resonator with loaded Q factor of 1.4 million at 780 nm wavelength on silicon substrates for chip-scale atomic systems targeting the 87Rb atomic transition at 780.24 nm.
Dynamic Skew Measurements in a Deployed 4-Core Fiber
Authors: Puttnam B. J. , Luis R. S. , Rademacher G. , Marotta A. , Antonelli C. , Mecozzi A. , Graziosi F. , Hayashi T. , Nakanishi T. , Awaji Y. , Furukawa H. , Wada N.
Published: September 2020

We measure inter-core skew in a deployed 4-core fiber, observing maximum variation of <1.5 ps on a 25.2 km link over a 48-hour period and static skew of 1.12 ns for 6.3 km span, both similar to measurements in spooled fibers.
Spatially Multiplexed Picosecond Pulse-Train Generations in a Multimode Fiber
Authors: Zhang H. , Bigot-Astruc M. , Sillard P. , Fatome J.
Published: September 2020

We experimentally demonstrate the spatially multiplexed picosecond pulse-train generations based on the intramodal multiple four-wave mixings in a km-long graded-index multimode fiber.
20 W, 2.0 mJ, sub-ps deep-ultraviolet laser at 258 nm
Authors: Liu Kun , Qu Shizhen , Li Hao , Wang Qi Jie , Zhang Ying
Published: September 2020

We report a 20W, 2.0mJ, 10kHz deep-ultraviolet laser at 258nm with a pulse duration of 665fs. To the best of our knowledge, this is the highest-power sub-ps 258nm solid-state laser reported to date.
Camera-Based Modal Fingerprinting of Cavity Resonances in a Photonic Crystal Nanobeam
Authors: Afzal Francis O. , Petrin Joshua M. , Weiss Sharon M.
Published: September 2020

Utilizing distinct features in the leaky region of k-space as ‘modal fingerprints’, we demonstrate resonant mode identification in a photonic crystal nanobeam via infrared camera measurements with a ~19dB detection SNR improvement over transmission measurements.
Long Range Valley Hall Effect in WS2 Bloch Surface Wave Exciton Polaritons
Authors: Khatoniar Mandeep , Chakraborty Biswanath , Yama Nicholas , Menon Vinod
Published: September 2020

We demonstrate valley dependent long-range propagation features in a polariton fluid formed via coupling WS2 excitons to Bloch surface waves at room temperatures.
Periodic Surface Functional Group Density on Graphene Induced by Pulsed Laser Patterning of SiO2/Si Substrate
Authors: Mirza Inam , Drogowska Karolina Anna , Rodriguez Alvaro , Kovaricek Petr , Sladek Juraj , Derrien Thibault J.-Y. , Gedvilas Mindaugas , Raciukaitis Gediminas , Bulgakova Nadezhda , Kalbac Martin
Published: September 2020

The periodic functionalization of graphene has been achieved by pulsed laser substrate patterning. Laser-induced ripples formed at Si/SiO2 interface periodically modulate the reactivity of the monolayer graphene via modulation of the doping density.
Observation of Nanoscale Opto-Mechanical Molecular Damping; Origin of Spectroscopic Contrast in Infrared Photo Induced Force Microscopy
Authors: Almajhadi Mohammad A. , Uddin Syed Mohammad Ashab , Wickramasinghe H. Kumar
Published: September 2020

The contrast mechanism of infrared photoinduced force microscopy (IR-PiFM) for recording vibrational resonances is experimentally investigated. We show that spectroscopic contrast in IR-PiFM is mediated by opto-mechanical damping of the cantilever oscillation.