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Optically pumped semiconductor nanowire lasers

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Frontiers of Optoelectronics 2012年第3期5卷 239-247页

作者： yaoguang ma Limin TONG State Key Laboratory of Modem Optical Instrumentation Department of Optical Engineering Zhejiang University Hangzhou 310027 China

This paper reviews our recent work on fabrication, optical characterization and lasing application of semiconductor nanowires, with brief introduction of related work from many other groups.

关键词： semiconductor nanowire nanowire laser,optical pump microfiber

Low-dose real-time X-ray imaging with nontoxic double perovskite scintillators

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Light(Science & Applications) 2020年第1期9卷 947-956页

作者： Wenjuan Zhu Wenbo ma Yirong Su Zeng Chen Xinya Chen yaoguang ma Lizhong Bai Wenge Xiao Tianyu Liu Haiming Zhu Xiaofeng Liu Huafeng Liu Xu Liu Yang(Michael)Yang State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhouZhejiangChina Center for Chemistry of High-Performance&Novel materials department of ChemistryZhejiang UniversityHangzhouZhejiangChina

X-rays are widely used in probing inside information nondestructively,enabling broad applications in the medical radiography and electronic industries.X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention ***,the strong self-absorption,relatively low light yield and lead toxicity of these perovskites restrict their practical ***,we report a series of nontoxic double-perovskite scintillators of Cs_(2)Ag_(0.6)Na_(0.4)In_(1-y)Bi_(y)Cl_(6).By controlling the content of the heavy atom Bi^(3+),the X-ray absorption coefficient,radiative emission efficiency,light yield and light decay were manipulated to maximise the scintillator performance.A light yield of up to 39,000±7000 photons/MeV for Cs_(2)Ag_(0.6)Na_(0.4)In_(0.85)Bi_(0.15)Cl_(6) was obtained,which is much higher than that for the previously reported lead halide perovskite colloidal CsPbBr_(3)(21,000 photons/MeV).The large Stokes shift between the radioluminescence(RL)and absorption spectra benefiting from self-trapped excitons(STEs)led to a negligible selfabsorption *** the high light output and fast light decay of this scintillator,static X-ray imaging was attained under an extremely low dose of ∼1μGy_(air),and dynamic X-ray imaging of finger bending without a ghosting effect was demonstrated under a low-dose rate of 47.2μGy_(air) s^(−1).After thermal treatment at 85℃ for 50 h followed by X-ray irradiation for 50 h in ambient air,the scintillator performance in terms of the RL intensity and X-ray image quality remained almost *** results shed light on exploring highly competitive scintillators beyond the scope of lead halide perovskites,not only for avoiding toxicity but also for better performance.

关键词： perovskite absorption double

Microtaper leaky-mode spectrometer with picometer resolution

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eLight 2023年第1期3卷 177-187页

作者： Qingqing Cen Sijie Pian Xinhang Liu Yuwei Tang Xinying He yaoguang ma State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and Engineering/International Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research InstituteZhejiang UniversityJiaxing 314000China

The wide application of optical spectroscopy makes miniaturized spectrometers with fundamental *** scalability,high-performance,low-cost,and small footprint are still contradicting each other and limiting the applicability of miniaturized spectrometer for practical *** we propose a compact spectrometer that satisfies the four *** device uses a fiber taper tip to generate complex leaky mode patterns within 1 mm *** unique correspondence between the pattern and wavelength operates effectively for hundreds of nanometers spectral range while providing a spectral resolution around~1 *** integration of multiple taper tips enables hyperspectral imaging *** working range of our device can be further extended using different materials and detectors while keeping the similar architecture.

关键词： Spectrometer Microfiber Deep learning Hyperspectral

Recent progress on the applications of micro/nanofibers in ultrafast optics

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Frontiers of Information Technology & Electronic Engineering 2024年第9期25卷 1193-1208页

作者： Xinying HE Yuhang LI Zhuning WANG Sijie PIAN Xu LIU yaoguang ma State Key Laboratory for Extreme Photonics and Instrumentation College of Optical Science and EngineeringIntelligent Optics and Photonics Research CenterJiaxing Research InstituteZJU-Hangzhou Global Scientific and Technological Innovation CenterInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310027China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBejing 100084China

Ultrafast fiber lasers are indispensable components in the field of ultrafast optics,and their continuous performance advancements are driving the progress of this exciting ***/Nanofibers(MNFs)possess unique properties,such as a large fractional evanescent field,flexible and controllable dispersion,and high nonlinearity,making them highly valuable for generating ultrashort ***,in tasks involving mode-locking and dispersion and nonlinearity management,MNFs provide an excellent platform for investigating intriguing nonlinear dynamics and related phenomena,thereby promoting the advancement of ultrafast fiber *** this paper,we present an introduction to the mode evolution and characteristics of MNFs followed by a comprehensive review of recent advances in using MNFs for ultrafast optics applications including evanescent field modulation and control,dispersion and nonlinear management techniques,and nonlinear dynamical phenomenon ***,we discuss the potential application prospects of MNFs in the realm of ultrafast optics.

关键词： Micro/Nanofibers(MNFs) Nonlinear dynamics Dispersion Ultrafast optics

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超构表面:设计原理与应用挑战(特邀)

中国激光 2024年第1期51卷 259-279页

作者：马耀光高宇斌浙江大学极端光学技术与仪器全国重点实验室光电科学与工程学院先进光子学研究中心嘉兴研究院智能光子研究中心浙江大学杭州国际科创中心浙江杭州310027

作为一种二维形式的超构材料,超构表面允许以前所未有的自由度对光的振幅、相位、偏振等维度进行灵活高效的调控,有望突破传统光学的限制,实现低成本、高性能、超轻超薄、功能新颖的新型光学元件,近年来引起了学术界和产业界越来越浓厚... 详细信息

作为一种二维形式的超构材料,超构表面允许以前所未有的自由度对光的振幅、相位、偏振等维度进行灵活高效的调控,有望突破传统光学的限制,实现低成本、高性能、超轻超薄、功能新颖的新型光学元件,近年来引起了学术界和产业界越来越浓厚的研究兴趣。从物理机理、相位调控到正向设计方法,系统回顾了超构表面的设计原理。介绍了这些机理如何用于实现丰富的应用,包括功能复用、宽带宽、大视场、多层级联、非局域超构表面等,涵盖了最主要和最新的发展方向。最后,讨论了超构表面在走向实用化的道路上所面临的器件设计和加工制造上的挑战,并对领域未来的发展进行展望。

关键词：材料超构表面超构透镜成像光学全息复用消色差成像

Solution-processed halide perovskite microcavity exciton-polariton light-emitting diodes working at room temperature

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Photonics Research 2023年第10期11卷 1791-1801页

作者： TIANYU LIU PENG RAN YIRONG SU ZENG CHEN RENCHEN LAI WEIDONG SHEN yaoguang ma HAIMING ZHU YANG(MICHAEL)YANG State Key Laboratory of Modern Optical Instrumentation Institute for Advanced PhotonicsCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Modern Optical Instrumentation Key Laboratory of Excited State Materials of Zhejiang ProvinceDepartment of ChemistryZhejiang UniversityHangzhou 310027China Instrumentation and Service Center for Molecular Sciences Westlake UniversityHangzhou 310024China

Exciton-polaritons offer the potential to achieve electrically pumped perovskite polariton lasers with much lower current thresholds than conventional photonic lasers. While optically pumped exciton-polaritons have been widely studied in halide perovskites, electrically-pumped polaritons remain limited. In this study, we demonstrate the use of a solution-processing strategy to develop halide perovskite polariton light-emitting diodes(LEDs) that operate at room temperature. The strong coupling of excitons and cavity photons is confirmed through the dispersion relation from angle-resolved reflectivity, with a Rabi splitting energy of 64 meV. Our devices exhibit angle-resolved electroluminescence following the low polariton branch and achieve external quantum efficiencies of 1.7%, 3.85%, and 3.7% for detunings of 1.1,-77, and-128 meV, respectively. We also explore devices with higher efficiency of 5.37% and a narrower spectral bandwidth of 6.5 nm through the optimization of a top emitting electrode. Our work demonstrates, to our knowledge, the first room-temperature perovskite polariton LED with a typical vertical geometry and represents a significant step towards realizing electrically pumped perovskite polariton lasers.

关键词： pumped diodes tuning

Lasing characteristics of curved semiconductor nanowires

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Frontiers of Optoelectronics 2013年第4期6卷 448-451页

作者： Weisong YANG Yipei WANG yaoguang ma Chao MENG Xiaoqin WU Qing YANG State Key Laboratory of Modern Optical Instrumentation Department of Optical Engineering Zhcjiang University Hangzhou 310027 China State Kcy Laboratory for Mesoscopic Physics Department of Physics Peking University Beijing 100871 China

The characteristics of curved semiconductor nanowire （NW） lasers were investigated. The red-shift in the laser spectra with increasing bending angles can be observed much more clearly than that in the photolumi- nescence （PL） spectra. Due to oscillation of light in resonant cavity, the bending loss of laser exhibits multiple times amplification of that of PL. Furthermore, an abnormal phenomenon of dominant peak switching is found in curved NWs when increasing the pump power, which has been first discovered and reported.

关键词： semiconductor nanowire lasing characteris-tics red-shift bending loss dominant peaks

Surface-patterned chalcogenide glasses with high-aspect-ratio microstructures for long-wave infrared metalenses

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Opto-Electronic Science 2024年第10期3卷 1-13页

作者： Zhaofeng Gu Yixiao Gao Kongsi Zhou Junyang Ge Chen Xu Lei Xu Mohsen Rahmani Ran Jiang Yimin Chen Zijun Liu Chenjie Gu yaoguang ma Jianrong Qiu Xiang Shen Laboratory of Infrared materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Zhejiang Key Laboratory of Advanced Optical Functional materials and Devices Ningbo 315211China Advanced Optics&Photonics Laboratory Department of EngineeringSchool of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUnited Kingdom Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational ResearchCenter for Advanced PhotonicsZhejiang UniversityHangzhou 310027China Ningbo Institute of Oceanography Ningbo 315832China

Multidimensional-engineering chalcogenide glasses is widely explored to construct various infrared photonic devices,with their surface as a key dimension for wavefront ***,we demonstrate direct patterning high-aspect-ratio microstructures on the surface of chalcogenide glasses offers an efficient and robust method to manipulate longwave infrared *** chalcogenide glass being considered soft in terms of its mechanical properties,we successfully fabricate high-aspect-ratio micropillars with a height of 8μm using optimized deep etching process,and we demonstrate a 2-mm-diameter all-chalcogenide metalens with a numerical aperture of 0.45 on the surface of a 1.5-mm-thick As2Se3 *** the exceptional longwave infrared(LWIR)transparency and moderate refractive index of As2Se3 glass,the all-chalcogenide metalens produces a focal spot size of~1.39λ0 with a focusing efficiency of 47%at the wavelength of 9.78μm,while also exhibiting high-resolution imaging *** work provides a promising route to realize easy-to-fabricate,mass-producible planar infrared optics for compact,light-weight LWIR imaging systems.

关键词： chalcogenide glasses long wave infrared metalens

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单模半导体纳米线激光器

中国激光 2020年第7期47卷 31-46页

作者：片思杰 Salman Ullah 杨青马耀光浙江大学现代光学仪器国家重点实验室浙江大学光电科学与工程学院教育部光子学国际合作联合实验室浙江杭州310027 之江实验室浙江杭州310000

随着通信行业的快速扩张以及光互联、片上实验室等技术的发展,人们对激光器等器件集成化、小型化的需求日益增长。半导体纳米线激光器由于其独特的一维结构与灵活的带隙调控性能等特点,在微纳激光器领域受到广泛研究。实现单模输出的半... 详细信息

随着通信行业的快速扩张以及光互联、片上实验室等技术的发展,人们对激光器等器件集成化、小型化的需求日益增长。半导体纳米线激光器由于其独特的一维结构与灵活的带隙调控性能等特点,在微纳激光器领域受到广泛研究。实现单模输出的半导体纳米线激光器,对光互联、传感、光谱学以及干涉测量等领域具有重要意义。综述了单模半导体纳米线激光器的基本技术与研究进展。介绍了半导体纳米线激光器的常用材料,并利用圆介质波导模型分析了其基本模式特性,详细阐述了半导体纳米线实现单模激光输出的主要方法以及发展现状,并对各方案面临的挑战进行了总结。

关键词：激光光学单模半导体纳米线激光器纳米线激光器模式选择短腔耦合腔