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An oxide-based heterojunction optoelectronic synaptic device with wideband and rapid response performance

Journal of Materials Science & technology 2022年第28期123卷 159-167页

作者： Chunmei Li Jinyong Wang Dongyang Li Nasir Ilyas Zhiqiang Yang Kexin Chen Peng Gu Xiangdong Jiang Deen Gu Fucai Liu Yadong Jiang Wei Li School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Information Materials of Sichuan Province and School of Preparatory Education Southwest Minzu UniversityChengdu 610041China

With the rapid development of science and technology,the emergence of new application scenarios,such as robots,driverless vehicles and smart city,puts forward high requirements for artificial visual *** synaptic devices have attracted much attention due to their advantages in sensing,memory and computing *** this work,via band structure engineering and heterostructure designing,a heterojunction optoelectronic synaptic device based on Cu doped with n-type SrTiO_(3)(Cu:STO)film combined with p-type CuAlO_(2)(CAO)thin film was *** is found surprisingly that the optoelectronic device based on Cu:STO/CAO p-n heterojunction exhibits a rapid response of 2 ms,and that it has a wideband response from visible to near-infrared(NIR)***,a series of important synaptic functions,including excitatory postsynaptic current(EPSC),paired-pulse facilitation(PPF),shortterm potentiation(STP)to long-term potentiation(LTP)transition,learning experience behavior and image sharpening,have been successfully simulated on the *** importantly,the performance of the device remains still stable and reliable after several months which were stored at room temperature and atmospheric *** on these advantages,the optoelectronic synaptic devices demonstrated here provide great potential in the new generation of artificial visual systems.

关键词： Cu:STO/CAO heterojunction optoelectronic synaptic devices Vis to NIR wideband Rapid response Artificial visual system

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Design of Flexible Films Based on Kinked Carbon Nanofibers for High Rate and Stable Potassium-Ion Storage

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Nano-Micro Letters 2022年第3期14卷 184-200页

作者： Qiaotian Xiong Hongcheng He Ming Zhang Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low‑Dimensional Structural Physics&Devices School of Physics and ElectronicsCollege of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082People’s Republic of China Semiconductor Technology and Application Innovation Institute of Changsha Changsha 410012People’s Republic of China

With the emergence of wearable electronics,flexible energy storage materials have been extensively studied in recent ***,most studies focus on improving the electrochemical properties,ignoring the flexible mechanism and structure design for flexible electrode materials with high rate capacities and long-time *** this study,porous,kinked,and entangled network structures are designed for highly flexible fiber *** on theoretical analysis and finite element simulation,the bending degree of the porous structure(30%porosity)increased by 192%at the *** appropriate increase in kinking degree at the meso-level and contact points in entanglement network at the macro-level are beneficial for the flexibility of fiber ***,a porous and entangled network of sulfur-/nitrogen-co-doped kinked carbon nanofibers(S/N-KCNFs)is *** nanofiber films synthesized from melamine as nitrogen sources and segmented vulcanization exhibited a porous,kinked,and entangled network structure,and the stretching degree increased several *** flexible S/N-KCNFs anode delivered a higher rate performance of 270 mAh g−1 at a current density of 2000 mA g−1 and a higher capacity retention rate of 93.3%after 2000 ***,the foldable pouch cell assembled by potassium-ion hybrid supercapacitor operated safely at large-angle bending and showed long-time stability of 88%capacity retention after 4000 *** study provides a new idea and strategy for the flexible structure design of high-performance potassium-ion storage materials.

关键词： Flexible design Finite element simulation Sulfur-/nitrogen-Co-doped Anode Potassium-ion storage

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Low-loss and broadband complementary dual-output electro-optic modulator based on thin-film lithium niobate

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Chinese Optics Letters 2024年第9期22卷 114-119页

作者： Tingan Li Chenglin Shang Xuanhao Wang Weiqiang Lü Zhiyao Zhang Cheng Zeng Yong Liu Jinsong Xia Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

Broadband,low-drive voltage electro-optic modulators are crucial optoelectronic components in the new-generation microwave photonic links and broadband optical interconnect network *** this paper,we fabricate a low-loss thinfilm lithium niobate complementary dual-output electro-optic modulator chip with a 3 dB electro-optic bandwidth of 59 GHz and a half-wave voltage(Vπ)of 2.5 *** insert-loss of the packaged modulator is 4.2 dB after coupling with polarizationmaintaining *** complementary dual-output modulator also shows a common-mode rejection ratio of 18 dB and a signal enhancement of 6.2 dB when adapted in microwave photonic links,comparable to commercial bulk lithium niobate devices.

关键词： thin-film lithium niobate electro-optic modulator microwave photonic links.

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KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide

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Rare Metals 2025年第1期44卷 404-416页

作者： Li-Ying Deng Qing Zhang Wang-Yang Li Xiao-Yuan Ye Yi-Fan Zhao Shen-Zhong Chen Yu-Lan Wang Xing-Hui Wang Hui-Peng Chen Zhi-Yang Yu Qun Yan Shu-Ying Cheng Tai-Liang Guo Wen-Ping Hu Feng Ding Jie Sun National and Local United Engineering Laboratory of Flat Panel Display Technology College of Physics and Information EngineeringFuzhou UniversityFuzhou350100China Fujian Key Laboratory of Agricultural Information Sensing Technology College of Mechanical and Electrical EngineeringFujian Agriculture and Forestry UniversityFuzhou350002China Key Laboratory of Organic Integrated Circuit Department of ChemistrySchool of ScienceMinistry of Education and Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China College of Physics and Information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou350108China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou350116China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518000China

Two-dimensional(2D)metal oxides(2DMOs),such as MoO_(2),have made impressive strides in recent years,and their applicability in a number of fields such as electronic devices,optoelectronic devices and lasers has been ***,2DMOs present challenges in their synthesis using conventional methods due to their non-van der Waals *** report that KCl acts as a flux to prepare large-area 2DMOs with sub-millimeter *** systematically investigate the effects of temperature,homogeneous time and cooling rate on the products in the flux method,demonstrating that in this reaction a saturated homogenous solution is obtained upon the melting of the salt and ***,the cooling rate was adjusted to regulate the thickness of the target crystals,leading to the precipitation of 2D non-layered material from the supersaturated solution;by applying this method,the highly crystalline non-layered 2D MoO_(2)flakes with so far the largest lateral size of up to sub-millimeter scale(~464μm)were *** studies have revealed that the 2D MoO_(2)features metallic properties,with an excellent sheet resistance as low as 99Ω·square^(-1 )at room temperature,and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature.

关键词： 2D non-layered materials Metallic Metal oxide Thickness modulation Flux method

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An Edge Fast Mapping Approach for Temperature Balance in Photonic Network on Chip 6

An Edge Fast Mapping Approach for Temperature Balance in Pho...

引用

6th International Conference on Artificial Intelligence and Computer Applications, ICAICA 2024

作者： Wei, Wenrui Zhu, Aijun Cheng, Lei Gu, Zhanqi Bu, Pengcheng Guilin University of Electronic Technology Guangxi Key Laboratory of Automatic Detecting Technology and Instruments Guilin541004 China Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems Shanxi Jincheng048000 China Jincheng Research Institute of Opto-Mechatronics Industry Shanxi Jincheng048000 China

ISBN: (纸本)9798350377255

Photonic Network on Chip (PNoC) have a lot of advantages, such as high bandwidth, low latency, and stable transmission. However, there is crosstalk noise and insertion loss during optical signal data transmission in PNoC, which affects communication performance and energy consumption. The impact will further increase when the ambient temperature changes. The IP core mapping in PNoC will directly affect the traffic distribution of the network, thereby affecting the insertion loss and crosstalk noise. An edge fast mapping algorithm proposed in the article aims to achieve temperature balance by evenly dispersing the traffic in the network. Simulation results demonstrate that the proposed mapping algorithm can achieve fast mapping while reducing the impact of temperature on network transmission energy consumption. © 2024 IEEE.

关键词： Crosstalk

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Mid-infrared conventional solitons and soliton molecules in a polarization-maintaining fluoride fiber oscillator

Mid-infrared conventional solitons and soliton molecules in ...

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2023 Advanced Fiber Laser Conference, AFL 2023

作者： Zeng, Qinghui Yu, Linpeng Yan, Peiguang Wang, Jinzhang Lue, Qitao Guo, Chunyu Ruan, Shuangchen Shenzhen Key Laboratory of Laser Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Key Lab. of Adv. Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Shenzhen Technology University Shenzhen518118 China Han s Laser Technology Industry Group Co. Ltd Shenzhen518057 China

ISBN: (纸本)9781510677661

Mid-infrared conventional solitons and soliton molecules are generated in a polarization-maintaining erbium-doped fluoride fiber oscillator, where a semiconductor saturable absorber is used as the mode locker and a polarization beam splitter is employed for getting linearly polarized output pulses. By rotating the half-wave plate in front of the polarization beam splitter to change the output coupling ratio, the system is switchable between conventional solitons and soliton molecules. conventional solitons with a pulse duration of 120 ps, a maximum average power of 248 mW, and a repetition rate of 44.5 MHz are obtained when the oscillator operates in the single-pulse mode-locked state. By decreasing the output coupling ratio, the operating regime of the oscillator switches to the soliton-molecule mode-locked state, in which soliton-triplets equally distributed at a repetition rate of 44.5 MHz with a signal-to-noise ratio of 78 dB and a temporal separation of 60 ps are obtained. Our work offers a scheme to realize switchable operations between the conventional soliton and the soliton molecule in the mid-infrared polarization-maintaining mode-locked fiber laser. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Fluorine compounds

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Optimization and far-field characteristic of metal/dielectric coated circular semiconductor nano-lasers

Optimization and far-field characteristic of metal/dielectri...

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2023 Applied Optics and Photonics China: Laser technology and Applications;and optoelectronic devices and Integration, AOPC 2023

作者： Sun, Qiaoge Guo, Chucai College of Advanced Interdisciplinary Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense Technology Hunan Changsha410073 China

ISBN: (纸本)9781510672246

Metal/dielectric coated semiconductor lasers with sub-wavelength dimensions have shown promising applications in photonics integrated circuits and on-chip optical interconnects. In this study, we optimize the structure of circular InAlGaAs/InP nanocavities by employing the finite-difference time-domain (FDTD) numerical simulation method. It was found that, the quality factors of monopole modes in a cavity with radius of 250 nm can be over 1000 after structure optimization. Furthermore, the far-field characteristics of resonant modes in the cavities with different radius were studied. For the monopole modes, the divergent angle of far-field distribution decreases along with the increase of longitudinal order. Meanwhile, the cavity radius has a significant effect on the far-field distribution for monopole modes. For the dipole modes, the far-field distribution concentrates on a small angle range which is much better than that of monopole modes, and the effect of cavity radius on the far-field distribution is small. The research results of this study provide valuable insights for the design and fabrication of efficient and high-performance nano-lasers. © 2023 SPIE.

关键词： Semiconductor lasers

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Suppression of self-pulsing in high power Tm3+-doped fiber laser

Suppression of self-pulsing in high power Tm3+-doped fiber l...

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2023 Advanced Fiber Laser Conference, AFL 2023

作者： Shen, Shiteng Dong, Fanlong Yan, Peiguang Wang, Jingzhang Lue, Qitao Guo, Chunyu Ruan, Shuangchen Shenzhen Key Laboratory of Laser Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Key Lab. of Adv. Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Shenzhen Technology University Shenzhen518118 China Han s Laser Technology Industry Group Co. Ltd Shenzhen518057 China

ISBN: (纸本)9781510677661

In this paper, a high power Tm3+-doped fiber laser (TDFL) based on a monolithic master oscillator power amplifier (MOPA) system with the center wavelength is 1940 nm is demonstrated. The maximum laser power was measured to be 200 W with a slope efficiency of 56.2% at the 793 nm pump power of 368.6 W. Power stability of the laser output over 60 min is measured to be ∼0.12%, which indicate a relatively stable laser operation of the TDFL. The output power is limited by the available pump power for the lack of amplified spontaneous emission, parasitic oscillation or self-pulsing effects even at the maximum output power level, showing further power scaling should be possible with increase the pump power. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Fiber lasers

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Electronic structure of cuprate-nickelate infinite-layer heterostructure

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Chinese Physics B 2023年第8期32卷 391-396页

作者：陈大川 Paul Worm 司良张春小邓凤麟蒋沛恒钟志诚 CAS Key Laboratory of Magnetic Materials and Devices&Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Institut für Festkörperphysik TU WienVienna 1040Austria School of Physics Northwest UniversityXi'an 710127China School of Physics and Optoelectronic Engineering Shandong University of TechnologyShandong 250049China

The discovery of superconductivity in Sr/Ca-doped infinite-layer nickelates Nd(La)NiO_(2)thin films inspired extensive experimental and theoretical ***,research on the possibilities of enhanced critical temperature by interface heterostructure is still *** to the similarities of the crystal structure and band structure of infinite-layer nickelate La NiO_(2)and cuprate CaCuO_(2),we investigate the crystal,electronic and magnetic properties of La NiO_(2):CaCuO_(2)heterostructure using density functional theory and dynamical mean-field *** theoretical results demonstrate that,even a very weak inter-layer z-direction bond is formed,an intrinsic charge transfer between Cu-3d_(x^(2)-y^(2))and Ni-3d_((x^(2)-y^(2)))orbitals is *** weak interlayer hopping between Cu and Ni leaves a parallel band contributed by Ni/Cu-3d_((x^(2)-y^(2)))orbitals near the Fermi *** an infinite-layer heterostructure with negligible interlayer interaction and robust charge transfer opens a new way for interface engineering and nickelate superconductors.

关键词： nickelate superconductor infinite-layer oxide perovskite heterostructure

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Origami-inspired folding assembly of dielectric elastomers for programmable soft robots

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Microsystems & Nanoengineering 2022年第2期8卷 73-83页

作者： Yanhua Sun Dengfeng Li Mengge Wu Yale Yang Jingyou Su Tszhung Wong Kangming Xu Ying Li Lu Li Xinge Yu Junsheng Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054People's Republic of China Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing Co-Innovation Center for Micro/Nano Optoelectronic Materials and DevicesMicro/Nano Optoelectronic Materials and Devices International Science and Technology Cooperation Base of ChinaSchool of Materials Science and EngineeringChongqing University of Arts and SciencesChongqing 402160People's Republic of China Department of Biomedical Engineering City University of Hong KongHong Kong SAR 999077People's Republic of China

Origami has become an optimal methodological choice for creating complex three-dimensional(3D)structures and soft *** simple and low-cost origami-inspired folding assembly provides a new method for developing 3D soft robots,which is ideal for future intelligent robotic ***,we present a series of materials,structural designs,and fabrication methods for developing independent,electrically controlled origami 3D soft robots for walking and soft *** 3D soft robots are based on soft actuators,which are multilayer structures with a dielectric elastomer(DE)film as the deformation layer and a laser-cut PET film as the supporting flexible *** triangular and rectangular design of the soft actuators allows them to be easily assembled into crawling soft robots and pyramidal-and square-shaped 3D *** crawling robot exhibits very stable crawling behaviors and can carry loads while *** by origami folding,the pyramidal and square-shaped 3D soft robots exhibit programmable out-of-plane deformations and easy switching between two-dimensional(2D)and 3D *** electrically controllable origami deformation allows the 3D soft robots to be used as soft manipulators for grasping and precisely locking 3D *** work proves that origami-inspired fold-based assembly of DE actuators is a good reference for the development of soft actuators and future intelligent multifunctional soft robots.

关键词： robot folding dielectric

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