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Low Trap Density Para-F Substituted 2D PEA_(2)PbI_(4)(X=Cl,Br,I)Single Crystals with Tunable Optoelectrical Properties and High Sensitive X-Ray Detector Performance

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research 2023年第1期2022卷 273-283页

作者： Jiayu Di Haojin Li Li Chen Siyu Zhang Yinhui Hu Kai Sun Bo Peng Jie Su Xue Zhao Yuqi Fan Zhenhua Lin Yue Hao Peng Gao Kui Zhao Jingjing Chang State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology School of MicroelectronicsXidian University710071 XianChina Advanced Interdisciplinary Research Center for Flexible Electronics Academy of Advanced Interdisciplinary ResearchXidian University710071 Xi'anChina Key Laboratory of Applied Surface and Collid Chemistry National Ministry of EducationSchool of Materials Science and EngineeringShaanxi Normal University710119 Xi'anChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Exploring halogen engineering is of great significance for reducing the density of defect states in crystals of organic-inorganic hybrid perovskites and hence improving the crystal ***,high-quality single crystals of PEA_(2)PbI_(4)(X=CI,Br,I)and their para-F(p-F)substitution analogs are prepared using the facile solution method to study the effects of both p-F substitution and halogen anion *** p-F substitution,the triclinic PEA_(2)PbX_(4)(X=Cl,Br)and cubic PEA_(2)PbX_(4)(X=I)crystals unifies to monoclinic crystal structure for p-F-PEA_(2)PbX_(4)(X=Cl,Br,I)*** p-F substitution and halogen engineering,together with crystal structure variation,enable the tunability of optoelectrical ***,after the p-F substitution,the energy levels are lowered with increased Fermi levels,and the bandgaps of p-F-PEA_(2)PbX_(4)(X=Cl,Br,I)are slightly *** from the enhancement of the charge transfer and the reduced trap density by p-F substitution and halogen anion engineering,the average carrier lifetime of the p-F-PEA_(2)PbI_(4)is obviously *** with PEA_(2)PbI_(4)the X-ray detector based on p-F-PEA_(2)PbI_(4)single crystals exhibits higher radiation stability under high-dose X-ray irradiation,implying long-term operando stability.

关键词： properties stability substitution

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D^(6h)Symmetric Radical Donor-Acceptor Nanographene Modulated Interfacial Carrier Transfer for High-Performance Perovskite Solar Cells

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CCS Chemistry 2023年第9期5卷 2159-2170页

作者： Can Wang Yifeng Gao Zhen-Lin Qiu Ping-Ping Sun Naoyuki Shibayama Zilong Zhang Qiu Xiong Fangbin Ren Shui-Yang Lien Lusheng Liang Jiaoxia Zhang Yuan-Zhi Tan Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021 University of Chinese Academy of Sciences Beijing 100049 School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003 Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid SurfacesEngineering Research Center for Nano-Preparation Technology of Fujian ProvinceDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005 Department of Chemistry School of ScienceHainan UniversityHaikou 570228 Faculty of Biomedical Engineering Graduate School of EngineeringToin University of YokohamaYokohamaKanagawa 225-8503 Xiamen University of Technology Xiamen 361024

Imbalanced charge-carrier extraction remains an issue aggravating interfacial charge accumulation and *** hopping transport channels could accelerate the extraction of ***,we demonstrated an effective“bridging interface”strategy between the perovskite/2,2′,7,7′-tetrakis(N,N-di-pmethoxyphenylamine)-9,9′-spirobifluorene(spiro-OMeTAD)that modulates interfacial charge transfer and improves hole mobility using radical-containing donor-acceptor nanographenes(D-A NGs)possessing electron-deficient perchlorinated NGs and electron-rich aniline *** fully delocalized backbone of nanographene formed a conjugated bridge for intermolecular charge transfer and generated stable radical cations,verified by electron spin *** andπ-πstacking orientation of D-A NGs also provided advantageous hopping transport *** favorable charge transfer within D-A NGs,systematic explorations indicated a strong interface coupling and noticeable charge transfer across the D-A NGs and perovskite interface,where electrons would flow from D-A NGs to perovskite,and holes would flow from perovskite to D-A ***,the hole mobility of spiro-OMeTAD was also enhanced because the D-A NGs would diffuse into the spiro-OMeTAD *** a result,planar n-i-p perovskite solar cellsmodified byD-ANG-OMe/D-ANG-tBudeliveredchampion power conversion efficiencies(PCEs)of 23.25%and 23.51%,respectively.

关键词： perovskite solar cell radicals donor-acceptor nanographene hole mobility interfacial charge transfer

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Boosting flexible electronics with integration of two-dimensional materials

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InfoMat 2024年第7期6卷 1-50页

作者： Chongyang Hou Shuye Zhang Rui Liu Thomas Gemming Alicja Bachmatiuk Hongbin Zhao Hao Jia Shirong Huang Weijia Zhou Jian-Bin Xu Jinbo Pang Mark HRümmeli Jinshun Bi Hong Liu Gianaurelio Cuniberti Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinanthe People’s Republic of China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbinthe People’s Republic of China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaithe People’s Republic of China Institute for Materials Chemistry Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)DresdenGermany Lukasiewicz Research Network PORT Polish Center for Technology DevelopmentWroclawPoland State Key Laboratory of Advanced Materials for Smart Sensing GRINM Group Co.LtdBeijingthe People’s Republic of China Institute for Materials Science and Max Bergmann Center of Biomaterials TUD Dresden University of TechnologyDresdenGermany Department of Electronic Engineering The Chinese University of Hong KongHong Kong SARthe People’s Republic of China Institute of Environmental Technology VSB-Technical University of OstravaOstravaCzech Republic College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouthe People’s Republic of China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouthe People’s Republic of China Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland School of Integrated Circuits University of Chinese Academy of SciencesBeijingthe People’s Republic of China Institute of Microelectronics of Tianjin Binhai New Area Tianjinthe People’s Republic of China Institute of Microelectronics Chinese Academy of SciencesBeijingthe People’s Republic of China State Key Laboratory of Crystal Materials Center of Bio and Micro/Nano Functional MaterialsShandong UniversityJinanthe People’s Republic of China

Flexible electronics has emerged as a continuously growing field of ***-dimensional(2D)materials often act as conductors and electrodes in elec-tronic devices,holding significant promise in the design of high-performance,flexible *** studies have focused on harnessing the potential of these materials for the development of such ***,to date,the incorporation of 2D materials in flexible electronics has rarely been summa-rized or ***,there is an urgent need to develop compre-hensive reviews for rapid updates on this evolving *** review covers progress in complex material architectures based on 2D materials,including interfaces,heterostructures,and 2D/polymer ***-ally,it explores flexible and wearable energy storage and conversion,display and touch technologies,and biomedical applications,together with integrated design *** the pursuit of high-performance and high-sensitivity instruments remains a primary objective,the integrated design of flexible electronics with 2D materials also warrants *** combin-ing multiple functionalities into a singular device,augmented by machine learning and algorithms,we can potentially surpass the performance of existing wearable ***,we briefly discuss the future trajectory of this burgeoning *** review discusses the recent advancements in flex-ible sensors made from 2D materials and their applications in integrated archi-tecture and device design.

关键词： 2D materials biomedical healthcare energy storage and conversion flexible electronics heterostructures sensors

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Dual Orthogonally Polarized Lasing Assisted by Imaginary Fermi Arcs in Organic Microcavities

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Physical Review Letters 2024年第12期133卷 123802页

作者： Teng Long Jiahuan Ren Peng Li Feng Yun Guillaume Malpuech Dmitry Solnyshkov Hongbing Fu Feng Li Qing Liao Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry College of Physics Science and Technology Center for Regenerative and Reconstructive Medicine Med-X Institute Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Lab of Information Photonic Technique School of Electronic Science and Engineering Faculty of Electronic and Information Engineering Solid-State Lighting Engineering Research Center PHOTON-N2 75231 Paris France

The polarization control of micro- and nanolasers is an important topic in nanophotonics. Up to now, the simultaneous generation of two distinguishable orthogonally polarized lasing modes from a single organic microlaser remains a critical challenge. Here, we demonstrate simultaneously orthogonally polarized dual lasing from a microcavity filled with an organic single crystal exhibiting selective strong coupling. We show that the non-Hermiticity due to polarization-dependent losses leads to the formation of real and imaginary Fermi arcs with exceptional points. Simultaneous orthogonally polarized lasing becomes possible thanks to the eigenstate mixing by the photonic spin-orbit coupling at the imaginary Fermi arcs. Our work provides a novel way to develop linearly polarized lasers and paves the way for the future fundamental research in topological photonics, non-Hermitian optics, and other fields.

关键词： Exciton polariton Lasers Spin-orbit coupling Non-Hermitian systems Organic microcavities

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Relationship between orbital moment anisotropy, magnetocrystalline anisotropy, and Dzyaloshinskii-Moriya interaction in W/Co/Pt trilayers

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Physical Review B 2024年第18期110卷 184401页

作者： Zhendong Chi Yong-Chang Lau Vanessa Li Zhang Goro Shibata Shoya Sakamoto Yosuke Nonaka Keisuke Ikeda Yuxuan Wan Masahiro Suzuki Masashi Kawaguchi Masako Suzuki-Sakamaki Kenta Amemiya Naomi Kawamura Masaichiro Mizumaki Motohiro Suzuki Hyunsoo Yang Masamitsu Hayashi Atsushi Fujimori Department of Physics Tsukuba Ibaraki 305-0047 Japan School of Physics and Technology Materials Sciences Research Center Institute for Solid State Physics Institute of Materials Structure Science Graduate School of Science and Technology Gunma University Kiryu Gunma 376-8515 Japan (JASRI) Sayo 679-5198 Japan Department of Electrical and Computer Engineering Department of Physics and Center for Quantum Science and Technology

We have studied the Co layer thickness dependences of magnetocrystalline anisotropy (MCA), Dzyaloshinskii-Moriya interaction (DMI), and orbital moment anisotropy (OMA) in W/Co/Pt trilayers, in order to clarify their correlations with each other. We find that the MCA favors magnetization along the film normal and monotonically increases with decreasing effective magnetic layer thickness (teff). The magnitude of the Dzyaloshinskii-Moriya exchange constant (|D|) increases with decreasing teff until teff∼1 nm, below which |D| decreases. The MCA and |D| scale with 1/teff for teff larger than ∼1 nm, indicating an interfacial origin. The increase of MCA with decreasing teff continues below teff∼ 1 nm, but with a slower rate. To clarify the cause of the teff dependences of MCA and DMI, the OMA of Co in W/Co/Pt trilayers is studied using x-ray magnetic circular dichroism. We find nonzero OMA when teff is smaller than ∼0.8 nm. The OMA increases with decreasing teff more rapidly than what is expected from the MCA, indicating that factors other than OMA contribute to the MCA at small teff. The teff dependence of the OMA also suggests that |D| at teff smaller than ∼1 nm is not related to the OMA at the interface. We propose that the growth of Co on W results in a strain and/or texture that reduces the interfacial DMI, and, to some extent, MCA at small teff.

关键词： Dzyaloshinskii-Moriya interaction Magnetic anisotropy Multilayer thin films X-ray absorption spectroscopy X-ray magnetic circular dichroism

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Temperature-mediated tribological characteristics of 40CrNiMoA steel and Inconel 718 alloy during sliding against Si_(3)N_(4) counterparts

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Friction 2021年第5期9卷 1175-1197页

作者： Liuyang BAI Shanhong WAN Gewen YI Yu SHAN Sang The PHAM Anh Kiet TIEU Yan LI Rendong WANG State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Opto-Electronics Engineering University of Chinese Academy of SciencesBeijing 100049China Faculty of Engineering and Information Sciences University of WollongongWollongong 2522Australia State Key Laboratory of Metal Materials for Marine Equipment and Application Anshan 114009China Ansteel Iron&Steel Research Institute Anshan 114009China

A comparative evaluation of the friction and wear behaviors of 40CrNiMoA steel and Inconel 718 alloy sliding against Si_(3)N_(4) counterparts was conducted over a large temperature range from room temperature(RT)to 800℃.The temperature‐dependent tribological properties associated with the resulting chemical mitigation and structural adaptation of the solid sliding surface were clarified by surface/interface *** results revealed desirable performance in reducing friction and wear at elevated temperatures,which was associated with the resulting oxide composite filmʹs adaptive lubricating capability,whereas severe abrasive wear occurred at room/ambient *** oxidative‐abrasive differentials for the two alloys were further discussed by considering the combined effect of temperature and stressed‐shearing conditions.

关键词： steel alloys high‐temperature tribology wear and friction oxidation surface/interface chemistry

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Applications of MXenes in human-like sensors and actuators

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Nano research 2023年第4期16卷 5767-5795页

作者： Jinbo Pang Songang Peng Chongyang Hou Xiao Wang Ting Wang Yu Cao Weijia Zhou Ding Sun Kai Wang Mark H.Rümmeli Gianaurelio Cuniberti Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinan 250022China Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany Dresden Center for Computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China School of Bioengineering Qilu University of TechnologyShandong Academy of ScienceJinan 250353China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Ministry of Education) Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao 266000China School of Electrical and Computer Engineering Jilin Jianzhu UniversityChangchun 130118China Institute for Complex Materials Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key L

Human beings perceive the world through the senses of sight,hearing,smell,taste,touch,space,and *** first five senses are prerequisites for people to *** sensing organs upload information to the nervous systems,including the brain,for interpreting the surrounding ***,the brain sends commands to muscles reflexively to react to stimuli,including light,gas,chemicals,sound,and ***,as an emerging two-dimensional material,has been intensively adopted in the applications of various sensors and *** this review,we update the sensors to mimic five primary senses and actuators for stimulating muscles,which employ MXene-based film,membrane,and composite with other functional ***,a brief introduction is delivered for the structure,properties,and synthesis methods of ***,we feed the readers the recent reports on the MXene-derived image sensors as artificial retinas,gas sensors,chemical biosensors,acoustic devices,and tactile sensors for electronic ***,the actuators of MXene-based composite are ***,future opportunities are given to MXene research based on the requirements of artificial intelligence and humanoid robot,which may induce prospects in accompanying healthcare and biomedical engineering applications.

关键词： MXenes sensors actuators gas sensors biosensors tactile sensors sound sensors artificial retina

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Technology Roadmap for Flexible Sensors

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ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying Rogers, John A. Rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collaborative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

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Gate tunable spatial accumulation of valley-spin in chemical vapor deposition grown 40°-twisted bilayer WS2

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Journal of Semiconductors 2023年第1期44卷 74-78页

作者： Siwen Zhao Gonglei Shao Zheng Vitto Han Song Liu Tongyao Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110010China Institute of Chemical Biology and Nanomedicine State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

The emerging two-dimensional materials,particularly transition metal dichalcogenides(TMDs),are known to exhibit valley degree of freedom with long valley lifetime,which hold great promises in the implementation of valleytronic ***,light-valley interactions have attracted attentions in these systems,as the electrical generation of valley magnetization can be readily achieved—a rather different route toward magnetoelectric(ME)effect as compared to that from conventional electron ***,so far,the moiré patterns constructed with twisted bilayer TMDs remain largely unexplored in regard of their valley spin polarizations,even though the symmetry might be distinct from the AB stacked bilayer ***,we study the valley Hall effect(VHE)in 40°-twisted chemical vapor deposition(CVD)grown WS2moiré transistors,using optical Kerr rotation measurements at 20 *** observe a clear gate tunable spatial distribution of the valley carrier imbalance induced by the VHE when a current is exerted in the system.

关键词： transition metal dichalcogenides valleytronic devices light-valley interactions valley Hall effect

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Active beam steering enabled by photonic crystal surface emitting laser

Active beam steering enabled by photonic crystal surface emi...

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2023 Opto-electronics and Communications Conference, OECC 2023

作者： Si, Jiahao Wang, Mingjin Chen, Zihao Xu, Yuanbo Chen, Jingxuan Zhang, Zheng Liu, Wenzhen Peng, Chao Zheng, Wanhua Institute of Semiconductors CAS Laboratory of Solid State Optoelectronics Information Technology Beijing China Institute of Semiconductors CAS Laboratory of Solid State Optoelectronics Information Technology State Key Laboratory on Integrated Optoelectronics Beijing China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics & Frontiers Science Center for Nano-optoelectronics Beijing China Huawei Technologies Co. Ltd. Wuhan China Peng Cheng Laboratory Shenzhen China Institute of Semiconductors CAS College of Future Technology Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Laboratory of Solid State Optoelectronics Information Technology State Key Laboratory on Integrated Optoelectronics Beijing China

A dynamically controlled beam steering photonic crystals surface-emitting laser is proposed in this work. We demonstrate its fast beam steering across a range of 3.2° × 4° in a time scale of 500 nanosec... 详细信息

ISBN: (纸本)9781665462136

关键词： Surface emitting lasers

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