bluuebunny/crossref_metadata_2025 huggingface dataset:
Interferometric measurements of the focal velocity and effective pulse duration of an ultrafast ‘flying focus’
Authors: Pigeon J. J. , Franke P. , Chong M. Lim Pac , Katz J. , Boni R. , Dorrer C. , Palastro J. P. , Froula D. H.
Published: July 2023

An ultrabroadband ‘flying focus’ laser pulse was produced using an axiparabola and radially-stepped echelons. The focal velocities and effective temporal pulse durations were directly measured using spectral interferometry.
A Chirped Pulse Amplifier at 4.05 µm Based on Cryogenically Cooled Fe:ZnSe
Authors: Marra Z. Alphonse , Zhou Fangjie , Wu Yi , Chang Zenghu
Published: July 2023

A ~15-GW peak power, 1.1-W average power, mid-wave-infrared, femtosecond laser based on Fe:ZnSe and pumped by free-running Er:YAG lasers was demonstrated. 247-fs, 3.7-mJ pulses centered at 4.05 µm were produced at 300 Hz.
Influence of the laser-induced strain on the ultrafast magnetization dynamics of nickel
Authors: Kovalenko O. , Kim J.-W. , Vomir M.
Published: July 2023

The influence of the laser-induced quasi-static surface strain on magnetization dynamics has been revealed in a Nikel film. The temperature-dependent anisotropy and surface deformation lead to nonlinear variations of the magnetization precession phase and demagnetization time.
Deterministic Access of High-Power, Normal-GVD Kerr-Comb States
Authors: Sanyal Swarnava , Okawachi Yoshitomo , Zhao Yun , Kim Bok Young , McNulty Karl J. , Lipson Michal , Gaeta Alexander L.
Published: July 2023

We demonstrate a deterministic and repeatable pathway to access single and multi-free-spectral range states with normal-GVD Kerr combs. A key component to stabilizing the high-power comb states is implementation of a drop port on the auxiliary resonator.
Low-Noise Frequency Synthesis Based on Microcomb at a Few Gigahertz
Authors: Jia Kunpeng , Yi Xinwei , Wang Xiaohan , Liu Yunfeng , Liang Wei , Xie Zhenda , Zhu Shi-ning
Published: July 2023

We present soliton microcombs generation for low-noise optical frequency synthesis at a few gigahertz. The microcomb source is based on a monolithic fiber Fabry-Perot (FFP) resonator directly pumped by a distributed feedback (DFB) laser.
Rigorous coupled-wave analysis for the bound states in the continuum and the guided modes below the light cone
Authors: Song Alex. Y
Published: July 2023

We extend the rigorous coupled-wave analysis to the simulation of bound states in the continuum and the fully guided modes. This is achieved by using non-physical evanescent waves as input channels, analytic continuation of the scattering matrix to the full complex frequency plane, and analytic continuation of incident angles to complex numbers.
Resonance for analog recurrent neural network
Authors: Qu Yurui , Zhou Ming , Khoram Erfan , Yu Nanfang , Yu Zongfu
Published: July 2023

Resonance, as a ubiquitous feature across many wave systems, is a natural candidate for analog computing in temporal signals. We demonstrate that resonance can be used to construct stable and scalable recurrent neural networks. By including resonators with different lifetimes, the computing system develops both short-term and long-term memories simultaneously.
A Continuity Equation for the Flow of Fisher Information in Electromagnetic Scattering
Authors: Hüpfl Jakob , Russo Felix , Rachbauer Lukas M. , Bouchet Dorian , Lu Junjie , Kuhl Ulrich , Rotter Stefan
Published: July 2023

We demonstrate both theoretically and experimentally that one can define and measure the spatial flow of Fisher Information in electromagnetic scattering problems. This new information flow obeys a continuity equation in analogy to Poynting’s theorem.
Localization and isotropic gap formation in chip-scale Yukawa potential metastructures
Authors: Sarihan Murat Can , Govdeli Alperen , Lan Zhihao , Yilmaz Yildirim Batuhan , Erdil Mertcan , Aras Mehmet Sirin , Yanik Cenk , Panoiu Nicolae C. , Wong Chee Wei , Kocaman Serdar
Published: July 2023

Amorphous photonic structures generated using Yukawa-potentials are examined numerically and experimentally. Unique isotropic and asymmetric bandgaps are demonstrated. Urbach band tails are analyzed to prove Anderson-like localization in amorphous structures.
Witnessing Entangled Two-Photon Absorption via Quantum Interferometry
Authors: Martínez-Tapia Áulide , Corona-Aquino Samuel , Triana-Arango Freiman , You Chenglong , Jin Rui-Bo , Magaña-Loaiza Omar S. , Dong Shi-Hai , U’Ren Alfred B. , de J. León-Montiel Roberto
Published: July 2023

We demonstrate that a two-photon, N00N-state interferometer is insensitive to linear (single-photon) losses, and thus capable to unequivocally certify entangled two-photon absorption (eTPA) in arbitrary-sample transmission-based absorption measurements.
Optical Ramsey Spectroscopy on a Single Organic Molecule
Authors: Wang Yijun , Bushmakin Vladislav , Stein Guilherme , Schell Andreas W. , Gerhardt Ilja
Published: July 2023

We implement optical Ramsey spectroscopy to investigate the properties of single molecule coherence under cryogenic conditions. Our Ramsey method allows for research on a single molecule even under frequency-detuned conditions.
Tunable multicolor X-rays from free-electron-driven van der Waals heterostructures
Authors: Huang Sunchao , Duan Ruihuan , Pramanik Nikhil , Go Michael , Boothroyd Chris , Liu Zheng , Wong Liang Jie
Published: July 2023

We experimentally show that van der Waals heterostructures are a versatile platform for bespoke, multicolor, compact X-ray sources whose spectra can be tailored via atomic design.
Water Window Attosecond Pulses driven by Sub-cycle Tailored Waveforms
Authors: Silva-Toledo Miguel A. , Scheiba Fabian , Kubullek Maximilian , Mainz Roland E. , Rossi Giulio Maria , Kärtner Franz X.
Published: July 2023

Tunable high-harmonic continua in the water window spectral region are generated in helium using sub-cycle infrared waveforms from a parametric waveform synthesizer. Yield enhancement is observed with specific driving waveforms.
Coherent and incoherent trapped-ion quantum control in structured lightfields
Authors: Mehta Karan
Published: July 2023

Spatially structured lightfields enable enhanced laser cooling and quantum coherent control of trapped ions as compared to simple plane waves. Integrated photonics offers a route to stable delivery, facilitating application in quantum computing and metrology.
Lithium Niobite on Silicon High Speed Spatial Light Modulator
Authors: Trajtenberg-Mills Sivan , ElKabbash Mohamed , Brabec Cole , Panuski Christopher , Christen Ian , Englund Dirk
Published: July 2023

We present a device of thin film lithium niobite integrated on a CMOS backplane, enhanced by a high quality factor guided mode resonance. The device offers GHz speed and megapixel degrees-of-freedom spatial light modulation.
Adaptive Decision Threshold for Multipath Interference Impaired 40-Gb/s PAM4 IM/DD Optical Transmission
Authors: Li Yibin , Wei Zixian , Fu H. Y.
Published: July 2023

We proposed an adaptive decision threshold (ADT) scheme for PAM4 transmission system with multipath interference (MPI) noise, which obtains the signal-to-interference tolerance of beyond 4 dB for 40 Gb/s PAM4 signal for different laser linewidths.
Fully passive logic using 1-GHz in-fibre phase filters
Authors: Kaushal Saket , Rahim Aadhi Abdul , Roberge Anthony , Morandotti Roberto , Kashyap Raman , Azaña José
Published: July 2023

We report realization of an integrated (all-pass) phase-only filter with a record frequency resolution of 1 GHz (at least 10× improvement compared to a waveshaper) using Bragg grating technology in an all-fibre platform. The phase filter is utilized to realize high-speed fully-passive NOT and XNOR logic operations in a cm-long structure.
0.3 MW multicycle parametric source at 5.7 THz
Authors: Wu Ming-Hsiung , Huang Yen-Chieh
Published: July 2023

We report the generation of 0.3-MW coherent radiation at 5.7 THz internal to the silicon coupler of a Raman-suppressed KTP parametric amplifier. The radiation consists of ~500 oscillation cycles in 83-ps pulse width.
Coherent Temporal Stacking of Tens-of-fs Laser Pulses
Authors: Cooper Lauren , Du Qiang , Wang Dan , Whittlesey Mathew , Chen Siyun , Sapkota Deepak , van Tilborg Jeroen , Esarey Eric , Li Derun , Geddes Cameron , Wilcox Russell , Galvanauskas Almantas , Zhou Tong
Published: July 2023

We theoretically prove coherent pulse stacking can accommodate tens-of-fs pulse lengths when stacking large number of pulses. Experimental validation shows high-efficiency stacking of nine, 50fs bandwidth pulses with four Gires-Tournois Interferometric (GTI) cavities.
Microcomb-driven photonic convolutional engine
Authors: Bai Bowen , Yang Qipeng , Shu Haowen , Chang Lin , Wu Yichen , Yang Fenghe , Shen Bitao , Tao Zihan , Xie Weiqiang , Hu Weiwei , Bowers John E. , Wang Xingjun
Published: July 2023

We demonstrate a microcomb-driven chip-based photonic convolutional engine utilizing time-wavelength plane stretching approach. A preeminent photonic-core compute density of 1.04 TOPS/mm2 and a record high weight control precision of 9 bits are achieved.
‘Sawfish’ Spin-Photon Interface for Near-Unity Emitter-to-Waveguide Coupling
Authors: Bopp Julian M. , Plock Matthias , Turan Tim , Pieplow Gregor , Burger Sven , Schröder Tim
Published: July 2023

Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.
Near-Infrared Lab-on-a-Chip Optical Biosensor with Micro Ring Resonator and Fourier Transform Spectrometer on SOI platform
Authors: Yoo Kyoung Min , Fan Kang-Chieh , An Yue , Hlaing May , Jain Sourabh , Chen Ray T.
Published: July 2023

We demonstrated the design and experimental results of the near-infrared lab-on-a-chip optical biosensor platform that monolithically integrates the micro-ring-resonator and the on-chip spectrometer on the SOI wafer with the limit of detection of 0.042 RIU.
Tunable Sub-megahertz Optical Feature in a Resonator-free Twisted Gain Medium
Authors: Choksi Neel , Liu Yi , Li Qian Rojina Ghasemi
Published: July 2023

We use the interplay between polarization-dependent gain and frequency-dependent po-larization eigenmodes of a twisted (elliptically-birefringent) medium and demonstrate a tunable sub-megahertz optical feature at room temperature without resonators or loss.
Ultrastrong Spin–Photon Coupling in Gadolinium Gallium Garnet
Authors: Kritzell T. Elijah , Bao Junzhe , Doumani Jacques , Lee Jae Joon , Xu Hongjing , Tay Fuyang , Nojiri Hiroyuki , Bamba Motoaki , Baydin Andrey , Kono Junichiro
Published: July 2023

We examine ultrastrong coupling of an ensemble of paramagnetic spins in Gd3Ga5O12 with terahertz photons in the presence of a high external magnetic field both in the bulk and thin-film limits.
SiP based Hybrid Digital and Analog RoF mmWave 5G Transmission for Converged Optical Access Networks
Authors: Dass Devika , Venkatasubramani Lakshmi Narayanan , Barry Liam , Roeloffzen Chris , Browning Colm
Published: July 2023

We demonstrate hybrid optical-access by transmission of a signal constituting baseband PAM-8, 10GHz WiGig and 27GHz 5GNR waveforms over a 10km RoF link and observe lowest BER of 1.1×10-3(PAM-8) and EVMs of 6.5%(WiGig) and 5.1%(5GNR).
Secure OFDM-PON Bandwidth-limited System Precoded by Chaotic Frank Sequence-Based Circulant Matrix
Authors: Wang Geyang , Song Peiji , Pan Ying-yu , Chan Chun-Kit , Chen Lian-Kuan
Published: July 2023

We propose chaotic frank sequence-based circulant matrixes with ∼1088 key space. Encryption of 21.67-Gb/s-20km bandwidth-limited OFDM-PON has been experimentally demonstrated, which confirms the superior performance of the proposed scheme over the chaotic-DFT and chaotic-DHT.
Sub-30 fs Kerr-lens mode-locked Yb:SrLaAlO4 laser
Authors: Chen Weidong , Lin Zhang-Lang , Zeng Huang-Jun , Xue Wen-Ze , Zhang Ge , Pan Zhongben , Loiko Pavel , Mateos Xavier , Lin Haifeng , Wang Li , Petrov Valentin
Published: July 2023

We report on 25-fs soliton pulse generation from a Kerr-lens mode-locked Yb:SrLaAlO4 laser at 1090 nm with an average power of 149 mW at a pulse repetition rate of ~80 MHz.
Novel 1300 nm InP monolithic active/passive integration platform: application to widely tunable lasers
Authors: Hazan J. , Tondini S. , Andreou S. , Williams K.A. , Bente E.A.J.M.
Published: July 2023

We have realized an InP monolithically integration platform at 1300 nm with amplifiers, phase modulators and passive components. Single mode laser systems utilizing electro optic phase modulators with 30 nm tuning have been demonstrated.
Dual-pumped degenerate optical parametric oscillation in triple-state photonic molecules
Authors: Tomazio Nathalia B. , Fujii Laís , Trinchão Luca O. , Gonçalves Eduardo S. , Jarschel Paulo F. , Santos Felipe G. S. , Mayer Alegre Thiago P. , Barbosa Felippe A. , Wiederhecker Gustavo S.
Published: July 2023

We demonstrate degenerate optical parametric oscillation in a triple-state silicon nitride photonic molecule. DOPO is generated with a phase-coherent dual-tone pump scheme, and the phase-matching conditions are optimized by tuning the resonances with microheaters.
Efficient Intermodal Four-Wave Mixing in AlGaAs-on-Insulator Waveguide
Authors: Liu Yang , Ye Chaochao , Kim Chanju , Zheng Yi , Yvind Kresten , Oxenløwe Leif K. , Pu Minhao
Published: July 2023

We demonstrate cross-polarized four-wave mixing with a conversion efficiency of -31.5 dB in a 2.5-mm-long AlGaAs-on-insulator waveguide with 80-mW pumping. We report the highest effective nonlinearity (278 W-1m−1) for intermodal four-wave mixing in integrated waveguides.
Acoustic control of optical excitation of rare-earth ions
Authors: Ohta Ryuichi , Lelu Grégoire , Xu Xuejun , Inaba Tomohiro , Hitachi Kenichi , Taniyasu Yoshitaka , Sanada Haruki , Ishizawa Atsushi , Tawara Takehiko , Oguri Katsuya , Yamaguchi Hiroshi , Okamoto Hajime
Published: July 2023

We investigated phonon-assisted optical excitation of erbium ions using surface acoustic waves. The results will pave the way to on-chip control of the energy transduction between telecom-photons and long-lived electron spins.
Eight-channel EML array based on four phase-shifted sampled Bragg gratings
Authors: Sun Xiao , Sun Yiming , Ye Shengwei , Cheng Weiqing , Liang Song , Huang Yongguang , Xiong Jichuan , Liu Xuefeng , Marsh John H. , Hou Lianping
Published: July 2023

An eight-channel electroabsorption modulated DFB laser (EML) array with a 0.8 nm channel spacing is demonstrated experimentally. The EMLs have a 20 dB extinction ratio at 3.6 V electroabsorption modulator reverse voltage.
Towards Electrically-Pumped AlGaN UV-A Lasers with Transparent Tunnel Junctions
Authors: Ghosh Arnob , Xavier Agnes M. D. M. , Rahman Sheikh Ifatur , Allerman Andrew , Rajan Siddharth , Arafin Shamsul
Published: July 2023

Molecular beam epitaxy-grown GaN/AlGaN-based active regions were optimized by varying quantum-well widths to yield increased photoluminescence intensity at UV-A wavelengths. The optimized gain medium was then used in electrically-pumped laser structures with transparent tunnel junctions.
Active photonic molecules based on ring quantum cascade lasers
Authors: Letsou Theodore P. , Kazakov Dmitry , Opačak Nikola , Beiser Maximilian , Cin Sandro Dal , Schwarz Benedikt , Capasso Federico
Published: July 2023

Photonic molecules are the optical analog of chemical molecules: two or more strongly coupled optical resonators. Here, we present a new class of active photonic molecules based on ring quantum cascade lasers.
Enhancing terahertz quantum cascade laser emission by breaking the dipole approximation
Authors: Keidar Shaked , Sloan Jamison , Franckié Martin , Ottomaniello Andrea , Scalari Giacomo , Tredicucci Alessandro , Kurman Yaniv , Kaminer Ido
Published: July 2023

We show that transitions in quantum cascade lasers (QCLs) can achieve substantial beyond-dipole enhancements, which we quantify using macroscopic quantum electrodynamics for specially designed cavities and graphene waveguides.
Compact Low-loss S-bends Designed by CMA-ES
Authors: Miyatake Yuto , Toprasertpong Kasidit , Takagi Shinichi , Takenaka Mitsuru
Published: July 2023

Based on a design method by CMA-ES, we experimentally demonstrated an ultra-compact S-bend with an insertion loss of 0.011 dB, which is the lowest value in the footprint range smaller than around 30 μm2.
Broadband Optical Add-Drop Filters Enabled by Silicon Photonic Sub-wavelength-grating-assisted Waveguides
Authors: Hammood Mustafa , Yun Han , Chrostowski Lukas , Jaeger Nicolas A. F.
Published: July 2023

We present the design of silicon optical add-drop filters made using sub-wavelength-grating-assisted, contra-directional couplers. We demonstrate that such devices can have broad bandwidths, up to 45 nm, while maintaining low losses and high out-of-band isolations.
Tensorized Optical Multimodal Fusion Network
Authors: Zhao Yequan , Xiao Xian , Kurczveil Geza , Beausoleil Raymond G. , Zhang Zheng
Published: July 2023

We propose the first tensorized optical multimodal fusion network architecture with a self-attention mechanism and low-rank tensor fusion. Simulation results show 51.3× less hardware requirement and 3.7× 1013 MAC/J energy efficiency.
Hybrid Integration of Hook-shaped Traveling-wave Semiconductor Optical Amplifier and Taiji Ring Resonator for Unidirectional Lasing
Authors: Zeng Siwei , Zhao Xiaolei , Sweatt Lance , Porter Chas , Zhu Lin
Published: July 2023

We demonstrate a unidirectional ring hybrid diode laser based on integration of a hook-shaped traveling-wave semiconductor optical amplifier (SOA) and Taiji ring resonator. The additional crossover bending waveguide inside the silicon nitride Taiji ring introduces a nonreciprocal loss in the laser cavity while the gain is provided by a multiple depth etched hook-shaped SOA.
Shot-Noise-Limited Near-Ultraviolet Dual-Comb Spectroscopy
Authors: Xu Bingxin , Hänsch Theodor W. , Picqué Nathalie
Published: July 2023

Dual-comb spectroscopy is implemented in light-starved conditions at optical powers of a few tens of picowatts. Quantum-limited sensitivity is demonstrated for comb-line-resolved spectra of Doppler-broadened transitions in the ultraviolet 770-THz region.
Neural Networks for Fiber Amplifier Design Optimization using Experimental Training Sets
Authors: Rabbani Hamed , Jalilpiran Saber , LaRochelle Sophie , Rusch Leslie A.
Published: July 2023

We use a neural network trained from experimental cut-back measurements of a doped fiber. With fast, accurate predictions of noise figure and gain, we find optimal fiber length and pumping strategy for an amplified link.
Upper Pulse Energy Limit of Narrowband THz Generation
Authors: Green Natalie K. , Rader Claire , Nielson Megan F. , Johnson Jeremy A.
Published: July 2023

We generate tunable narrowband THz radiation using BNA bonded to sapphire in tandem with a chirp and delay technique. Using a Ti:Sapphire laser, we test the limits of intense THz generation (0.1 to 5 THz).
Burst-Mode Operation of Silicon Photonic Waveguide Integrated Germanium Avalanche Photodiodes
Authors: Sjaardema T. , Starbuck A. , Pomerene A. , Dallo C. , Trotter D. , Papen G. , Gehl M. , Lentine A.
Published: July 2023

We demonstrate the operation of a waveguide integrated germanium avalanche photodiode on silicon for use in a burst-mode receiver. We have shown this device has error-free operation over 1e8 bits for data at 10 Gb/s.
Pushing the Limits of Photonics in the Visible Spectrum
Authors: Corato-Zanarella Mateus , Ji Xingchen , Mohanty Aseema , Lipson Michal
Published: July 2023

We demonstrate an ultra-low loss (down to 3.62 dB/m) SiN platform for visible wavelengths where ultra-high Q (up to 2.07 x 107) microresonators probe the limits of absorption and scattering losses.
Silicon Nitride based photonic integrated circuit technology and integration opportunities
Authors: Selvaraja Shankar Kumar , Chatterjee Avijit , Sushma Gali , Rawat Pravin , P Venkatachalam , Singh Radhakant , V Neethu E
Published: July 2023

We present our work on silicon nitride(SiN) integrated devices and circuit development operating in the visible-to-infrared spectrum. Integration of SiN-on-SOI will be discussed along with Challenges and opportunities related to material and device integration.
Parametric Study of a Diode-Side-Pumped Bonded Laser Rod for Thermal Effects Reduction
Authors: Dubé Thomas , Meroni Cesare , Ménard Vivien , Benayad Abdelmjid , Brasse Gurvan , Braud Alain , Lupinski Dominique , Camy Patrice , Montant Sébastien
Published: July 2023

This present work outlines a parametric study of a diode side-pumped bonded laser rod. Both material combination and geometry of the samples are discussed using simulations and experiments to reduce the pump-induced thermal effects.
National eXtreme Ultrafast Science (NeXUS) user facility
Authors: Leshchenko Vyacheslav , Scarborough Timothy , Ronningen Theodore , Gupta Jay , Kawakami Roland , Allison Thomas , DiMauro Louis F. , Baker Robert
Published: July 2023

NeXUS is one of the NSF mid-scale facilities, which major mission is to make the cutting-edge attosecond technology available to the scientific community.
Thermally Induced Fracture of Laser Glass in High Average Power Gas-Cooled Laser Systems
Authors: Sistrunk E. , Batysta F. , Benge J. , Cebreros F. , Church A. , Galbraith J. , Galvin T. , Keebaugh D. , Koh E. , Kupfer R. , Lowell E. , Maranville W. , Mitchell S. , Peterson J. , Reagan B. , Sawyer L. , Schaffers K. , Tamer I. , Willard D. , Spinka T.
Published: July 2023

Laser glass fracture and cooling scalability in high average power gas-cooled laser amplifiers were studied by in-situ optical probing of laser glass during actual fracture events under realistic thermal load conditions.
Soliton order preservation for high-efficiency and broadly tunable self-frequency shift
Authors: Shamim Md Hosne Mobarok , Alamgir Imtiaz , Rochette Martin
Published: July 2023

We introduce soliton order preservation, a pumping mechanism that leads to soliton self-frequency shift with simultaneous high energy conversion efficiency (ECE) and broad tunability. We demonstrate tunable solitons over 180 nm while maintaining ECE>80%.
Unidirectional perfect reflection and radiation in double-lattice photonic crystals
Authors: Inoue Takuya , Noguchi Naoya , Yoshida Masahiro , Noda Susumu
Published: July 2023

We propose unique unidirectional phenomena in a double-lattice photonic-crystal waveguide, where perfect radiation can be achieved for light incident from one side, while perfect reflection can be achieved for light incident from the opposite side.
Non-hermitian Physics in a Heterogenous Photonic Molecule
Authors: Sharp David , Choi Minho , Nguyen Hao , Manna Arnab , Fröch Johannes , Cossairt Brandi , Majumdar Arka
Published: July 2023

Previous work in non-hermitian photonics focused on homogeneous photonic molecules. Here, heterogeneous photonic molecules of nanobeam cavity coupled to a ring resonator are studied. Non-hermitian physics will be explored by using colloidal nanoplatelets.
X-Ray-Driven Photon Bunching
Authors: Katznelson Shaul , Tziperman Offek , Bucher Tomer , Abudi Tom Lenkiewicz , Schuetz Roman , Be'er Orr , Levy Shai , Bekenstein Yehonadav , Roques-Carmes Charles , Kaminer Ido
Published: July 2023

We measure the second-order coherence function g(2) for X-ray-driven light emission (scintillation), observing that it is bunched (g(2) > 1), and can achieve extreme bunching values (g(2)~97) in perovskite nano-crystals.
Single Telecom Photons from a Diamond Silicon Vacancy Center via Quantum Frequency Conversion§
Authors: Bersin Eric , Sutula Madison , Wei Yan-Cheng , Assumpcao Daniel , Huan Yan Qi , Knall Erik , Knaut Can , Suleymanzade Aziza , Stas Pieter-Jan , Langrock Carsten , Sinclair Neil , Fejer M. M. , Hamilton Scott , Lončar Marko , Englund Dirk , Dixon P. Benjamin , Lukin Mikhail
Published: July 2023

We perform low noise conversion of single photons from a diamond silicon vacancy color center to the telecom O-band. We demonstrate preservation of the photonic quantum properties, enabling their usage in deployed quantum networking applications.
Integrated Quantum Memories at 1.3 K with Tin-Vacancy Centers and Photonic Circuits
Authors: Christen Ian , Raniwala Hamza , Chen Kevin C. , Colangelo Marco , De Santis Lorenzo , Errando-Herranz Carlos , Harris Isaac , Li Linsen , Song Yixuan , Medeiros Owen , Sutula Madison , Berggren Karl , Trusheim Matt , Englund Dirk , Ben Dixon P. , Zhang Xingyu , Starling David , Shtyrkova Katia , Kharas David , Murphy Ryan , Bersin Eric , Hamilton Scott
Published: July 2023

We present an efficient microwave and optical interface for quantum memories at 1.3 K based on tin-vacancy color centers in diamond and scalable integrated photonics.
Reconfigurable microresonators created by touching straight and bent optical fibers
Authors: Vassiliev V. , Sumetsky M.
Published: July 2023

We demonstrate a new type of reconfigurable high Q-factor optical whispering gallery mode microresonators created along the submillimeter coupling length of coplanar straight and bent optical fibers touching each other.
Single-Shot Carrier-Envelope Phase Detection in PHz Electronic Networks
Authors: Ritzkowsky Felix , Yeung Matthew , Bebeti Engjell , Gebert Thomas , Matsuyama Toru , Rossi Giulio M. , Mainz Roland E. , Cankaya Huseyin , Keathley Philip D. , Kartner Franz X.
Published: July 2023

We report single-shot detection of the carrier-envelope phase of few-cycle mid-infrared waveforms using petahertz electronic networks. Leveraging large-area networks, we demonstrate a charge amplitude of 2,500 electrons per shot, enabling the detection at the full laser repetition rate of 50 kHz.
Revealing the single-shot pulse evolution dynamics in a CW- seeded femtosecond optical parametric generator
Authors: Wang Jue , Cai Yu , Fan Jintao , Hu Minglie
Published: July 2023

We demonstrate for the first time the round-trip pulse evolutions dynamics in a CW- seeded femtosecond optical parametric generator utilizing the dispersive temporal interferometer technique.
Polarization Mapping of Backscattered THz Speckle Fields Using the PHASR Scanner
Authors: Xu Kuangyi , Harris Zachery B. , Arbab M. Hassan
Published: July 2023

We present a handheld polarization-sensitive imaging instrument to directly capture terahertz speckles in the back-scattering geometry. We demonstrated that the distribution of the polarization states are strongly dependent upon the surface roughness and the illumination frequency.
Dimension Reduction for Photonic Processing Using Tailored Disorder
Authors: Wendland Daniel , Becker Marlon , Bente Ivonne , Brückerhoff-Plückelmann Frank , Busch Kurt , Risse Benjamin , Pernice Wolfram H.P.
Published: July 2023

Integrated optical processing networks enable high computation speeds combined with low energy consumption. We present here a scheme for dimension reduction for optical neural networks, by orders of magnitudes, while still reaching high classification accuracies.
Broadband Tunable OPOs for FTIR Spectroscopy
Authors: Johnson Kerr , Castro-Marin Pablo , Farrell Carl , Kara Oguzhan , Davidson Ian A. , Fu Qiang , Jasion Greg T. , Wheeler Natalie V. , Poletti Francesco , Richardson David J. , Reid Derryck T.
Published: July 2023

Broadband, tunable optical parametric oscillators (OPOs) are shown to have great potential for improving a range of Fourier Transform Infrared (FTIR) spectroscopy applications. These include stand-off detection, fiber-delivery, multi-species spectroscopy, and high-resolution, high sensitivity measurements.
Large Aperture Full Color Meta-Optic Camera
Authors: Fröch Johannes E. , Tseng Ethan , Chakravarthula Praneeth , Colburn Shane , Zhan Alan , Heide Felix , Majumdar Arka
Published: July 2023

We demonstrate full color in the wild imaging with a 1 cm, f/2 aperture meta-optic, directly integrated with a camera. We use a computational end-to-end design approach to derive a suitable meta-optic, which in combination with a computational backend truthfully recovers visible full color image scenes.
Barium Titanate Electro-Optic Modulators for Silicon Photonics Grown by Off-Axis Sputtering
Authors: Posadas Agham , Reynaud Marc , Mashanovich Goran , Demkov Alexander A.
Published: July 2023

Barium titanate thin films with have been epitaxially integrated on silicon-on-insulator wafers. They exhibit excellent structural quality with effective Pockels coefficient >180 pm/V and intrinsic propagation loss <2 dB/cm. Hybrid waveguide modulators based on this material exhibit Vπ-length of 0.42 V-cm.
Gain Flattened Wideband YDFA for 1 µm Data Transmission
Authors: Huang Xin , Jung Yongmin , Liang Sijing , Richardson David J.
Published: July 2023

We report a wideband gain-flattened ytterbium-doped fiber amplifier operating at 1025-1075 nm in a dual-stage configuration. It provides a 20 dB average gain with <1 dB gain variation and a noise figure of <5.7 dB.
InAs/GaAs Quantum Dot Lasers on CMOS-Compatible (001) Silicon by MOCVD Direct Heteroepitaxy
Authors: Verrinder Paul , Wang Lei , Shi Bei , Zhu Si , Klamkin Jonathan
Published: July 2023

Quantum dot lasers have been demonstrated on CMOS-compatible (001) silicon by MOCVD direct heteroepitaxy. Lasers exhibit room temperature continuous-wave lasing with 46.8 mA threshold current and up to 16 mW single-facet output power.
CW-lasing 980 nm InGaAs/GaAs/GaAsP QW lasers monolithically grown on (001) Si
Authors: Lin Qi , Huang Jie , Lin Liying , Luo Wei , Gu Wen , Lau Kei May
Published: July 2023

We report continuous-wave (CW) lasing of electrically-pumped InGaAs/GaAs/GaAsP quantum well (QW) lasers grown on Si. The lowest threshold current is 40 mA, with an output power of 92.8 mW and maximum operating temperature of 95 °C.
1D Photonic-Crystal Laser with Laterally-Current-Injected Ultrasmall Buried Active Region on SiO2/Si Substrate
Authors: Tsurugaya Takuma , Takeda Koji , Fujii Takuro , Segawa Toru , Matsuo Shinji
Published: July 2023

One-dimensional photonic-crystal lasers with 2.5-μm-long buried active regions are fabricated on SiO2/Si substrate. The rib-shaped structure enables lateral-current-injection, high-Q cavity, and strong optical confinement. The device exhibits 13.0-μA threshold current and 28.0% external differential-quantum-efficiency.
Approaching the Quantum Noise Limit of Heterodyne between a Continuous Wave Laser and an Optical Frequency Comb
Authors: Tsao Eugene , Lordi Noah , Lind Alex , Heyrich Matthew , Combes Josh , Diddams Scott A.
Published: July 2023

Frequency comb heterodyne underlies the highest precision measurements of frequency and time. While shot noise is typically considered the standard quantum limit,here we state where a new lower limit lies and show progress reaching this limit.
Integrated electro-optical modulator and photodetector for the mid-infrared spectral range
Authors: Nguyen Thi Hao Nhi , Koompai Natnicha , Turpaud Victor , Peltier Jonathan , Frigerio Jacopo , Calcaterra Stefano , Ballabio Andrea , Coudevylle Jean-Rene , Villebasse Cedric , Bouville David , Alonso-Ramos Carlos , Vivien Laurent , Isella Giovanni , Marris-Morini Delphine
Published: July 2023

We report high speed integrated electro-optic modulator and integrated photodetector operating in a wide spectral range from 5 to 8 µm wavelength. Modulation is reported up to 1 GHz, while the photodetector responsivity reaches up to 0.1 mA/W. The development of a complete photonic platform including modulator and photodetector paves the way for on chip synchronous detection for multi-molecule on-chip spectroscopic systems.
Spectral Analysis of Surface-adsorbed Chemical Absorption in an On-chip Mid-IR Microresonator
Authors: Ko Kiyoung , Suk Daewon , Wang Rongping , Chun Byung Jae , Ko Kwang-Hoon , Choi Duk-Yong , Lee Hansuek
Published: July 2023

We spectrally analyze the optical loss coming from surface-adsorbed chemicals in a mid-IR microresonator. Hydrocarbon and hydroxyl absorption proportional to surface E-field intensity dominate the Q-factor over the 3-4 μm wavelength.
Photonic frequency synthetic dimensions for high-dimensional convolutions
Authors: Fan Lingling , Zhao Zhexin , Wang Kai , Dutt Avik , Wang Jiahui , Buddhiraju Siddharth , Wojcik Casey C , Fan Shanhui
Published: July 2023

We show that high-dimensional convolution can be realized in a single dynamically modulated optical ring resonator. The high-dimensional convolution introduced here has broad applications, such as 3D convolution for motion detection and scene reconstruction.
Thermal Crosstalk Rejection for Scaling Quantum-Photonic Systems-on-Chip with Monolithically Integrated Electronics
Authors: Kramnik D. , Ramesh A. , Wang I. , Cabanillas J.M. Fargas , Buchbinder S. , Zarkos P. , Adamopoulos C. , Kumar P. , Popović M.A. , Stojanović V.
Published: July 2023

We demonstrate integrated feedback control of a C-band microring quantum-correlated photon-pair source fabricated in a monolithic electronics-photonics platform that maintains lock in the presence of nearby on-die thermal disturbances.
Multifunction Photonic Integrated Circuit Chip for Photon-Pair Generation and Manipulation
Authors: Pham Tien-Dat , Chiu Cheng-Chung , Tsai Pin-Ju , Chen Yen-Hung
Published: July 2023

A highly integrated photonic circuit comprising two type-0 spontaneous parametric down-converters and two electro-optic modulators for manipulating the generated photon pairs is developed. Demonstrated results show its great application potential for photonic quantum information processing.
Rapid Multiplex Ultrafast Nonlinear Microscopy for Advanced Material Characterization
Authors: Purz Torben L. , Hipsley Blake T. , Martin Eric. W. , Ulbricht Ronald , Cundiff Steven T.
Published: July 2023

We demonstrate rapid four-wave mixing (FWM) imaging to assess the quality of emerging optical and electronic materials. We show that FWM intensity, dephasing times, and excited state lifetimes are accurate sample quality indicators.
Avalanche UTC Photodetector Using InAlAs Collection Layer at High Frequency Range
Authors: Yi Yaofeng , Duan Siyang , Umezawa Toshimasa , Akahane Kouichi , Kawanishi Tetsuya
Published: July 2023

We propose a novel avalanche uni-traveling-carrier type photodetector (UTC-PD) using InAlAs as the collection layer. This UTC-PD achieves an f
3-dB
of 43 GHz and near 30 GHz at multiplication factor of 1 and 2 respectively.
Photothermal Commonpath Interferometry of Silicon Nitride Membranes for Laser Light Sails
Authors: Kumar Tanuj , Feng Demeng , Yin Shenwei , Lin Phyo , Mah Merlin , Fortman Margaret , Jaffe Gabriel R. , Wan Chenghao , Fang Chengyu , Warzoha Ronald , Brar Victor W. , Talghader Joseph J. , Kats Mikhail A.
Published: July 2023

We measured the absorption of stoichiometric suspended silicon-nitride membranes at 1064 nm using photothermal common-path interferometry, aided by a new reference technique that uses monolayer graphene.
Optical Matrix Element of Hexagonal Ge
Authors: Lange V.T. v. , Dijkstra A. , Fadaly E.M.T. , Peeters W.H.J. , Tilburg M.A.J. v. , Bakkers E.P.A.M. , Haverkort J.E.M.
Published: July 2023

Hexagonal Ge has been predicted to have a long 20µs lifetime. A Lasher-Stern-Würfel fit of the photoluminescence spectrum provides an estimation for the lifetime and optical matrix element instead showing a nanosecond radiative lifetime.
In situ Training of Silicon Photonic Neural Networks: from Classical to Quantum
Authors: Shastri Bhavin J. , Sorger Volker , Rotenberg Nir
Published: July 2023

Photonic neural networks perform ultrafast inference operations but are trained on slow computers. We highlight on-chip network training enabled by silicon photonics. We introduce quantum photonic neural networks and discuss the role of weak nonlinearities.
Wideband Transmission of Topologically Confined Modes with Record Low Crosstalk in Fibers
Authors: Ma Zelin , Ramachandran Siddharth
Published: July 2023

We demonstrate record low crosstalk < −40 dB/km for ~35 modes over a km-length fiber with bandwidth exceeding 130 nm covering the S+C+L telecom bands, owing to fundamental mode-mixing resistance offered by the phenomenon of topological confinement.
Subarray Design and Thermal Crosstalk Optimization for Power-Efficient Optical Phased Array
Authors: Wang Wuxiucheng , Lu Lejie , King Lydia , Liu Yongchao , Gong Ming , Li Shuangyang , Wu Hui
Published: July 2023

We propose to address thermal crosstalk in integrated optical phased arrays by circuit design and array control. A silicon photonic chip prototype demonstrates that subarray design and thermal crosstalk optimization reduce power consumption by 38%.
Optical Transport of a Metallic Particle using an All-fiber Airy-like Beam Generator
Authors: Lee Hyeonwoo , Choi Hyucksu , Lee Hyeung Joo , Partanen Mikko , Kim Seokjin , Kim Meongrae , Dholakia Kishan , Oh Kyunghwan
Published: July 2023

A Gaussian beam was transformed into an Airy-like beam in an all-fiber platform by a vertically aligned cylindrical lens. Furthermore, we experimentally demonstrated this beam could optically transport the metallic particle in an aqueous environment.
Zero second-order-dispersion microcombs using CMOS-ready photonics
Authors: Ji Qing-Xin , Jin Warren , Wu Lue , Yu Yan , Yuan Zhiquan , Zhang Wei , Gao Maodong , Li Bohan , Wang Heming , Xiang Chao , Guo Joel , Feshali Avi , Paniccia Mario , Ilchenko Vladimir , Matsko Andrey , Bowers John , Vahala Kerry
Published: July 2023

The wavelength of zero group-velocity-dispersion is engineered in a silicon-nitride coupled-ring resonator. The resonator is hybridly-integrated with a semiconductor laser pump to produce high-power-efficiency microcombs spanning a bandwidth of 9.9 nm near 1560 nm.
Effect of laser and target parameters on excitation dynamics and damage in silicon
Authors: Venkat Prachi , Otobe Tomohito
Published: July 2023

Three-Temperature modeling combined with FDTD is used to study laser excitation and damage in silicon. The model reproduces parametric dependencies observed in damage threshold of silicon and is consistent for a range of interaction conditions.
Experimental Demonstration of Photonic Crystal Nanolaser with sub-µA Threshold Current
Authors: Dimopoulos Evangelos , Xiong Meng , Sakanas Aurimas , Marchevsky Andrey , Dong Gaoneng , Yu Yi , Semenova Elizaveta , Mørk Jesper , Yvind Kresten
Published: July 2023

We demonstrate a photonic crystal laser exhibiting an ultra-low threshold of 732 nA. This is the lowest room-temperature value reported for any laser. Furthermore, the measured bandwidth shows that the laser facilitates low-energy on-chip links.
Interferometric Photonic Crystal Modulators with Lithium Niobate
Authors: Larocque Hugo , Sludds Alexander , Sattari Hamed , Christen Ian , Vitullo Dashiell L.P. , Ghadimi Amir H. , Englund Dirk , Heuck Mikkel
Published: July 2023

We demonstrate a photonic crystal cavity interferometric modulator in thin-film lithium niobate on insulator with 6 GHz bandwidth, 35 dB extinction, 2π ×1.27 GHz/V DC-tuning, and a 40-by-200 micron square footprint.
Conservative Solitons and Reversibility in Time-Delayed models for Optical Micro-Cavities
Authors: Seidel Thomas , Javaloyes Julien , Gurevich Svetlana V.
Published: July 2023

We are interested in the dynamics of dispersive temporal pulses in optical micro-cavities. Our work is set within the framework of time-delayed systems. While time-delayed systems are usually considered devoid of the essential dispersive effects, recently it was showed that controllable dispersion may appear naturally in models involving delayed algebraic equations (DAEs) [1, 2, 3].
Loading and unloading a time cavity moving at the speed of light
Authors: Melchert Oliver , Babushkin Ihar , Morgner Uwe , Demircan Ayhan
Published: July 2023

We consider nonlinear-photonic cavities, flying at the speed of light, with the ability to trap photons. We demonstrate that a nonreciprocal interaction channel can serve to load and unload the cavity.
Single Mode Optical Fiber Couplers Made of ZBLAN Glass
Authors: Rezaei Mohsen , Zeweldi Gebrehiwot Tesfay , Shamim Md Hosne Mobarok , Rochette Martin
Published: July 2023

We demonstrate single-mode ZBLAN optical fiber couplers. A coupling ratio of 61%/39% is achieved with insertion loss of 4.3 dB at a wavelength of 2.7 µm. Couplers are reproducible and remain stable over > 180 days.
Fully Epitaxial AlN on Si using Molecular Beam Epitaxy Grown Nanowires for Ultraviolet Photonics
Authors: Zhao Songrui
Published: July 2023

This work focuses on the development of high quality fully epitaxial AlN on Si template using MBE grown nanowires. Vertical AlGaN deep UV LED devices are also demonstrated as an example application of the template.
Stimulated generation of platicon frequency microcombs and their nonlinear dynamical evolution
Authors: Chu Allen , Liu Hao , Wang Wenting , Huang Shu-Wei , Yu Mingbin , Kwong Dim-Lee , Wong Chee Wei
Published: July 2023

We generate a square platicon with a 17 ps pulse width and 21% pump-to-comb conversion efficiency in the normal dispersion regime. A 2 ps platicon pulse width can be accessed with auxiliary-laser-assisted thermal stabilization.
All-Optical Purification of Arbitrary Spectral Waveforms via Cross-Phase Modulation Based Spectral Talbot Amplifier
Authors: Li Zijian , Xie Qijie , Zhang Ziyue , Zhang Yuanfei , Zhang Honghui , Shu Chester
Published: July 2023

Using cross-phase modulation based spectral Talbot amplifier, we achieve purification and in-band noise mitigation of arbitrary broadband spectral waveforms. The optical signal-to-noise-ratio is improved by 9 dB, enabling recovery of spectral waveforms hidden under noise.
Low-voltage integrated lithium niobate phase modulator for efficient electro-optic comb generation
Authors: Zhang Ke , Sun Wenzhao , Chen Yikun , Feng Hanke , Zhang Yiwen , Chen Zhaoxi , Wang Cheng
Published: July 2023

We realize an EO comb generator with 15× reduction in electrical power consumption using a multi-loop mode-multiplexing design, generating 47 comb lines using a moderate RF driving power of 28 dBm at 25 GHz.
Design and resonator-assisted characterization of low-loss waveguide crossings on thin-film lithium niobate
Authors: Chen Yikun , Zhang Ke , Feng Hanke , Sun Wenzhao , Wang Cheng
Published: July 2023

We report thin-film lithium niobate waveguide crossings along three crystal-routing directions, which are precisely characterized by a novel resonator-based method, showing insertion loss of 0.070 dB and crosstalk of -50 dB at 1550 nm.
Dual-Comb Cr:ZnS Single-Cavity Laser Operating at 2.36-µm
Authors: Nussbaum-Lapping Alexander , Barh Ajanta , Heidrich Jonas , Gaulke Marco , Golling Matthias , Phillips Christopher R. , Keller Ursula
Published: July 2023

The first single-cavity SESAM-based dual-modelocked laser operating at 2.36 µm is presented. It was achieved by spatially multiplexing two pulse trains in a Cr:ZnS solid-state laser cavity.
High-Resolution Line-by-Line Pulse Shaper for Driving Josephson Junctions
Authors: Lee Dahyeon , Nakamura Takuma , Metcalf Andrew J. , Quinlan Franklyn
Published: July 2023

We present a high-resolution line-by-line pulse shaper at 1064 nm designed to produce arbitrary pulse patterns for driving Josephson junctions. We generate complex pulse patterns and verify line-by-line operation on a 1 GHz-spaced comb.
Rotational mode competition in coupled mid-infrared quantum cascade ring lasers
Authors: Kacmoli Sara , Gmachl Claire F.
Published: July 2023

Photonic molecules are promising platforms to study complex physical phenomena, yet they remain unexplored in the mid-infrared. We show (anti)correlation of counter-propagating modes in a mid-infrared photonic molecule comprised of coupled ring quantum cascade lasers.
Plasmonic Phase-Gradient Image Sensors
Authors: Liu Jianing , Li Yuyu , Wang Hao , Tian Lei , Paiella Roberto
Published: July 2023

We report plasmonic metasurface photodetectors featuring a strong asymmetric angular response around normal incidence that can visualize transparent phase objects with high sensitivity in a simple and compact imaging setup.
Generation of Low-Frequency Kerr Combs in Highly Compact Photonic Structures
Authors: Beals Garrett , Zhao Yun , McNulty Karl , Sanyal Swarnav , Dacha Sai Kanth , Lipson Michal , Gaeta Alexander L.
Published: July 2023

We demonstrate on-chip single and multi-soliton generation in a 16-GHz free-spectral range compact spiral microresonator with a total area of 1 mm2. We measure the phase noise of states with different soliton numbers, which can be used for low-noise high-power microwave generation.
Machine Learning Aided Prediction of Fabrication Uncertainties in Integrated Multi-Ring Filters
Authors: Tunesi Lorenzo , Khan Ihtesham , Masood Muhammad Umar , Marchisio Andrea , Ghillino Enrico , Curri Vittorio , Carena Andrea , Bardella Paolo
Published: July 2023

We propose a machine learning-based framework to predict the fabrication uncertainty and evaluate the effective-index shift in multi-ring integrated filtering elements. Excellent results are achieved in predicting each ring’s effective-index shift.
An Efficient Deep Learning-Based Electromagnetic Response Prediction Model for Coding Grid Meta-atoms
Authors: Zhang Yu , Wang Yue , Li Yong , Wang Yu , Wu Junde , Zhang Shengqian , Yang Guohui , Di Xiaoguang , Fu Jiahui , Wang Chunhui
Published: July 2023

We proposed an efficient deep learning-based ElectroMagnetic (EM) response prediction model for coding grid meta-atoms. Prediction errors are less than 3° and 1.5% in phase and reflectivity.
TaAs Wely semimetal single-unit multi-port integrated polarimeter
Authors: Ma Hongrui , Luo Haokun , Wei Yunxuan , Christodoulides Demetrios N. , Khajavikhan Mercedeh
Published: July 2023

We demonstrate a single-unit polarimeter based on a TaAs Weyl semimetal thin film which produces unique current responses to any polarization state on the Poincaré sphere in the near infrared band. This design opens up a new paradigm in integrated polarimeters.
High-sensitivity characterization of relative timing jitter in a bidirectional dual-comb fiber laser
Authors: Nakajima Yoshiaki , Kubota Kousuke , Uchiyama Ryusei , Yumoto Takumi , Kokuyama Wataru
Published: July 2023

The relative timing jitter of a high-coherence bidirectional dual-comb fiber laser was evaluated to be 100 fs (1-kHz to 10-MHz) with a measurement limit of 2×10−9 fs2/Hz using phase measurements of carrier-envelope-offsets and optical beat-notes.
Mid-infrared dual-comb spectroscopy for high-speed chemical kinetics measurements in a shock tube
Authors: Hoghooghi Nazanin , Chang Peter , Egbert Scott , Burch Matt , Lynch Patrick , Diddams Scott A. , Rieker Gregory B.
Published: July 2023

We report high-speed measurements of chemical kinetics reactions inside a shock tube using a 1-GHz repetition rate mid-infrared dual-comb spectrometer. We show formation of formaldehyde and sub-sequent decomposition to carbon-monoxide with 17.5 μs time resolution.
High-resolution Dual Comb Spectroscopy to Validate High-temperature H2O Absorption Models
Authors: Egbert Scott C. , Coburn Sean C. , Sung Keeyoon , Drouin Brian J. , Rieker Gregory B.
Published: July 2023

We present broadband dual frequency comb measurements of high-temperature water vapor from 1.3-1.5 μm (6660-7700 cm-1) under controlled conditions up to 1300 K. This data is used to validate recently proposed high-temperature absorption models.
Uncooled Silicon-based Terahertz Metamaterial Photodetectors with Ultrafast Response
Authors: Zhao Shiqiang , Wen Yongzheng , Wang Chen , Li Yan , Yu Kaixin , Peng Xiaoxuan , Sun Jingbo , Zhou Ji
Published: July 2023

We experimentally demonstrate an ultrafast terahertz detector based on n-type doped silicon at room temperature, based on the enhanced response from metamaterials. This strategy opens new possibilities in the development of integrated terahertz devices.
Characterization of femtosecond laser-written waveguides in silicon
Authors: Alasgarzade Namig , Alberucci Alessandro , Blothe Markus , Chambonneau Maxime , Jisha Chandroth P. , Nolte Stefan
Published: July 2023

We characterize laser-written waveguides in silicon versus the inscription parameters such as scanning speed and pulse energy. The analysis is carried out at different wavelengths and polarization states. Finally, the silicon sample is annealed to investigate the possible mechanism that leads to positive refractive index changes.