bluuebunny/crossref_metadata_2025 huggingface dataset:
Conservation of spatiotemporal orbital angular momentum of light in second-harmonic generation
Authors: Gui Guan , Brooks Nathan J. , Kapteyn Henry C. , Murnane Margaret M. , Liao Chen-Ting
Published: August 2021

By generating the second-harmonic of spatiotemporal orbital angular momentum light, conservation of transverse orbital angular momentum is observed, while the topology of such second-harmonic pulses can be modified by complex spatiotemporal astigmatism.
Coherent Excitation of Hexagonal Boron Nitride Single Photon Emitters via Optical Repumping
Authors: White Simon J.U. , Duong Ngoc My Hanh , Solntsev Alexander S. , Kim Je-Hyung , Kianinia Mehran , Aharonovich Igor
Published: August 2021

Coherent excitation of quantum emitters in hexagonal boron nitride is inhibited by electron decay into intermediate dark states or spectral diffusion. We present an optical co-excitation scheme to reduce these transitions and amplify the photoluminescence.
Manipulation of Exciton Dynamics and Annihilation in Single-Layer WSe2 using a Toroidal Dielectric Metasurface
Authors: Yuan Long , Jeong Jeeyoon , Kwock Kevin W. C. , Luk Ting S. , Schuck P. James , Yanev Emanuil S. , Hone James C. , Yarotski Dmitry A. , Brener Igal , Prasankumar Rohit P.
Published: August 2021

We control the exciton dynamics and annihilation in single-layer WSe2 coupled with a dielectric metasurface by tailoring the spectral overlap of excitonic and toroidal resonances.
Propagation-induced radiation limits in 3D Dirac semimetal high harmonic generation
Authors: Lim Jeremy , Ang Yee Sin , Ang Lay Kee , Wong Liang Jie
Published: August 2021

We show that terahertz pulse propagation in 3D Dirac semimetals induces a phase shift in the nonlinear current, leading to destructive interference in the radiated harmonics and an optimal thickness for high harmonic generation.
Highly efficient terahertz generation using 3D Dirac semimetal Cd3As2
Authors: Wang Lu , Lim Jeremy , Wong Liang Jie
Published: August 2021

We present Cd3As2 as a promising candidate for terahertz generation by lever-aging its significant third-order optical nonlinearity. We predict an efficiency over 5000 times that of LiNbO3 in a propagation distance of 300 nm.
Massively-parallel Amplitude-Only Fourier Optical Convolutional Neural Network
Authors: Miscuglio Mario , Hu Zibo , Li Shurui , George Jonathan K. , Capanna Roberto , Dalir Hamed , Bardet Philippe M. , Gupta Puneet , Sorger Volker J.
Published: August 2021

Here we introduce a novel amplitude-only Fourier-optical processor paradigm and demonstrate a prototype system capable of processing large-scale ~(2,000x1,000) matrices in a single time-step and 100 microsecond-short latency, for accelerating machine-learning applications.
High temperature reliable epitaxially grown quantum dot lasers on (001) Si with record performance
Authors: Shang Chen , Hughes Eamonn , Wan Yating , Dumont Mario , Koscica Rosalyn , Selvidge Jennifer , Herrick Robert , Gossard Arthur C. , Mukherjee Kunal , Bowers John E.
Published: August 2021

We report a novel solution to the high temperature reliability of InAs quantum dot lasers grown on (001) Si. Negligible degradation was observed after 1800 h aging, giving an extrapolated lifetime of two million hours.
A high-speed micro-ring modulator for next generation energy-efficient optical networks beyond 100 Gbaud
Authors: Sakib Meer , Liao Peicheng , Ma Chaoxuan , Kumar Ranjeet , Huang Duanni , Su Guan-Lin , Wu Xinru , Fathololoumi Saeed , Rong Haisheng
Published: August 2021

We demonstrate a silicon micro-ring modulator supporting 128 Gb/s NRZ modulation with SNR=5.2, ER=3.8dB, 0.8 Vpp drive swing, and 5.3 fJ/bit power consumption. We have also achieved 192 Gb/s PAM-4 modulation with TDECQ of 2.5dB.
Magnetic-free Nitride Optical Isolator on Chip
Authors: Tian Hao , Liu Junqiu , Siddharth Anat , Wang Rui Ning , Blesin Terence , He Jijun , Kippenberg Tobias J. , Bhave Sunil A.
Published: August 2021

We demonstrated a magnetic-free optical isolator for Si3N4 photonics using A1N piezoelectric actuators. Maximum of 10 dB isolation and <1 dB insertion loss is achieved under 100 mW RF power applied at each actuator.
Dual-layer thick LPCVD SiN waveguides for low-loss photonics on 200 mm wafers
Authors: Marinins A. , Kjellman J. , Caer C. , David T. , Rottenberg X. , Jansen R. , Soussan P.
Published: August 2021

We demonstrate 800 nm thick low-loss dual-layer LPCVD SiN optical waveguides with tunable profile shape to engineer modal properties. We achieved <10 dB/m loss at 1550 nm wavelength and nearly lossless vertical transitions between waveguides.
Impact of Stoichiometric Silicon Nitride Growth Conditions on Dispersion and Broadband Kerr Microcombs in the Near-Visible
Authors: Moille Gregory , Westly Daron , Perez Edgar F. , Rao Ashutosh , Lu Xiyuan , Srinivasan Kartik
Published: August 2021

We consider the impact of precursor gas ratio on nominally stoichiometric silicon nitride films, and show how it has a significant impact on microresonator integrated dispersion and broadband comb generation in the near-visible.
Modified Widely Linear Filter for Simultaneous Multi-impairment Compensation
Authors: Yadav Rekha , Venkatasubramani Lakshmi Narayanan , Koilpillai R. David , Venkitesh Deepa
Published: August 2021

We present a modified widely l inear single-tap blind equalizer for the joint multi-impairment compensation of polarization mixing, IQ Imbalance and transceiver phase noise, analyze its performance through simulation and experiments for 32Gbaud PM-16QAM transmission.
Silicon Nitride Waveguide-Integrated Silicon Photodiodes for Blue Light
Authors: Lin Yiding , Yong Zheng , Luo Xianshu , Lo Patrick G.-Q. , Sacher Wesley D. , Poon Joyce K. S.
Published: August 2021

We demonstrate silicon nitride waveguide-integrated silicon lateral p-i-n photodiodes at λ=488nm. A 50-µm long device exhibits a dark current of 178pA at -5V, a responsivity of 0.31 ±0.01A/W, and an external quantum efficiency of ~78%.
On-chip online learning and inference for photonic pattern recognition
Authors: Marquez Bicky A. , Guo Zhimu , Morison Hugh , Shekhar Sudip , Chrostowski Lukas , Prucnal Paul , Shastri Bhavin J.
Published: August 2021

Recent investigations in neuromorphic photonics exploits photonics for neuron models. Here, we experimentally demonstrate a silicon photonic chip that can perform training and testing of a Hopfield network to reconstruct corrupted input patterns.
Highly Functional Dual-comb Spectroscopy for Versatile Physical Property Evaluation of Solid Samples
Authors: Adachi Takuto , Zhu Ruichen , Akiyama Seishiro , Asahara Akifumi , Odagiri Yusuke , Ishibashi Chikako , Hatano Satoshi , Minoshima Kaoru
Published: August 2021

We developed a technique for evaluating versatile physical properties of solid materials with polarization-sensitive dual-comb spectroscopy. Complex and dynamical optical responses of solid samples to external fields were successfully demonstrated in magneto-optic and electro-optic effects.
Ultrafast Modified Uni-Traveling Carrier Photodiode with 3-dB Bandwidth of 150 GHz
Authors: Chao Enfei , Xiong Bing , Sun Changzheng , Hao Zhibiao , Wang Jian , Wang Lai , Han Yanjun , Li Hongtao , Yu Jiadong , Luo Yi
Published: August 2021

Ultrafast modified uni-traveling carrier photodiodes are designed based on a comprehensive model. The 3-dB bandwidths of fabricated devices with 4.5- and 6.5-μm diameters are 150 GHz and 110 GHz, respectively, in agreement with our simulations.
Laser-induced fluorescence of ultrafast laser filament generated plasmas for standoff detection
Authors: Kautz Elizabeth J. , Yeak Jeremy , Phillips Mark C. , Harilal Sivanandan S.
Published: August 2021

Ultrafast laser filament produced plasmas are made at a standoff distance of ~ 10 m. The Al emission signal features are enhanced by resonant excitation employing a continuous-wave laser, and laser-induced fluorescence signals are measured. A comparison is made between the standoff signatures of LIBS and LIF emission.
Kilometer-range distributed acoustic sensing by time- expanded phase-sensitive time-domain reflectometry
Authors: Soriano-Amat Miguel , Martins Hugo F. , Costa Luis , Martin-Lopez Sonia , Gonzalez-Herraez Miguel , Fernández-Ruiz María R. , Durán Vicente
Published: August 2021

We demonstrate acoustic sensing over 1 km with 4-cm resolution, using megahertz detection bandwidth and a sampling rate of 40 Hz, by means of two electro-optic frequency combs with very dissimilar line spacing.
Topological Charge Mediated Raman Gain Modulation
Authors: Liu Xiao , Antikainen Aku , Ramachandran Siddharth
Published: August 2021

We demonstrate that conventional Raman gain spectra can be non-trivially modulated by the OAM that fiber modes carry. An attendant “phase-matching” condition allows Raman spectra shifts by ~8 THz and strength modulations by ~20 dB.
Chromatic dispersion properties of highly localized Anderson modes in random silica-air fiber
Authors: Gausmann Stefan , Hu Xiaowen , Lopez Jose Enrique Antonio , Correa Rodrigo Amezcua , Schülzgen Axel
Published: August 2021

We present in this work chromatic dispersion measurements of highly localized Anderson modes in silica-air fiber using white light interferometry and confirmed our experimental results with rigorous FEM simulations.
Light Guidance Based on Topological Confinement Yielding Fiber Mode Counts Exceeding 50
Authors: Ma Zelin , Kristensen Poul , Ramachandran Siddharth
Published: August 2021

We exploit a novel waveguiding regime that enables low-loss guidance for high angular momentum modes while avoiding coupling to other modes, yielding a 25-m long fiber propagating > 52 modes with purity > 19 dB.
Inter-Modal Forward Stimulated Brillouin Scattering and Non-Reciprocity in Standard Polarization Maintaining Fiber
Authors: Bashan Gil , Diamandi Hilel Hagai , London Yosef , Shemer Keren , Sharma Kavita , Zadok Avi
Published: August 2021

Inter-polarization forward stimulated Brillouin scattering is studied in standard, polarization maintaining fibers. The process is driven by two orthogonally polarized pump tones. The stimulated acoustic waves induce non-reciprocal polarization switching of optical probe fields.
High-precision and large-dynamic-range three-dimensional surface profilometry by comb-based time-of-flight detection
Authors: Na Yongjin , Ahn Changmin , Jeon Chan-Gi , Kim Jungwon
Published: August 2021

We demonstrate high-precision (~10-nm repeatability) and large-dynamic-range (120 dB dynamic-range with ~9-mm ambiguity range) three-dimensional surface profile imaging technique by combining an optical frequency comb, an electro-optic-sampling-based timing detector, and a fast beam scanner.
1.55-μm Si-Photonics-Based Heterogeneous Tunable Laser Integrated with Highly Stacked QD-RSOA
Authors: Matsumoto A. , Masuda W. , Akahane K. , Umezawa T. , Yamamoto N. , Kita T.
Published: August 2021

We demonstrated a Si-photonics-based heterogeneous tunable laser in the 1.55- µm- band with quantum dot reflective semiconductor optical amplifier. Relatively low threshold current could be achieved owing to high gain characteristic.
Intelligent Decision Support System (IDSS) to Optimize 2D Materials Detection Using Digital Image Processing and Deep Learning
Authors: Sanchez-Juarez Jesus , Granados-Baez Marissa , Aguilar-Lasserre Alberto A. , Cardenas Jaime
Published: August 2021

We develop intelligent algorithm to detect Monolayers of WSe2, MoS2 and h-BN autonomously using Digital Image Processing and Deep Learning with 100% accuracy, avoiding any additional characterization techniques such as photoluminescence or Raman.
Mid-Infrared Cross-Comb Spectroscopy using Sum-Frequency Sampling
Authors: Liu Mingchen , Gray Robert M. , Roy Arkadev , Marandi Alireza
Published: August 2021

We introduce the cross-comb spectroscopy scheme by sum-frequency sampling of a mid-infrared frequency comb using a near-IR comb with slightly shifted repetition rate. We experimentally demonstrate a 300-nm instantaneous comb-resolved measurement bandwidth around 4 µm.
Dual-Comb Spectroscopy with Frequency Modulation
Authors: Wang Zhenhai , Chao Xing , Huh Jeong Hyun , Vicentini Edoardo , Hänsch Theodor W. , Picqué Nathalie
Published: August 2021

Dual-comb spectroscopy with frequency modulation and synchronous lock-in detection over the entire spectral bandwidth of the combs is demonstrated with absorption and dispersion spectra of C2H2 in the 1.5 μm region.
Polarization controlled femtosecond laser induced birefringence in isotropic crystals
Authors: Lei Yuhao , Wang Huijun , Shayeganrad Gholamreza , Kazansky Peter G.
Published: August 2021

Polarization controlled birefringent modification by femtosecond laser writing in isotropic crystals is demonstrated. Multiplexed optical data storage with high density in bismuth germanate crystal can be achieved.
Second harmonic generation in a fiberized amorphous silicon metamaterial
Authors: Xu Jie , Plum Eric , Savinov Vassili , Zheludev Nikolay I.
Published: August 2021

Patterning of amorphous silicon with chevron grooves yields a metamaterial frequency converter with a resonant second harmonic conversion efficiency of ~10-11/W, exceeding the previously achieved value for silicon metamaterial by two orders of magnitude.
Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire
Authors: Mishra Jatadhari , McKenna Timothy P. , Ng Edwin , Stokowski Hubert S. , Jankowski Marc , Langrock Carsten , Heydari David , Mabuchi Hideo , Safavi-Naeini Amir H. , Fejer M. M.
Published: August 2021

We demonstrate frequency conversion in the mid-IR using periodically poled lithium niobate thin-film ridge waveguides on sapphire. These devices are characterized by measuring both the wavelength tuning and transfer functions vs. poling period for second-harmonic and difference-frequency generation. ∗These authors contributed equally to this work.
Complex Swift Hohenberg Equation (CSHE) Dissipative Soliton Fiber Laser
Authors: Khanolkar Ankita , Zang Yimin , Chong Andy
Published: August 2021

We report dissipative solitons of CSHE in a mode-locked fiber laser by employing a unique fiber filter which produces a fourth order spectral response. The laser generates moving, asymmetric pulses with a highly asymmetric spectrum.
Gigabit Indoor Free-Space Optical Communication Enhanced by Dynamic Beam Control
Authors: Trotter Cade , Liverman Spencer , Bouchard Luc , Bialek Hayden , Nguyen Thinh , Natarajan Arun , Wang Alan X.
Published: August 2021

We present an indoor free space, line-of-sight optical communication system with gigabit bandwidth using an ultra-low power VCSEL diode, which is enhanced by dynamic beam steering and beam shaping for rapid user acquisition.
Nonvolatile switching in In2Se3-silicon microring resonators
Authors: Li Tiantian , Wang Yong , Xing Huadan , Li Qiu , Wang Feifan , Soman Anishkumar , Law Stephanie , Gu Tingyi
Published: August 2021

We investigate the phase transition in molecular beam epitaxy grown crystalline In2Se3 and observed nonvolatile switching in hybrid integrated silicon photonic resonator.
Selective area heteroepitaxy of antiphase boundary free GaAs microridges on on-axis (001) Si for silicon photonics
Authors: Shi Bei , Song Bowen , Taylor Aidan A. , Suran Brunelli Simone T. , Klamkin Jonathan
Published: August 2021

Low defect density gallium arsenide microridges were selectively grown on patterned (001) silicon. Antiphase boundaries were eliminated by bending and self-annihilation, enabled by low temperature nucleation and subsequent growth temperature optimization.
Ultra-narrow Tunable Dip in the Brillouin Gain Spectrum of Spun Birefringent Fiber
Authors: Choksi Neel , Liu Yi , Ghasemi Rojina , Qian Li
Published: August 2021

We report a method of generating an ultra-narrow tunable spectral dip with a bandwidth of ∼ 1 MHz in a resonator-free arrangement by using stimulated Brillouin scattering in a spun birefringent fiber.
High-power, single-longitudinal-mode compound-ring thulium-doped fiber laser at 1.7 μm
Authors: Zhang Lu , Zhang Junxiang , Sheng Quan , Sun Shuai , Shi Chaodu , Fu Shijie , Bai Xiaolei , Shi Wei , Yao Jianquan
Published: August 2021

An efficient high-power single-frequency thulium-doped ring-cavity fiber laser operating at 1720 nm based on cascaded sub-ring cavities all-fiber structures has been proposed and experimentally demonstrated for the first time.
Broadband Adiabatic Couplers in Thin-Film Lithium Niobate On Insulator
Authors: Lin Yi-Xin , Younesi Mohammadreza , Chung Hung-Pin , Chiu Hua-Kung , Geiss Reinhard , Tseng Quan-Hsiang , Setzpfandt Frank , Pertsch Thomas , Chen Yen-Hung
Published: August 2021

We demonstrate broadband adiabatic couplers using lithium niobate on insulator (LNOI) waveguides with a footprint reduced by 98% relative to bulk LN devices. LNOI couplers with coupling efficiency >95% across telecom S-C-L bands are obtained.
Photonic-Chip-Based Femtosecond Pulse Generator
Authors: Yu Mengjie , Reimer Christian , Okawachi Yoshitomo , Kharel Prashanta , Shao Linbo , Zhu Di , Hu Yaowen , Gaeta Alexander L. , Zhang Mian , Lončar Marko
Published: August 2021

We realize an electro-optic time lens on a lithium niobate photonic chip. By temporally carving a continuous-wave single-frequency laser, we generate a flat-top comb spectrum with 10.5-nm bandwidth and a 30-GHz pulse train with 532-fs duration.
Electronic Fingerprint Spectroscopy
Authors: Bernhardt Birgitta
Published: August 2021

UV dual comb spectroscopy will enable broadband spectroscopic studies of photochemical reactions with an unparalleled relative resolution of up to 10-9. Experimental and simulated studies paving the way for ultraviolet dual comb spectroscopy have been performed.
Classically Entangled Vectorial Structured Light towards Multiple Degrees of Freedom and Higher Dimensions
Authors: Shen Yijie , Wang Zhaoyang , Yang Xilin , Nape Isaac , Naidoo Darryl , Fu Xing , Forbes Andrew
Published: August 2021

Vector beam with spin-orbital non-separable coupling acts as classically entangled state with two degrees of freedom, here we generalize the ray-wave structured vectorially structured light to create multi-degree-of-freedom control towards high-dimensional classical entanglement.
Temporal and Spatial Challenges for Electron Acceleration inside Dielectric Laser Accelerators in the Relativistic Regime
Authors: Cankaya Huseyin , Mayet Frank , Kuropka Willi , Mahnke Christoph , Vidoli Caterina , Genovese Luca , Lemery Francois , Burkart Florian , Schulz Sebastian , Lamb Thorsten , Titberidze Mikheil , Müller Jost , Aßmann Ralph , Hartl Ingmar , Kärtner Franz X.
Published: August 2021

We will discuss the temporal and spatial challenges for electron acceleration inside dielectric laser accelerators to demonstrate electron acceleration in the relativistic regime and show recent acceleration results in 100 MeV electron energy range.
A Photonic Heterodyne Synthesizer for Millimeter-wave Radar
Authors: Kittlaus Eric A. , Eliyahu Danny , Ganji Setareh , Williams Skip , Matsko Andrey B. , Cooper Ken B. , Forouhar Siamak
Published: August 2021

We demonstrate low-phase-noise microwave synthesis from 1-104 GHz through heterodyning of miniaturized external cavity lasers. This microwave-photonic synthesizer is used to enhance the performance of a 95 GHz frequency-modulated continuous-wave radar during outdoor tests.
Orbital Angular Momentum-dependent Phase Detection using Single-pixel Dual-comb Spectroscopy towards Versatile Manipulation of Optical Vortex Light-wave
Authors: Asahara Akifumi , Akiyama Seishiro , Adachi Takuto , Minoshima Kaoru
Published: August 2021

Single-pixel dual-comb spectroscopy is applied to demonstrate detection of phase spectra that depend on the OAM modes of optical vortices. The OAM-dependent phase monitoring method has a great potential as a versatile light-wave manipulation technique.
Experimental Demonstration of Remotely Controlled and Powered Optical Switching Based on Laser-Delivered Bias and Control Signals
Authors: Fallahpour Ahmad , Minoofar Amir , Alishahi Fatemeh , Zou Kaiheng , Idres Samer , Hashemi Hossein , Habif Jonathan , Tur Moshe , Willner Alan E.
Published: August 2021

We experimentally demonstrate a remotely controlled and powered optical switch. The data channel, switching control signal and bias power are wavelength multiplexed and transmitted through 7.66 km SMF to the remote switch. We transmit a 20 Gbaud QPSK signal that is switched at 2 Mb/s rate.
Monolithically Integrated Electronic-Photonic Ultrasound Receiver Using Microring Resonator
Authors: Zarkos Panagiotis , Buchbinder Sidney , Adamopoulos Christos , Hsu Olivia , Madhvapathy Sarika , Whinnery Jake , Bhargava Pavan , Stojanović Vladimir
Published: August 2021

The first optical ultrasound sensor with co-integrated read-out circuitry is presented. Based on a micro-ring resonator (MRR), it has a measured 7.3mV/kPa sensitivity, 480Pa minimum detectable pressure, operating at 80% fractional bandwidth around 5MHz.
Ultracompact Optics-Free Chip-Scale Spectrometer with Integrated LEDs
Authors: Sarwar Tuba , Kim Juhyeon , Cheekati Srinivasa , Ku Pei-Cheng
Published: August 2021

We report the design of an optics-free, ultra-thin chip-scale optical spectrometer with monolithically integrated GaN light-emitting diodes that are suitable for reflectance or fluorescence spectroscopy.
Enumerative Sphere Shaping: Performance Analysis and Experimental Demonstration in DMT Systems
Authors: Chen Yizhao , Chen Junda , Wang Li , Tong Tianhao , Xiang Yating , Tang Ming , Liu Deming
Published: August 2021

We propose to apply ESS in DMT systems and find that it produces MB-like probability distributions over a large SNR range. Compared to CCDM, ESS with block length 100 achieves receiver sensitivity gain of 0.82 dB in 20-km SSMF transmission experiments at high shaping rates.
Chirp-like-Polyphase-Sequence based DCrT-S-ACO-OFDM for Bandwidth-limited Direct-detection Systems
Authors: Wang Chengqiang , Fan Zhaoquan , Zhao Jian
Published: August 2021

We propose a novel DCrT-S-ACO-OFDM based on chirp-like polyphase sequences. Experiments of a 34.4-Gbit/s direct-detection ACO-OFDM system under 10-GHz system bandwidth limitation show that the proposed scheme outperforms conventional ACO-OFDM, DFT-S-ACO-OFDM and OCT-precoded ACO-OFDM.
0.5-W Few-Cycle Frequency Comb at 4 μm from an Efficient Simulton-based Optical Parametric Oscillator
Authors: Liu Mingchen , Gray Robert M. , Roy Arkadev , Ingold Kirk A. , Sorokin Evgeni , Sorokina Irina , Schunemann Peter G. , Marandi Alireza
Published: August 2021

We report generation of three-cycle pulses at 4.18 μm with 565-mW average power, 900-nm instantaneous FWHM bandwidth, 350% slope efficiency, and 44% conversion efficiency, based on a half-harmonic optical parametric oscillator operating in simulton regime.
Performance Benefits Analysis of Low-loss Hollow Core Fibre in UWB Transmission Systems
Authors: Iqbal Md Asif , Parkin Neil , Lord Andrew
Published: August 2021

We analytically demonstrate the performance benefits of future low-loss HCF in long-haul, UWB (14THz in S+C+L-band) transmission compared with ultra-low-loss, large effective-area SMF using Gaussian noise (GN) model in the presence of ISRS.
RIN Penalty Analysis in G.654.E and G.652.D Fibres with Forward Pumped Distributed Raman Amplification
Authors: Hazarika Pratim , Iqbal Md Asif , Krzczanowicz Lukasz , Forysiak Wladek
Published: August 2021

Relative intensity noise induced penalties were measured in G.654.E and G.652.D forward-pumped distributed Raman amplifiers. Lower signal RIN was measured in G.654.E fibre, with single-span transmission showing a Q-factor improvement of > 2.5dB over G.652.D.
Analysis of Pump-to-Signal Noise Transfer in Multi-Stage OPCPA
Authors: Feng C. , Roides R. G. , Dorrer C. , Bromage J.
Published: August 2021

Pump-to-signal noise transfer in an ultra-broadband, single-laser‒pumped, two-stage nanosecond OPCPA was experimentally and numerically investigated. The dependence of signal-noise‒induced, pulse-contrast degradation on both pump-seed delay and amplifier operating regime was also studied.
Spatially Resolved Characterization of Partially Deuterated KDP Crystals for Parametric Amplification
Authors: Dorrer C. , Begishev I. A. , Bahk S.-W. , Bromage J.
Published: August 2021

Local phase-matching variations in partially deuterated KDP used for broadband optical parametric chirped-pulse amplification are spatially characterized using a beam-stabilized second-harmonic generation technique applicable to large-aperture crystals.
Towards Real-Time Hyperspectral Imaging in the Terahertz Range with THz Dual-Comb Sources
Authors: Khan Farid Ullah , Jerez Borja , de Dios Cristina , Criado Ángel Rubén , Acedo Pablo , Martín-Mateos Pedro
Published: August 2021

We present a novel technology for real-time hyperspectral imaging in the terahertz range based on the use of a dual-comb source that promises to revolutionize most of the performance characteristics of current terahertz imaging systems.
Absolute laser ranging with sub-µm resolution from a free-running dual-comb Yb:CaF2 laser
Authors: Nürnberg Jacob , Willenberg Benjamin , Phillips Christopher R. , Keller Ursula
Published: August 2021

We present absolute laser ranging with sub-µm resolution enabled by a free-running dual-comb diode-pumped Yb:CaF2 laser. At an update rate of 952 Hz, we achieve a relative resolution of more than 10-6 within the ambiguity range of 1.1 m.
Modular 3D-Printed Plasmonic Circuits for Signal Processing in THz Communications
Authors: Cao Yang , Nallappan Kathirvel , Guerboukha Hichem , Xu Guofu , Skorobogatiy Maksim
Published: August 2021

THz waveguide-based integrated solutions are of great utility in Terahertz communications. In this work, we propose a new type of modular 3D-printed micro-encapsulated two-wire plasmonic waveguide components to realize reconfigurable terahertz circuits for signal processing.
Sub-fs timing jitter of an 88 fs all-PM fiber integrated ultrafast Yb NALM oscillator
Authors: Ma Yuxuan , Salman Sarper , Li Chen , Mahnke Christoph , Hua Yi , Fellinger Jakob , Mayer Aline S. , Heckl Oliver H. , Heyl Christoph , Hartl Ingmar
Published: August 2021

We demonstrate an all-PM fiber integrated femtosecond Yb NALM oscillator with 88 fs compressed pulse duration and sub-fs free-running timing jitter [25 kHz to 5 MHz].
InGaAsP/InP Membrane Gain Sections for III-V/SiNx Heterogeneous Photonic Integration
Authors: Heidelberger Christopher , Santis Christos T. , Plant Jason J. , Morissette Erin M. , Kharas Dave , Swint Reuel B. , Yariv Amnon , Juodawlkis Paul W.
Published: August 2021

We present a fabrication process for 200 nm thick InGaAsP/InP membrane gain sections ( = 1550 nm) suitable for heterogeneous integration with SiNx PICs. The structures exhibit desired electrical performance and support lasing.
Low-loss Non-volatile Phase-change Integrated Photonics at 1550nm and 750nm
Authors: Fang Zhuoran , Zheng Jiajiu , Saxena Abhi , Whitehead James , Chen Yueyang , Majumdar Arka
Published: August 2021

The phase shifting effect and low loss of Sb2S3 are verified experimentally for the first time on SOI and SiN integrated photonics platform using microring resonators at the telecom C-band and near visible wavelengths.
Multi-pass post-compression of ultrashort laser pulses at extreme parameter scales
Authors: Hey Christoph M.
Published: August 2021

This talk provides a review of laser pulse post-compression leveraged by the advent of the multi-pass spectral broadening scheme, including perspectives on expanding the limits of pulse duration and energy.
Searching for Dark Matter with an Optomechanical Accelerometer
Authors: Manley Jack , Chowdhury Mitul Dey , Grin Daniel , Singh Swati , Wilson Dalziel
Published: August 2021

We show that a silicon nitride optomechanical membrane, acting as an accelerometer, can be used to search for dark matter.
Commissioning of a Highly Customized 1010 nm, ns-Pulsed, Yb-Doped Fiber Amplifier for On-Demand Single-Photon Generation
Authors: Mäusezahl Max , Christaller Florian , de Vries Oliver , Plötner Marco , Zhang Hao , Belz Annika , Heinrich Benjamin , Walbaum Till , Schreiber Thomas , Tünnermann Andreas , Kübler Harald , Löw Robert , Pfau Tilman
Published: August 2021

Parametric single-photon generation is a key technology for quantum-optical applications. Here we report on the development and commissioning of a highly specialized 1010 nm fiber amplifier for such a novel parametric single-photon source.
Centimeter-scale, Rigidly Held, Thermal Noise-Limited Optical Cavity for Mobile Applications
Authors: Kelleher Megan L. , Nakamura Takuma , Davila-Rodriguez Josue , McLemore Charles A. , Hendrie James P. , Diddams Scott. A. , Quinlan Franklyn
Published: August 2021

We present a rigidly held 6.3 mm-long, 6 mL-volume optical reference cavity. A laser stabilized to the cavity supports thermal noise-limited phase noise near -160 dBc/Hz at 1 kHz offset on a 10 GHz carrier.
Laser Cooling Using Metasurface-Enabled Beam Shaping
Authors: McGehee William R. , Zhu Wenqi , Barker Daniel S. , Westly Daron , Yulaev Alexander , Klimov Nikolai , Agrawal Amit , Eckel Stephen , Aksyuk Vladimir , McClelland Jabez J.
Published: August 2021

We present laser cooling of atomic Rb using a metasurface optic for beam shaping and polarization control. This technology will enable miniaturized quantum devices and calibration-free sensors utilizing the properties of cold atoms.
Residual Amplitude Modulation Reduction in Integrated Indium Phosphide Phase Modulators
Authors: Rosborough Victoria , Fridlander Joseph , Sang Fengqiao , Gambini Fabrizio , Brunelli Simone Tommaso Šuran , Chen Jeffrey R. , Kawa Stephan , Numata Kenji , Stephen Mark , Coldren Larry , Klamkin Jonathan
Published: August 2021

A novel indium phosphide Mach-Zehnder interferometer with directional couplers was realized to compensate residual amplitude modulation in integrated phase modulators. The change in transmission for π phase shift was reduced from 3.85 dB to 1.98 dB.
Monolithic Amorphous Hybrid Plasmonic Circuits
Authors: Lin Charles , Chang Po-Han , Su Yiwen , Helmy Amr S.
Published: August 2021

We experimentally demonstrated a versatile and amorphous-based plasmonic waveguide architecture, enabling micro-ring resonators with record Purcell factor of 81241, modulator with record <1 dB insertion loss, and photodetector with record –54 dBm sensitivity.
1.1 J Yb:YAG Picosecond Laser at 1 kHz Repetition Rate
Authors: Wang Yong , Chi Han , Baumgarten Cory , Dehne Kristian , Meadows Alexander R. , Davenport Aaron , Murray Gabe , Reagan Brendan A. , Menoni Carmen S. , Rocca Jorge J.
Published: August 2021

We demonstrate the generation of 1.1 J pulses with a duration of 4.5 ps at 1 kHz repetition rate (1.1 kW average power) from a diode-pumped cryo-cooled chirped pulse amplification Yb:YAG laser.
1 J/100 Hz cryogenically-cooled Yb:YAG laser amplifier with ink-cladding for the suppression of parasitic lasing
Authors: Kitajima Shotaro , Ogino Jumpei , Tokita Shigeki , Zhaoyang Li , Motokoshi Shinji , Morio Noboru , Tsubakimoto Koji , Yoshida Hidetsugu , Fujioka Kana , Ueda Ken-ichi , Kodama Ryosuke , Kawanaka Junji
Published: August 2021

A stable operation of 1.1 J/100 Hz 10 ns laser pulses were achieved from a single cryogenically cooled Yb:YAG rod amplifier with ink-cladding. The efficiency and gain coefficient were 44% and 383, respectively.
Nanocomposite-seeded Single-Domain Growth of Lithium Niobate Thin Films for Photonic Applications
Authors: Paldi Robynne L. , Aryal Arjun , Behzadirad Mahmoud , Busani Tito , Siddiqui Aleem , Wang Haiyan
Published: August 2021

Epitaxial single-domain LiNbO3 thin-films are realized using a novel nanocomposite seeding method. Full microstructure characterization and optical property measurement is conducted as a first step to demonstrate viability of this material for integrated photonics applications.
Photonic Crystal Optical Parametric Oscillator
Authors: Marty Gabriel , Combrié Sylvain , Raineri Fabrice , De Rossi Alfredo
Published: August 2021

A 20μm-long Photonic Crystal cavity has been engineered to achieve triply resonant parametric interaction at telecom wavelength and operate as an optical parametric oscillator. The pump power threshold is estimated to about 50 μW.
Telecom Wavelength Carbon Nanotube Emitter Integrated in Hybrid Photonic Crystal Cavity
Authors: Ovvyan Anna P. , Pyatkov Felix , Li Min-Ken , Gehring Helge , Beutel Fabian , Kumar Sandeep , Krupke Ralph , Pernice Wolfram H. P.
Published: August 2021

We developed hybrid graphene-Si3N4 cross-bar photonic crystal cavity devices, strengthening light interaction with the coupled carbon nanotube leading to generation of an enhanced electroluminescent signal in telecom wavelength band.
Lasing from TM mode photonic crystal nanobeam cavity
Authors: Ryu Tae-Sue , Ki Sang-Woo , Kim Hwi-Min , Lee Yong-Hee , Yang Jin-Kyu
Published: August 2021

We demonstrated lasing from TM modes in photonic nanobeam cavities. By varying the radius of air holes, Q-factor reaches around 1,000,000. The single-mode lasing action was performed at room temperature, and confirmed by numerical results.
First Order FBGs in InF3 Fibre Inscribed by Interferometry Technique and UV-fs-Laser
Authors: Chiamenti Ismael , Elsmann Tino , Reupert Aaron , Kara Oguzhan , Becker Martin , Wondraczek Lothar , Chernysheva Maria
Published: August 2021

First order FBGs were inscribed in InF3 fibre by UV-fs-laser and interferometry technique. The spectral quality and good thermal stability of the gratings will contribute to the development of Mid-IR all-fibre laser technology.
Platform for electrically reconfigurable ring resonator based on TMD-graphene composite waveguides
Authors: Datta Ipshita , Jimenez Gordillo Oscar A. , Chae Sang Hoon , Hone James , Lipson Michal
Published: August 2021

We show a platform for electrically tuning the degree of coupling in micro-ring resonators from the under-coupled to the over-coupled regime, based on graphene-TMD composite waveguides.
Gate-Controlled Schottky Heterojunctions Photodetector Based on Graphene-Silicon-Graphene
Authors: Qian Fengsong , Hu Liangchen , Wang Qiuhua , Sun Jie , Xie Yiyang , Xu Chen
Published: August 2021

We report a graphene-silicon-graphene-based photodetector with two opposite Schottky heterojunctions. Through the tuning of gate voltage, the device can obtain high photoconductivity gain and achieve excellent optical detection performance.
High responsivity GaAs photodiodes with self-embedded graphene quantum dots through one-step chemical etching
Authors: Huang Hsien-Chih , Namiki Shunya , Soares Julio , Wu Xihang , Kim Jeong Dong , Jiang Bill , Srikumar Vaanchit , Li Xiuling
Published: August 2021

GaAs photodiodes with self-embedded graphene quantum dots and antireflection texture are formed by one-step etching. An enhancement of photocurrent and photoresponsivity (9.31mA/W) by ~22X and ~25X, respectively, with respect to the planar counterpart is demonstrated.
Topology-controlled Polarized Photoluminescence from Rare-earth Doped Nanocrystals
Authors: Tripathi Aditya , Kruk Sergey , Shang Yunfei , Zhou Jiajia , Kravchenko Ivan , Jin Dayong , Kivshar Yuri
Published: August 2021

We show topology-controlled polarization of photoluminescence from rare-earth doped nanocrystals using disorder-immune zigzag arrays of dielectric nanoparticles. Topological control is verified by comparing emission from nanocrystals deposited on trivial and nontrivial arrays of nanoparticles.
Wide-Field Magnetic and Thermal Imaging of Electric Currents Using NV− Centers in Nanodiamond Ensembles
Authors: Dadras Siamak , Mukherjee Arunabh , Shayan Kamran , Tarduno John A. , Vamivakas A. Nick
Published: August 2021

Magnetic and thermal microscopy can be performed concurrently to probe physical performance of integrated circuits. We present wide-field imaging of current- induced magnetic and thermal patterns using optically-detected magnetic resonance of NV
−
centers in nanodiamond ensembles.
Enhanced Near Infrared (NIR) Luminescence of Bismuth-doped Phosphosilicate Fiber under Liquid Nitrogen Cooling
Authors: Zhao Qiancheng , Hao Qun , Yang Zongru , Qu Jiaqi , Peng Gang-Ding , Yu Changyuan
Published: August 2021

The spectral properties of Bi-doped phosphosilicate fiber has been investigated at liquid nitrogen temperature (LNT). It is observed that the NIR luminescence of phosphor-related bismuth active center (BAC-P) has been enhanced greatly at LNT.
Performance Impairments due to Inter-Core Crosstalk Dynamics in a 7-core MCF-based DMT-modulated Link
Authors: Gatto A. , Rapisarda M. , Parolari P. , Puttnam B. J. , Rademacher G. , Luís R. S. , Boffi P.
Published: August 2021

We investigate inter-core crosstalk impact on DMT-modulated signals in a 7-core fiber with different sources at the same nominal wavelength. We observe beating from relative laser frequency shift leads to time-dependent interference on DMT subcarriers.
Integrated gallium nitride microresonators for broadband Kerr comb generation
Authors: Zheng Yanzhen , Sun Changzheng , Xiong Bing , Wang Lai , Hao Zhibiao , Wang Jian , Han Yanjun , Li Hongtao , Yu Jiadong , Luo Yi
Published: August 2021

Dispersion engineered gallium nitride (GaN) microring resonators with quality factor exceeding 2 million are fabricated. Broadband Raman-Kerr combs are generated by taking advantage of this high Q GaN microresonator.
Synthetic Dimension Photonics on a Si CMOS Platform
Authors: Balčytis Armandas , Ozawa Tomoki , Ota Yasutomo , Iwamoto Satoshi , Maeda Jun , Baba Toshihiko
Published: August 2021

We present a dynamically modulated ring resonator on a Si CMOS platform, hosting a synthetic dimension lattice over 180 GHz. The frequency and time domain synthetic band structure was acquired and photonic transport phenomena were explored.
Ultra-low threshold quantum cascade laser
Authors: Wang Zhixin , Kapsalidis Filippos , Wang Ruijun , Beck Mattias , Scalari Giacomo , Faist Jérôme
Published: August 2021

We present a quantum cascade laser operating at 4.3 μm wavelength and exhibiting a threshold current of only 9.5 mA while generating a single-mode maximum power of 0.9 mW at -20 °C in continuous-wave operation.
Comb-locked telecom-grade tunable laser using a low-cost FPGA-based lockbox
Authors: Feng Zitong , Tourigny-Plante Alex , Vojtěch Josef , Genest Jérôme , Richardson David J. , Slavík Radan
Published: August 2021

We frequency locked a commercial ITLA (integrable-tunable-laser-assembly) laser to an optical frequency comb with arbitrary carrier frequency within the telecom L band (1570-1625 nm). We achieved long-term (days) frequency stability below ±1.5 Hz.
Low latency transmission in a hollow core fiber cable
Authors: Mangan Brian J. , Zhu Benyuan. , Puc Gabe S. , Kremp Tristan , Irid Mohandtahar.
Published: August 2021

We present the first field-deployed hollow core fiber (HCF) cable, demonstrating error-free transmission of direct-detection 10Gb/s DWDM signal over multi-km cascaded HCF cable link, enabling a 31% reduction in latency compared to a solid-core fiber.
Temperature-insensitive delay-line fiber interferometer
Authors: Shi Bo , Marra Giuseppe , Feng Zitong , Sakr Hesham , Hays John R. , Numkam Fokoua Eric R. , Poletti Francesco , Richardson David J. , Slavík Radan
Published: August 2021

We propose and demonstrate a Mach-Zehnder interferometer made of a combination of hollow core and standard fibers with over 1000 times smaller temperature sensitivity than interferometers made of standard fiber only.
Transfer Oscillator Technique for 10 GHz Generation with Ultra-Low Phase Noise < -100 dBc/Hz at 1 Hz offset
Authors: Nardelli Nicholas V. , Fortier Tara M. , Pomponio Marco , Baumann Esther , Nelson Craig , Schibli Thomas R. , Hati Archita
Published: August 2021

We generate 10 GHz microwave signals from an optical reference cavity using the transfer oscillator scheme with a free-running optical frequency comb. We demonstrate phase noise < -100 dBc/Hz at 1 Hz frequency offset from the carrier.
An ultralow phase noise 300 GHz wave based on optical frequency division via an integrated dissipative Kerr soliton comb
Authors: Tetsumoto Tomohiro , Nagatsuma Tadao , Fermann Martin E. , Navickaite Gabriele , Geiselmann Michael , Rolland Antoine
Published: August 2021

We demonstrate low phase noise 300 GHz wave generation through optical frequency division using an integrated dissipative Kerr soliton. The obtained phase noise at 10 kHz Fourier frequency, measured with a devised system, is -100 dBc/Hz.
2 μm all-fiber frequency comb providing single cycle pulses and a 2-octave spectrum
Authors: Xing Sida , Lesko Daniel M.B. , Lind Alexander J. , Diddams Scott A
Published: August 2021

We present a Tm:fiber frequency comb emitting 6.8 fs pulses centered at 1930 nm with 100 MHz repetition rate, 215 kW peak power and 374 mW average power. The output spectrum covers two octaves.
Non-line-of-sight imaging with picosecond optical-gated single photon detection
Authors: Zhu Shenyu , Sua Yong Meng , Rehain Patrick , Huang Yu-Ping
Published: August 2021

We demonstrated a non-line-of-sight imaging and tracking system with picosecond optical-gated single photon detection. It sees through obscureness while achiev-ing high resolution NLOS 3D imaging and position retrieval.
PAM4 Transmission Experiment and Scalability Simulations on Multi-wavelength Selective Crossbar Switch
Authors: Khope Akhilesh S. P. , Liu Songtao , Zhang Zeyu , Netherton Andrew M. , Hwang Rebecca L , Wissing Aaron , Perez Jesus , Tang Franklin , Schow Clint , Helkey Roger , Alferness Rod C. , Saleh Adel A. M. , Bowers John E.
Published: August 2021

We demonstrate a multi-wavelength selective crossbar switch with up to two wavelength switching capability per crosspoint. The switch has a mean path loss of 2.43 dB. We demonstrate an error free high speed PAM 4 transmission at 111.16 Gbps. We also report bounds on the port count of the switch.
InP Monolithically Integrated 1×8 Broadcast and Select Polarization Insensitive Switch for optical switching systems
Authors: Zali Aref Rasoulzadeh , Tessema Netsanet M. , Prifti Kristif , Kleijn Steven , Augustin Luc , Stabile Ripalta , Calabretta Nicola
Published: August 2021

For the first time we have designed and demonstrated polarization insensitive, high gain and broadband 1×8 broadcast and select switch suitable for optical packet switching system based on bulk SOAs integrated with passive elements.
Visible Spectrum Multicore Fibers with 10 and 16 Cores
Authors: Azadeh Saeed Sharif , Stalmashonak Andrei , Bennett Kevin W. , Chen Fu-Der , Sacher Wesley D. , Poon Joyce K. S.
Published: August 2021

We demonstrate 10- and 16-core multicore fibers with all cores operating in a single- mode with <0.06dB/m of loss in the visible spectrum. These fibers address emerging applications requiring spatial division multiplexing in the visible spectrum.
Turning nonlinearity from problem to advantage in ultrafast fiber amplifiers
Authors: Sidorenko Pavel , Wise Frank W.
Published: August 2021

We review the recent advances in fiber-based sources of ultrashort pulses based on the gain-managed nonlinear regime. We discuss how highly nonlinear pulse evolution can be exploited to overcome typical limits of fiber-based sources.
40 G III-V photodetectors on a monolithic InP/SOI platform
Authors: Xue Ying , Han Yu , Tong Yeyu , Yan Zhao , Wang Yi , Tsang Hon Ki , Lau Kei May
Published: August 2021

We report in-plane III-V p-i-n photodetectors selectively grown on (001) silicon-on- insulator (SOI) wafers. These devices feature a responsivity of around 0.7 A/W at 1550 nm and 1.8 A/W at 1310 nm, a low dark current of 6 nA at -1 V bias, and high-speed operation beyond 40 Gb/s.
A 30 Gb/s Monolithic Traveling-Wave Amplified Mach-Zehnder Modulator
Authors: Hosseinzadeh Navid , Schow Clint , Buckwalter James F.
Published: August 2021

A hybrid approach incorporates traveling-wave amplifier stages into the Mach- Zehnder modulator (MZM) to reduce the area and power and improve bandwidth in a 90-nm silicon photonic (SiPh) CMOS process. Optical measurements demonstrate data rates up to 30 Gb/s.
Sub-millimeter large high-speed photodetector for FSO communications
Authors: Umezawa Toshimasa , Nakajima Shinya , Matsumoto Atsushi , Akahane Kouichi , Yamamoto Naokatsu
Published: August 2021

We present a 0.4-mm-large high-speed photodetector (PD), formed by series and parallel connected integration of 40 m diameter PDs. We successfully achieved the same 3-dB bandwidth (8.5 GHz) as that in 40 m single PD.
Electric Field- Induced Reduction Dynamics of Graphene Oxide and its Photo-response
Authors: Saha Soma , Das Sonatan , Datta Anindya , Kundu Tapanendu
Published: August 2021

We demonstrate the reduction mechanism of graphene oxide (GO) using prism-based attenuated total reflection platform. The connection between the change in current and reflectance of GO film during reduction was studied along with device photo-response.
Subharmonic Synchronization of Soliton Microcomb Breathing Oscillations to Periodic Forces
Authors: Stone Jordan R. , Black Jennifer A. , Papp Scott B.
Published: August 2021

We show how soliton microcomb breathing oscillations synchronize to either the soliton repetition rate or to applied pump-laser phase modulation. In experiments, we observe locking ratios up to N = 8.
Zero-dispersion soliton generation in a high-Q fiber Fabry-Pérot microresonator
Authors: Xiao Zeyu , Li Tieying , Cai Minglu , Zhang Hongyi , Huang Yi , Wu Kan , Chen Jianping
Published: August 2021

The zero-dispersion soliton is generated in a fiber FP microresonator with a Q factor of 107. Its spectrum ranges from 1240 nm to 1700 nm with more than 6,286 comb lines in 40-dB power range.
Tracking chemical reaction using soft–X–Ray absorption spectroscopy with a table-top water-window X-ray source
Authors: Balciunas Tadas , Chang Yi-Ping , Yin Zhong , Schmidt Cédric , Zinchenko Kristina , Nunes Fernanda B. , Svoboda Vít , Smith Adam , Rossi Emanuele , Wolf Jean-Pierre , Wörner Hans Jakob
Published: August 2021

We demonstrate femtosecond time–resolved soft–X–ray absorption spectroscopy of liquid samples by combining a sub–micrometer–thin flat liquid jet with a high–harmonic table–top source covering the entire water-window range (284 - 538 eV). Our measurements temporally resolve the gradual appearance of absorption features below the carbon K-edge of ethanol and methanol during strong–field ionization, which trace the valence-shell ionization dynamics of the liquid alcohols with a temporal resolution of ~30 fs.
Coherently-Shaped Free Electrons as High-Resolution Probes of Coherence in Quantum Systems
Authors: Ruimy Ron , Gorlach Alexey , Mechel Chen , Rivera Nicholas , Kaminer Ido
Published: August 2021

We propose a novel technique that leverages free electrons coherently-shaped by laser pulses to measure quantum coherence in materials, opening the way toward the full characterization of the state of quantum systems at atomic-scale resolution.
Compact THz Photogun Transversely Pumped By Twin Single-Cycle Pulses
Authors: Kroh Tobias , Rohwer Timm , Dinter Hannes , Kellermeier Max , Fakhari Moein , Hemmer Michael , Demirbas Umit , Çankaya Huseyin , Pergament Mikhail , Aßmann Ralph , Matlis Nicholas H. , Kärtner Franz X.
Published: August 2021

A compact terahertz (THz) powered photogun reaching electron energies up to ~ 3keV is presented. First experiments testing the performance of the device as well as challenges in future development are summarized and discussed.
Demonstration of Near-field THz Spectroscopy Using Ultrafast Electron Microscopy
Authors: Yannai Michael , Dahan Raphael , Gorlach Alexey , Rivera Nicholas , Wang Kangpeng , Vanacore Giovanni Maria , Carbone Fabrizio , de Abajo Javier García , Kaminer Ido
Published: August 2021

We probe near-field THz pulses with nm-fs spatio-temporal resolution, through their interaction with free-electron pulses in an ultrafast transmission electron microscope. Our experiment can help understand THz generation and nanoscale THz phenomena.
Consequences of antenna effects on s-SNOM imaging of a photonic mode
Authors: Hannotte T. , Thomas L. , Santos C. Nascimento , Lavancier M. , Eliet S. , Walter B. , Faucher M. , Lampin J.-F. , Peretti R.
Published: August 2021

We report on the influence of antenna effects on the imaging by THz s-SNOM of a photonic mode. Unknown radiation pattern from the probe and sample combination makes the interpretation of a s-SNOM image non-trivial.