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2023 Advanced Fiber Laser Conference, AFL 2023

作者： Shi, Xiangyuan Ji, Wei Liu, Pengcheng Yin, Peng Key Laboratory of Laser and Infrared System Integration Technology Ministry of Education Shandong University Qingdao266237 China School of Information Science and Engineering Shandong University Qingdao266237 China School of Cyber Security University of Chinese Academy of Sciences 100049 China

ISBN: (纸本)9781510677661

A novel wired and wireless hybrid access system based on self-homodyne and heterodyne technology is presented in this paper. With the 16 Quadrature Amplitude Modulation(16QAM) and optimized self-homodyne mechanism, the system achieves 224Gbit/s wired access. Through optical heterodyne technology, the 30GHz wireless covering is implemented. The performance of the system is further improved by using the Pre-Compensation module and Post-Compensation module. Self-homodyne system improves the Optical Signal Noise Ratio(OSNR) threshold by 1.7 dB compared to the conventional coherent system, while reducing the system device requirements. The adoption of the Pre-Compensation module will save 1.7dB of OSNR tolerance even further. DSP modules of low computational complexity suitable for self-homodyne system and heterodyne system are redesigned. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Quadrature amplitude modulation

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Ultra-long THz Bessel beams based on an axicon system 10

Ultra-long THz Bessel beams based on an axicon system

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infrared, Millimeter-Wave, and Terahertz Technologies X 2023

作者： Chang, Hengqing Chen, Ruyi Zhang, Zhenwei Yang, Yuping School of Science Minzu University of China Beijing100081 China Beijing Engineering Research Center of Terahertz and Infrared Technology Key Laboratory of Terahertz Optoelectronics Department of Physics Capital Normal University Beijing100048 China

ISBN: (纸本)9781510668010

In terahertz (THz) range, ultra-long non-diffraction Bessel beams have been theoretically and experimentally developed and consequently achieved significant advancements. Nevertheless, the balance between non-diffraction length and optical intensity is restricted and their applications have been limited in part due to their complication in access and operation, loss of energy and spectral bandwidth. In this work, a composite system composed of multiple lenses and axicon is presented to engender ultra-long terahertz Bessel beams. By manipulating the spatial relationships between various THz components, the delivery distance and non-diffraction length surpass 40 cm and 2 m respectively. © 2023 SPIE.

关键词： Diffraction

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Short mid-infrared watt-level all-fiber nonlinear pulse compressor above 100-MHz pulse repetition rate

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High Power Laser science and Engineering 2023年第1期11卷 107-113页

作者： Jingcheng Shang Chao Mei Shengzhi Zhao Yizhou Liu Kejian Yang Chun Wang Tao Li Tianli Feng School of Information Science and Engineering Shandong Provincial Key Laboratory of Laser Technology and ApplicationShandong UniversityQingdaoChina Key Laboratory of Laser&Infrared System(Shandong University) Ministry of EducationQingdaoChina Institute of Novel Semiconductors State Key Laboratory of Crystal MaterialsShandong UniversityJinanChina Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services SCCEUniversity of Science and Technology BeijingBeijingChina

We firstly report a 2-μm all-fiber nonlinear pulse compressor based on two pieces of normal dispersion fiber(NDF),which enables a high-power scaling ability of watt-level and a high pulse compression ratio of *** the NDFbased all-fiber nonlinear pulse compressor,the 450-fs laser pulses with a repetition rate of 101.4 MHz are compressed to 35.1 fs,corresponding to a 5.2 optical oscillation cycle at the 2-μm wavelength *** output average power reaches 1.28 W,which is believed to be the highest value never achieved from the previous 2-μm all-fiber nonlinear pulse compressors with a high pulse repetition rate above 100 *** dynamic evolution of the ultrafast pulse inside the all-fiber nonlinear pulse compressor is numerically analyzed,matching well with the experimental results.

关键词： few-optical-cycle pulses high pulse repetition rate nonlinear pulse compression

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Cu2O-Enhanced Back Surface Field Empowers Selenium-Based TiO2/Sb2Se3 Thin Film Solar Cells to Achieve Efficiency over 32%

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Applied Solar Energy (English translation of Geliotekhnika) 2023年第6期59卷 836-850页

作者： Sultana, Basra Islam, A. T. M. Saiful Haque, Md. Dulal Kuddus, Abdul Department of Electrical and Electronic Engineering Southeast University Dhaka Bangladesh Department of Electrical and Electronic Engineering Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj8100 Bangladesh Department of Electronics and Communication Engineering Hajee Mohammad Danesh Science and Technology University Dinajpur5200 Bangladesh State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics University of Chinese Academy of Science Shanghai China Ritsumeikan University BKC Shiga525-8577 Japan

Abstract: Antimony (Sb) chalcogenides, particularly antimony selenide (Sb2Se3), have gained attention as promising semiconductor materials in order to creat and advancement of competitive solar cells. These materials exhibit a range of desirable qualities, such as excellent absorption rate, ability to modify band gap, and plentiful in the crust of the earth. This article describes an antimony selenide (Sb2Se3) absorber based high-efficient thin film solar cell (TFSC) with copper oxide (Cu2O) as as back surface field (BSF) by dint of Al/ITO/TiO2/Sb2Se3/Cu2O/Ni heterostructure using SCAPS-1D Simulator. This research entails an in-depth assessment of various physical and electrical characteristics of every solar active semiconductorof TiO2,Sb2Se3, and Cu2O covering the thickness of each layer, concentration of carrier doping, defect density in the bulk and at the interface, carrier generation rate together with recombination. Initially, the variation in photovoltaic parameters of open circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF), power conversion efficiency (PCE), and quantum efficiency (QE) investigated without the BSF layer, followed by a comprehensive analysis on the role of Cu2O BSF layer for enhancing cell’s performance explored systematically. The proposed heterostructure shows improved PCE of over 32% (which was 21% without BSF) with JSC of 37.492 mA/cm2, VOC of 1.024 V, and FF of 83.595%. Thus, the utilisation of a heterostructure comprising Sb2Se3 absorber and copper oxide Cu2O BSF layer demonstrates significant promise in the development and production the high-efficiency greenery thin-film solar cells (TFSCs). © Allerton Press, Inc. 2023. ISSN 0003-701X, Applied Solar Energy, 2023, Vol. 59, No. 6, pp. 836–850. Allerton Press, Inc., 2023.

关键词： Selenium compounds

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Van der Waals two-color infrared photodetector

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Light(science & Applications) 2022年第2期11卷 179-187页

作者： Peisong Wu Lei Ye Lei Tong Peng Wang Yang Wang Hailu Wang Haonan Ge Zhen Wang Yue Gu Kun Zhang Yiye Yu Meng Peng Fang Wang Min Huang Peng Zhou Weida Hu State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China University of Chinese Academy of Sciences Beijing 100049China Hubei Yangtze Memory Labs School of Optical and Electronic Information and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhanHubei 430205China State Key Laboratory of ASIC and Systems School of MicroelectronicsFudan UniversityShanghai 200433China

With the increasing demand for multispectral information acquisition,infrared multispectral imaging technology that is inexpensive and can be miniaturized and integrated into other devices has received extensive ***,the widespread usage of such photodetectors is still limited by the high cost of epitaxial semiconductors and complex cryogenic cooling ***,we demonstrate a noncooled two-color infrared photodetector that can provide temporal-spatial coexisting spectral blackbody detection at both near-infrared and mid-infrared *** photodetector consists of vertically stacked back-to-back diode *** two-color signals can be effectively separated to achieve ultralow crosstalk of~0.05%by controlling the built-in electric field depending on the intermediate layer,which acts as an electron-collecting layer and hole-blocking *** impressive performance of the two-color photodetector is verified by the specific detectivity(D^(*))of 6.4×10^(9)cm Hz^(1/2)W^(−1)at 3.5μm and room temperature,as well as the promising NIR/MWIR two-color infrared imaging and absolute temperature detection.

关键词： photodetector spectral absolute

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Multi-Channel Based on Attention Network for infrared Small Target Detection

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Journal of Shanghai Jiaotong university(science) 2024年第3期29卷 414-427页

作者：张彦军王碧云蔡云泽 Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Aerospace Control Technology Shanghai 201109China Infrared Detection Technology R&D Center of China Aerospace Science and Technology Corporation Shanghai 201109China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai 200240China Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China

infrared detection technology has the advantages of all-weather detection and good concealment,which is widely used in long-distance target detection and tracking ***,the complex background,the strong noise,and the characteristics of small scale and weak intensity of targets bring great difficulties to the detection of infrared small targets.A multi-channel based on attention network is proposed in this paper,aimed at the problem of high missed detection rate and false alarm rate of traditional algorithms and the problem of large model,high complexity and poor detection performance of deep learning ***,given the difficulty in extracting the features of infrared multiscale and small dim targets,the multiple channels are designed based on dilated convolution to capture multiscale target ***,the coordinate attention block is incorporated in each channel to suppress background clutters adaptively and enhance target *** addition,the fusion of shallow detail features and deep abstract semantic features is realized by synthesizing the contextual attention fusion ***,it is verified that,compared with other state-of-the-art methods based on the datasets SIRST and MDFA,the proposed algorithm further improves the detection effect,and the model size and computational complexity are smaller.

关键词： infrared image small target detection deep learning attention mechanism feature fusion

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Analytical Impact-Excitation Theory of Er/O/B Codoped Si Light-Emitting Diodes

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Physical Review Letters 2024年第24期132卷 246901-246901页

作者： Xiaoming Wang Jiajing He Ao Wang Kun Zhang Yufei Sheng Weida Hu Chaoyuan Jin Hua Bao Yaping Dan State Key Laboratory of Advanced Optical Communication Systems and Networks University of Michigan–Shanghai Jiao Tong University Joint Institute Aerospace Laser Technology and System Department Global Institute of Future Technology State Key Laboratory of Infrared Physics College of Information Science and Electronic Engineering

Er doped Si light-emitting diodes may find important applications in silicon photonics and optical quantum computing. These diodes exhibit an emission efficiency 2 orders of magnitude higher at reverse bias than forward bias due to impact excitation. However, physics of impact excitation in these devices remains largely unexplored. In this work, we fabricated an Er/O/B codoped Si light-emitting diode which exhibits a strong electroluminescence by the impact excitation of electrons inelastically colliding the Er ions. An analytical impact-excitation theory was established to predict the electroluminescence intensity and internal quantum efficiency which fit well with the experimental data. From the fittings, we find that the excitable Er ions reach a record concentration of 1.8×1019 cm−3 and up to 45% of them is in an excitation state by impact excitation. This work has important implications for developing efficient classical and quantum light sources based on rare earth elements in semiconductors.

关键词： Density of states Electrical conductivity Electrical properties Electroluminescence Ion impact & scattering LEDs

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14.1 W continuous-wave dual-end diode-pumped Er:Lu_(2)O_(3)laser at 2.85μm

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Chinese Optics Letters 2024年第1期22卷 84-89页

作者：梁洋洋李涛张百涛何京良 Sascha Kalusniak 赵显 Christian Kränkel Key Laboratory of Laser&Infrared System Ministry of EducationShandong UniversityQingdao 266237China School of Information Science and Engineering Shandong Provincial Key Laboratory of Laser Technology and ApplicationShandong UniversityQingdao 266237China Institute of Novel Semiconductors State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Leibniz-Institut für Kristallzüchtung(IKZ) Berlin 12489Germany

We present our efforts towards power scaling of Er:Lu_(2)O_(3)lasers at 2.85μ*** applying a dual-end diode-pumped resonator scheme,we achieve an output power of 14.1 W at an absorbed pump power of 59.7 W with a slope efficiency of 26%.In a single-end pumped resonator scheme,an output power of 10.1 W is reached under 41.9 W of absorbed pump *** the best of our knowledge,this is the first single crystalline mid-infrared rare-earth-based solid-state laser with an output power exceeding 10 W at room temperature.

关键词： high-power continuous-wave laser mid-infrared laser dual-end pump scheme

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Design and Simulation Experiment of a New Magnetron Sputtering Cathode Surface Magnetic Field Structure 7

Design and Simulation Experiment of a New Magnetron Sputteri...

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7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Junnru, Wang Yongke, Wang Yu, Yaowei Zongsheng, Chen Zhigang, Li Yahui, Wang Xiangyin, Lv Jiao, Peng College of Electronic Engineering National University of Defense Technology State Key Laboratory of Pulsed Power Laser Technology Hefei230037 China College of Electronic Engineering National University of Defense Technology Anhui Provincial Laboratory of Advanced Laser Technology Hefei230037 China College of Electronic Engineering National University of Defense Technology Infrared and Low Temperature Plasma Key Laboratory of Anhui Province Hefei230037 China Institute of Plasma Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei230031 China West Anhui University Lu'an237012 China

ISBN: (纸本)9798350359558

Magnetron sputtering is widely used in the field of material surface modification of low-temperature plasma, in which the magnetic field design of the cathode directly affects the quality of film formation and process cost. In order to optimize the magnetic field of the existing magnetron sputtering target, a structure with alternate distribution of internal and external magnetic yokes and permanent magnets is designed, and the finite element simulation experiment is carried out by using the method of parameter control variables. By studying the influence of magnetic circuit structure parameters on the magnetic field strength and distribution uniformity of the target surface, the parameters of key components such as permanent magnets and magnetic yokes were optimized and determined. The simulation results show that with the design structure of the cathode, the uniformity of the horizontal magnetic induction intensity on the surface of the cathode is 49.4% and the target utilization rate is 50.3%, which effectively improves the magnetic field uniformity and target utilization. © 2024 IEEE.

关键词： Cathodes

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Special kinetics features of scandium antimonide thin films conducive to swiftly embedded phase-change memory applications

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science China Materials 2024年第11期67卷 3684-3691页

作者： Xue-Peng Wang Bin Chen Huang Gong Xinxin Duan Yimin Chen Feng Rao College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of New Information Display and Storage Materials Shenzhen UniversityShenzhen 518060China College of Mathematics and Statistics Shenzhen UniversityShenzhen 518060China Laboratory of Infrared Material and Devices&Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Advanced Technology Research InstituteNingbo UniversityNingbo 315211China

Embedded phase-change random-access memory(ePCRAM)applications demand superior data retention in amorphous phase-change materials(PCMs).Traditional PCM design strategies have focused on enhancing the thermal stability of the amorphous phase,often at the expense of the crystallization *** this approach supports reliable microchip operations,it compromises the ability to achieve rapid *** address this limitation,we modified ultrafast-crystallizing Sb thin films by incorporating Sc dopants,achieving the highest 10-year retention temperature(~175℃)among binary antimonide PCMs while maintaining a sub-10-ns SET operation *** reconciliation of two seemingly contradictory properties arises from the unique kinetic features of the 5-nm-thick Sc12Sb88 films,which exhibit an enlarged fragile-to-strong crossover in viscosity at medium supercooled temperature zones and an incompatible sublattice ordering behavior between the Sc and Sb *** tailoring the crystallization kinetics of PCMs through strategic doping and nanoscale confinement,we provide new opportunities for developing robust yet swift ePCRAMs.

关键词： embedded phase-change memory scandium antimonide crystallization kinetics flash differential scanning calorimetry

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