A5053476055- Photonic and Optical Devices
- Nonlinear Dynamics and Pattern Formation
- Neural Networks and Reservoir Computing
- Mechanical and Optical Resonators
- Semiconductor Lasers and Optical Devices
- Chaos control and synchronization
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Metamaterials and Metasurfaces Applications
- Advanced MEMS and NEMS Technologies
- Spectroscopy and Laser Applications
- Advanced Photonic Communication Systems
- Photonic Crystals and Applications
- stochastic dynamics and bifurcation
- Orbital Angular Momentum in Optics
- Advanced Adaptive Filtering Techniques
- Plasmonic and Surface Plasmon Research
- Chaos-based Image/Signal Encryption
- Advanced Memory and Neural Computing
- Advanced Antenna and Metasurface Technologies
- Force Microscopy Techniques and Applications
- Neural dynamics and brain function
- Phase-change materials and chalcogenides
- Optical Coatings and Gratings
- Advanced Optical Imaging Technologies
Southwest University
2016-2025
Sichuan University
2011-2025
Shenzhen University
2023
University of California, Los Angeles
2015-2022
Chongqing University
2017-2022
Samueli Institute
2021
Central South University
2020
Columbia University
2015-2020
Optica
2015-2020
Southeast University
2009
Infrared camouflage is an effective technique to avoid many kinds of target detection by detectors in the infrared band. For a high-temperature environment, thermal management selective emission crucial dissipate heat mid-infrared non-atmospheric window (5-8 μm). However, it still remains challenges for balancing and management. Here, we experimentally demonstrate multilayer film structure (MFS) with Combining ideal spectrum genetic algorithm (GA), inverse-design MFS containing 7 layers five...
We experimentally and numerically demonstrate the time delay (TD) signature suppression of chaotic output in a double optical feedback semiconductor laser (DOF-SL) system. Two types TD are demonstrated by adjusting lengths power ratios two external cavities. One can significantly eliminate all signatures DOF-SL system corresponding spectrum distribution becomes quite smooth flat, other suppresses one remains another one.
Using two mutually coupled semiconductor lasers (MC-SLs) outputs as chaotic entropy sources, a scheme for generating Tbits/s ultra-fast physical random bit (PRB) is demonstrated and analyzed experimentally. Firstly, sources originating from of MC-SLs are obtained in parallel. Secondly, by adopting multiple optimized post-processing methods, PRB streams with the generation rate 0.56 extracted their randomness verified using NIST Special Publication 800-22 statistical tests. Through merging...
Mid-infrared free-space optical communication has a large potential for high speed due to its immunity electromagnetic interference. However, data security against eavesdroppers is among the obstacles private communication. Here, we show that two uni-directionally coupled quantum cascade lasers operating in chaotic regime and synchronization between them allow extraction of information been camouflaged emission. This building block represents key tool implement degree privacy directly on...
Chaos in nonlinear dynamical systems is featured with irregular appearance and high sensitivity to initial conditions. Near-infrared light chaos based on semiconductor lasers has been extensively studied enabled various applications. Here, we report a fully-developed hyperchaos the mid-infrared regime, which produced from interband cascade subject external optical feedback. Lyapunov spectrum analysis demonstrates that exhibits three positive exponents. Particularly, chaotic signal covers...
Thermal radiation in the mid-wave infrared (MWIR) and long-wave (LWIR) regions profoundly influences human lives. However, most thermal regulators exhibit mismatched spectral characteristics multiband incompatibility. Here, we introduce a new type of ultrathin absorber─a dual-band dynamic optical coating (DBDOC)─to realize independent regulation MWIR LWIR regions. A framework is employed to maximize emissivity performance DBDOC The bicolor changes for are 0.80 0.46 (3–5 μm) (8–14 regions,...
Chaos has revolutionized the field of nonlinear science and stimulated foundational studies from neural networks, extreme event statistics, to physics electron transport. Recent in cavity optomechanics provide a new platform uncover quintessential architectures chaos generation underlying physics. Here, we report dynamical silicon-based monolithic optomechanical oscillators, enabled by strong coupled nonlinearities two-photon absorption induced Drude electron-hole plasma. Deterministic...
Abstract Nanophotonic devices with high densities are extremely attractive because they can potentially merge photonics and electronics at the nanoscale. However, traditional integrated photonic circuits designed primarily by manually selecting parameters or employing semi-analytical models. Limited small parameter search space, nanophotonic generally have a single function, footprints reach hundreds of microns. Recently, novel ultra-compact digital structures were proposed. By applying...
In environments where traditional fiber optic cables are impractical, free-space optical communications offer a promising solution for transmitting large amounts of data, especially in the mid-infrared wavelength range. Despite advantages minimal atmospheric interference and stable signals, vulnerability wireless to eavesdropping poses significant challenge. This study addresses this challenge by demonstrating method privately data using photonic chaos from distributed feedback quantum...
In this paper, evolution of time delay (TD) signature chaos generated in a mutual delay-coupled semiconductor lasers (MDC-SLs) system is investigated experimentally and theoretically. Two statistical methods, including self-correlation function (SF) permutation entropy (PE), are used to estimate the TD chaotic series. Through extracting characteristic peak from SF curve, series maps firstly obtained parameter space coupled strength frequency detuning. Meantime, influences injection current...
Condensation freezing inhibition is of great practical importance for anti-icing applications; however, no coatings with this performance have been reported. Here, we report the condensation on patterned polyelectrolyte coatings, including brush (PB), multilayer (PEM), and hydrogel (PH) surfaces, benefiting from their feature in regulating ice nucleation propagation via changing counterions. On reported can be initiated exclusively at domains polyelectrolytes; moreover, spontaneous achieved...
The time delay (TD) signature concealment of optical feedback induced chaos in an external cavity semiconductor laser is experimentally demonstrated. Both the evolution curve and distribution map TD are obtained parameter space strength injection current. optimum scope also specified. Furthermore, approximately periodic relation between length observed indicates that intrinsic relaxation oscillation may play important role during process suppression.
A fiber-optic chaos communication system for allowing bidirectional message transmission is first constructed and experimentally demonstrated. Using the synchronized outputs of two authorized semiconductor lasers as carriers, oppositely transmitted high frequency analog messages (3 4 GHz) can be encrypted decrypted between terminals over a 10-km single mode fiber channel. Furthermore, data streams with bit rates 2.5 Gb/s also bidirectionally bit-error-rates estimated below 10 <sup...
A novel fiber-optic chaos synchronization system allowing bidirectional long-distance communication is proposed. For this system, between two response lasers (RLs) achieved via an identical driven chaotic signal injection from a remote driving laser (DL) over fiber. The simulated results show that under suitable operation conditions, high-quality the RLs can be obtained while quality any one of and DL bad, which useful for improving security. Using synchronized output signals as carriers...
The dynamics of monolithically integrated amplified feedback lasers (AFL) is investigated through numerical simulation and experimental verification. period-doubling route to chaos high-frequency microwave generation are demonstrated simulation. Then, we design fabricate AFLs. Mappings dynamic states oscillation frequency in the parameter space phase section current I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</sub> amplifier...
A series of reconfigurable compact photonic arbitrary power splitters are proposed based on the hybrid structure silicon and Ge2Sb2Se4Te1 (GSST), which is a new kind non-volatile optical phase change material (O-PCM) with low absorption. Our pixelated meta-hybrid has an extremely small integrated circuit (PIC) footprint size comparable to that most advanced electronic circuits (EICs). The power-split ratio can be reconfigured in completely digital manner through amorphous crystalline...
Metalens optical tweezers technology has several advantages for manipulating micro-nano particles and high integration. Here, we used particle swarm optimization (PSO) to design a novel metalens tweezer, which can get 3-dimensional trapping of particles. The numerical aperture (NA) the reach 0.97 average focusing efficiency is 44%. Subsequently, analyzed force characteristics SiO2 with radius 350 nm at focal point achromatic metalens. We found maximum in x-direction z-direction be 0.88 pN...
Optical power splitters with ultra-broadband and ultra-low insertion loss are desired in the field of photonic integration. Combining two inverse design algorithms for staged optimization, we present a Y-junction splitter 700 nm wavelength bandwidth (from 1200 to 1900 nm) within 0.2 dB loss, corresponding 93 THz frequency bandwidth. The average is approximately -0.057 valuable C-band. Moreover, comprehensively compared performance different types sizes curved waveguides, also give cases 1:4...
We propose and experimentally demonstrate a parallel pulsed chaos light detection ranging (LiDAR) system with high peak power, parallelism, anti-interference. The generates chaotic microcombs based on chip-scale Si 3 N 4 microresonator. After passing through an acousto-optic modulator, the continuous-wave microcomb can be transformed into microcomb, in which each comb line provides chaos. Thus, signal is generated. Using as transmission of LiDAR, we successfully realize 4-m three-dimensional...
Abstract Metalenses, with their compact form factor and unique optical capabilities, hold tremendous potential for advancing computer vision applications. In this work, we propose a high-resolution, large field-of-view (FOV) metalens intelligent recognition system, combining the latest YOLO framework, aimed at supporting range of tasks. Specifically, demonstrate its effectiveness in scanning, pose recognition, object classification. The designed to achieve 100° FOV while operating near...
Vertical meta-grating couplers (VMGCs), while essential for flexible spatial beam coupling in meta-photonic integrated circuits (MPICs), suffer from inherently low efficiency that hinders broader applications. In this study, we introduce an improved adjoint optimization method with high computational and excellent effectiveness. Utilizing method, demonstrate ultra-compact single-polarization VMGC achieving 81.57% a 92 nm 3 dB bandwidth, dual-polarization beam-splitting coupler over 52% both...