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Emerging of two-dimensional materials in novel memristor

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Frontiers of physics 2022年第2期17卷 107-120页

作者： Zhican Zhou Fengyou Yang Shu Wang Lei Wang Xiaofeng Wang Cong Wang Yong Xie Qian Liu moe key laboratory of weak-light nonlinear photonics Department of PhysicsNankai UniversityTianjin 300071China CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing 100190China College of Mathematics and physics Shandong Advanced Optoelectronic Materials and Technologies Engineering LaboratoryQingdao University of Science and TechnologyQingdao 266061China College of Mathematics and physics Beijing University of Chemical TechnologyBeijing 100029China school of physics Beihang UniversityBeijing 100191China

The rapid development of big-data analytics(BDA),internet of things(IoT)and artificial intelligent Technology(AI)demand outstanding electronic devices and systems with faster processing speed,lower power consumption,and smarter computer ***,as a promising Non-Volatile Memory(NVM)device,can effectively mimic biological synapse,and has been widely studied in recent *** appearance and development of two-dimensional materials(2D material)accelerate and boost the progress of memristor systems owing to a bunch of the particularity of 2D material compared to conventional transition metal oxides(TMOs),therefore,2D material-based memristors are called as new-generation intelligent *** this review,the memristive(resistive switching)phenomena and the development of new-generation memristors are demonstrated involving graphene(GR),transition-metal dichalcogenides(TMDs)and hexagonal boron nitride(h-BN)based ***,the related progress of memristive mechanisms is remarked.

关键词： memristor resistive switching 2D material switching mechanism conductive channel

Characterization of Photon Statistical Properties with Normalized Mandel Parameter

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Chinese physics Letters 2008年第11期25卷 3976-3979页

作者：张心正王振华李辉吴强唐柏权高峰许京军 The key laboratory of weak-light nonlinear photonics (Ministry of Education) TEDA Applied Physics School and Institute of Physics Nankai University Tianjin 300457

Normalized Mandel Parameter （Q） is introduced as a new measurement oi photon statistics. Dependences of Mandel parameter Q and corresponding normalized Mandel parameter （Q） on photon-counting time interval are experimentally investigated for pseudo-thermal light. We demonstrate that （Q） is more appropriate than Q, to measure the statistical deviation from Poisson distribution, because （Q） presents clearly both the intrinsic statistical properties and measuring effects. The advantages of （Q） in charactering nonclassical emissions are also discussed.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Dynamically taming focal fields of femtosecond lasers for fabricating microstructures

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Chinese Optics Letters 2022年第1期20卷 6-11页

作者：蔡孟强王强涂成厚李勇男王慧田 school of physics and key laboratory of weak light nonlinear photonics Nankai UniversityTianjin 300071China Institute of Space Science and Technology Nanchang UniversityNanchang 330031China National laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Collaborative Innovation Center of light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Micromachining based on femtosecond lasers usually requires accurate control of the sample movement,which may be very complex and ***,the exploration of micromachining without sample movement is ***,we have illustrated the manipulation of optical fields by controlling the polarization or phase to vary periodically and then realized certain focal traces by real-time loading of the computer-generated holograms(CGHs) on the spatial light *** focal trace is composed of many discrete focal spots,which are generated experimentally by using the real-time dynamically controlled *** the designed focal traces,various microstructures such as an ellipse,a Chinese character "Nan",and an irregular quadrilateral grid structure are fabricated in the z-cut LiNbO_(3) wafers,showing good qualities in terms of continuity and *** method proposes a movement free solution for micromachining samples and completely abandons the high precision stage and complex movement control,making microstructure fabrication more flexible,stable,and cheaper.

关键词： manipulation of optical fields computer-generated holograms focal trace microstructures

Sum-frequency generation in on-chip lithium niobate microdisk resonators

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photonics Research 2017年第6期5卷 142-147页

作者： ZHENZHONG HAO JIE WANG SHUQIONG MA WENBO MAO FANG BO FENG GAO GUOQUAN ZHANG JINGJUN XU The moe key laboratory of weak light nonlinear photonics TEDA Institute of Applied Physics and School of PhysicsNankai University The Collaborative Innovation Center of Extreme Optics Shanxi University

We report the first observation, to the best of our knowledge, of sum-frequency generation in on-chip lithium niobate microdisk resonators. The sum-frequency signal in the 780 nm band, distinct in wavelength from secondharmonic signals, was obtained in lithium niobate microresonators under the pump of two individual 1550 nm band lasers. The sum-frequency conversion efficiency was measured to be 1.4 × 10^(-7) mW^(-1). The dependence of the intensities of the nonlinear signals on the total pump power and the wavelength of one pump laser was investigated while fixing the wavelength of the other. This work paves the way for applications of on-chip lithium niobate microdisk resonators ranging from infrared single-photon detection to infrared spectroscopy.

关键词： SFG Sum-frequency generation in on-chip lithium niobate microdisk resonators SHG

Interfaces of high-efficiency kesterite Cu_2ZnSnS(e)_4 thin film solar cells

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Chinese physics B 2018年第1期27卷 2-18页

作者：高守帅姜振武武莉敖建平曾玉孙云张毅 Institute of Photoelectronic Thin Film Devices and Technology Tianjin Key Laboratory of Photoelectronic Thin Film Devices and TechnologyNankai University The moe key laboratory of weak-light nonlinear photonics School of Physics Nankai University

Cu2ZnSnS（e）4 （CZTS（e）） solar cells have attracted much attention due to the elemental abundance and the non- toxicity. However, the record efficiency of 12.6% for CuzZnSn（S,Se）4 （CZTSSe） solar cells is much lower than that of Cu（In,Ga）See （CIGS） solar cells. One crucial reason is the recombination at interfaces. In recent years, large amount inves- tigations have been done to analyze the interfacial problems and improve the interfacial properties via a variety of methods. This paper gives a review of progresses on interfaces of CZTS（e） solar cells, including：（i） the band alignment optimization at buffer/CZTS（e） interface, （ii） tailoring the thickness of MoS（e）2 interfacial layers between CZTS（e） absorber and Mo back contact, （iii） the passivation of rear interface, （iv） the passivation of front interface, and （v） the etching of secondary phases.

关键词： Cu2ZnSnS4 solar cells kesterite interface passivation

All-atomristor logic gates

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Nano Research 2023年第1期16卷 1688-1694页

作者： Shu Wang Zhican Zhou Fengyou Yang Shengyao Chen Qiaoxuan Zhang Wenqi Xiong Yusong Qu Zhongchang Wang Cong Wang Qian Liu CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology&University of Chinese Academy of SciencesBeijing 100190China moe key laboratory of weak-light nonlinear photonics TEDA Applied Physics InstituteSchool of PhysicsNankai UniversityTianjin 300457China Electrical Automation Department Hebei University of Water Resources and Electric EngineeringCangzhou 061001China school of physics and Technology Wuhan UniversityWuhan 430072China International Iberian Nanotechnology laboratory(INL) Braga 4715-330Portugal College of Mathematics and physics Beijing University of Chemical TechnologyBeijing 100029China

The atomristor(monolayer two-dimensional(2D)-material memristor)is competitive in high-speed logic computing due to its binary feature,lower energy consumption,faster switch response,and so *** to date,all-atomristor logic gates used for logic computing have not been reported due to the poor consistency of different atomristors in ***,by studying band structures and electron transport properties of MoS2 atomristor,a comprehensive memristive mechanism is *** by the simulation results,monolayer MoS2 with moderated defect concentration has been fabricated in the experiment,which can build atomristors with high performance and good *** on this,for the first time,MoS2 all-atomristor logic gates are realized *** a demonstration,a half-adder based on the logic gates and a binary neural network(BNN)based on crossbar arrays are evaluated,indicating the applicability in various logic computing *** to shorter transition time and lower energy consumption,all-atomristor logic gates will open many new opportunities for next-generation logic computing and data processing.

关键词： atomristor logic gates combinational logic circuit neural network defect concentration

Time-resolved multiple imaging by detecting photons with changeable wavelengths

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Chinese Optics Letters 2017年第8期15卷 35-39页

作者：孔令军刘瑞司宇王周祥涂成厚李勇男王慧田 moe key laboratory of weak light nonlinear photonics and school of physics Nankai University National laboratory of Solid State Microstructures and school of physics Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University

Transporting information is one of the important functions of photons and is also the essential duty of information science. Here, we realize multiple imaging by detecting photons with changeable wavelengths based on time-resolved correlation measurements. In our system, information from multiple objects can be transported. During this process, the wavelength of the photons illuminating the objects is different from the wavelength of the photons detected by the detectors. More importantly, the wavelength of the photons that are utilized to record images can also be changed to match the sensitive range of the used detectors. In our experiment, images of the objects are reconstructed clearly by detecting the photons at wavelengths of 650, 810, and 1064 nm, respectively. These properties should have potential applications in information science.

关键词： Time-resolved multiple imaging by detecting photons with changeable wavelengths SPDC ICCD BBO PBS

Sum-frequency generation of a laser and its background in an on-chip lithium-niobate microdisk

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Chinese Optics Letters 2022年第11期20卷 49-52页

作者：郝振中张莉王杰薄方高峰张国权许京军 moe key laboratory of weak-light nonlinear photonics TEDA Institute of Applied Physics and School of PhysicsNankai UniversityTianjin 300457China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Lithium-niobate microcavities have not only the ability to resonantly enhance light–matter interaction but also excellent nonlinear optical properties,thereby providing an important platform for nonlinear optical *** this paper,we report the observation of multi-peak spectra in the near infrared range in lithium-niobate microcavities on a chip under the pump of a 1550 nm continuous *** a multi-peak spectrum was attributed to the sum-frequency of the pump laser and its *** conversion efficiencies of the sum-frequency processes are of the order of61.5%*** influences of the phenomenon on nonlinear processes were further discussed.

关键词： lithium niobate microcavities nonlinear optics

Ghost Imaging with High Visibility Using Classical light Source

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Chinese physics Letters 2016年第3期33卷 40-43页

作者：司宇孔令军李勇男涂成厚王慧田 school of physics and moe key laboratory of weak light nonlinear photonics Nankai University National laboratory of Solid State Microstructures Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University

We experimentally demonstrate a novel ghost imaging experiment utilizing a classical light source, capable of resolving objects with a high visibility. The experimental results show that our scheme can indeed realize ghost imaging with high visibility for a relatively complicated object composed of three near-ellipse-shaped holes with different dimensions. In our experiment, the largest hole is -36 times of the smMlest one in area. Each of the three holes exhibits high-visibility in excess of 80%. The high visibility and high spatial-resolution advantages of this technique could have applications in remote sensing.

关键词： of in for Ghost Imaging with High Visibility Using Classical light Source with is SLM high CCD