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Science china(physics,Mechanics & Astronomy) 2011年第8期54卷 1411-1415页

作者： FENG xiaoBo li yan QIN Yi xiao {4. yang hong gong qihuang state key laboratory for mesoscopic {4. and department of {4. Peking University Beijing 100871 China

We demonstrate that the femtosecond time-resolved magneto-optical Kerr rotation oscillates with the direction of polarization of the probe beam when a sample of Al0.25Ga0.75As/GaAs multi-quantum wells is excited by a circularly polarized pump and detected by a linearly polarized probe at wavelengths from 800 to 830 nm. Analytical expressions are derived to explain the mechanism, which is in good agreement with the numerical computation and the experimental data. The results suggest that the Kerr signal can be enhanced by choosing an optimal direction of polarization, which is of benefit to the measurement of the weak Kerr rotation.

关键词： time-resolved Kerr rotation spin dynamics direction of polarization

The issues on the commercialization of perovskite solar cells

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Materials Futures

Materials Futures 2024年第2期3卷 1-35页

作者： lixiu Zhang Yousheng Wang Xiangchuan Meng Jia Zhang Pengfei Wu Min Wang Fengren Cao Chunhao Chen Zhaokui Wang Fu yang xiaodong li Yu Zou Xi Jin {4. Jiang Hengyue li Yucheng liu Tongle Bu Buyi {4. Yaowen li Junfeng Fang lixin xiao Junliang yang Fuzhi Huang Shengzhong liu Jizhong Yao liangsheng liao liang li Fei Zhang Yiqiang Zhan Yiwang Chen Yaohua Mai liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632People’s Republic of China Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031People’s Republic of China School of Information Science and Technology Fudan UniversityShanghai 200433People’s Republic of China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072People’s Republic of China School of Physical Science and Technology Soochow UniversitySuzhou 215006People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Institute of optoelectronics Fudan UniversityShanghai 200433People’s Republic of China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123People’s Republic of China School of physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China state key laboratory for Artificial Microstructure and mesoscopic {4. Department of PhysicsPeking UniversityBeijing 100871People’s Republic of China College of Biophotonics South China Normal UniversityGuangzhou 510631People’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of physics and Electronics Central South UniversityChangsha 410083People’s Republic of China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119People’s Republic of China state key laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Microquanta semiconductor Hangzhou 311121People’s Republic of China

Perovskite solar cells have aroused a worldwide research upsurge in recent years due to their soaring photovoltaic performance,ease of solution processing,and low *** power conversion efficiency record is constantly being broken and has recently reached 26.1%in the lab,which is comparable to the established photovoltaic technologies such as crystalline silicon,copper indium gallium selenide and cadmium telluride(CdTe)solar ***,perovskite solar cells are standing at the entrance of industrialization,where huge opportunities and risks ***,towards commercialization,challenges of up-scaling,stability and lead toxicity still remain,the proper handling of which could potentially lead to the widespread adoption of perovskite solar cells as a low-cost and efficient source of renewable *** review gives a holistic analysis of the path towards commercialization for perovskite solar cells.A comprehensive overview of the current state-of-the-art level for perovskite solar cells and modules will be introduced first,with respect to the module efficiency,stability and current status of *** will then discuss the challenges that get in the way of commercialization and the corresponding strategies to address them,involving the upscaling,the stability and the lead toxicity *** into the future direction of commercialization of perovskite photovoltaics was also provided,including the flexible perovskite cells and modules and perovskite indoor ***,the future perspectives towards commercialization are put forward.

关键词： commercializations perovskite solar cells state-of-the-art level challenges and perspectives indoor photovoltaics

A Stable Red Emission in Polymer light-Emitting Diodes based on Phenothiazine Derivative

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A Stable Red Emission in Polymer Light-Emitting Diodes based...

Two-dimensional materials for future information technology: status and prospects

2007亚洲光电子会议LED材料与器件分会场

作者： Huayu Cao a Zhijian Chen a Yingliang liu a Jianghui li b Shaokui Cao b lixin {4. a Shengang Xu b qihuang gong a a state key laboratory for Artificial Microstructures & mesoscopic physics department of physics peking University {14. 100871 PR china b School of Materials Science & Engineering Zhengzhou University Zhengzhou 4.0052 PR china

A novel soluble phenothiazine-based derivative, poly（3, 7-divinylene-N-octyl-phenothiazine 2, 3-diethylquinoxaline-5,8-diyl）（PQDN）, is synthesized for application in red light-emitting diodes. PQDN was characterized by the measurements of cyclic voltammetry （CV）, absorption and photoluminescence （PL） spectra. The band gap （Eg） was determined to be 1.89 eV. The smaller band gap suggested that the polymer is a good candidate for red electroluminescent materials. Polymer light-emitting diodes （PLEDs） with double-layer configuration of indium tin oxide （ITO） / （poly-ethylenedioxythiophene）:poly（styrene sulfonate）（PEDOT:PSS） / PQDN: poly（N-vinylcarbazole）（PVK）（100:0, 80:20, 60:4., and 20:80 wt.%） / Mg:Ag were fabricated. The electroluminescent （EL） property was studied in details. In order to improve the EL performance further, the devices were thermally annealed at 100oC for one hour under the protection of nitrogen. Luminance is increased obviously. EL peak wavelength and the Commision International de L’Eclairage （CIE） coordinates are unaltered and located in red region with the increase of the operating voltages,.

关键词： Phenothiazine red emission electroluminescence

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Science china(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng li Taotao li Wenzhong BAO yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE {4. HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia li Qian li Weisheng li Lei liAO Bilu liU Can liU Chunsen liU Guanyu liU Kaihui liU liwei liU Sheng liU Yuan liU Donglin LU likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-ling REN Haowen SHU litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... School of Electronic Science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications state key laboratory of Infrared physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of physics and key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou laboratory state key laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin laboratory department of Applied physics The Hong Kong Polytechnic University key laboratory for Micro-Nano physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University state key laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National key laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS key laboratory of Nanophotonic Materials and Devices & key laboratory of Nanodevices and App{4.cations i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University key laboratory of Quantum state Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

Atom-referenced and stabilized soliton microcomb

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Science china(physics,Mechanics & Astronomy) 2024年第2期67卷 2-8页

作者： Rui Niu Shuai Wan Tian-Peng Hua Wei-Qiang Wang Zheng-Yu Wang Jin li Zhu-Bo Wang Ming li Zhen Shen Yu Robert Sun Shui-Ming Hu Brent Elittle Sai Tak Chu Wei Zhao Guang-Can Guo Chang-ling Zou Yun-Feng {4. Wen-Fu Zhang Chun-Hua Dong state key laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China CAS key laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum physics University of Science and Technology of ChinaHefei 230026China University of Chinese Academy of Sciences Beijing 100049China department of Chemical physics University of Science and Technology of ChinaHefei 230026China department of physics and Materials Science City University of Hong KongHong Kong 999077China state key laboratory for mesoscopic {4. and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China

For the applications of the frequency comb in microresonators,it is essential to obtain a fully frequency-stabilized microcomb laser *** this study,we present a system for generating a fully atom-referenced stabilized soliton *** pump light around 1560.4. nm is locked to an ultra-low-expansion(ULE)*** pump light is then frequency-doubled and referenced to the atomic transition *** repetition rate of the soliton microcomb is injection-locked to an atomic-clockstabilized radio frequency(RF)source,leading to mHz stabilization at 1 *** a result,all comb lines have been frequencystabilized based on the atomic reference and the ULE cavity,achieving a very high precision of approximately 18 Hz at 1 s,corresponding to the frequency stability of 9.5×10^(-14..Our approach provides a fully stabilized microcomb experiment scheme with no requirement of f-2f technique,which could be easily implemented and generalized to various photonic platforms,thus paving the way towards the ultraprecise optical sources for high precision spectroscopy.

关键词： microcavity frequency comb dissipative Kerr solitons fully stabilized microcomb

Observation of a manifold in the chaotic phase space of an asymmetric optical microcavity

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Photonics Research 2021年第3期9卷 364-369页

作者： yan-Jun QiAN Qi-Tao CAO Shuai Wan Yu-Zhong Gu li-Kun Chen Chun-Hua Dong Qinghai Song qihuang gong Yun-Feng {4. state key laboratory for mesoscopic {4. and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China key laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China department of Electronic and Information Engineering Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055China peking University yangtze Delta Institute of Optoelectronics Nantong 226010China

Chaotic dynamics in optical microcavities, governed dominantly by manifolds, is of great importance for both fundamental studies and photonic applications. Here, we report the experimental observation of a stable manifold characterized by energy and momentum evolution in the nearly chaotic phase space of an asymmetric optical microcavity. By controlling the radius of a fiber coupler and the coupling azimuth of the cavity, corresponding to the momentum and position of the input light, the injected light can in principle excite the system from a desired position in phase space. It is found that once the input light approaches the stable manifold, the angular momentum of the light experiences a rapid increase, and the energy is confined in the cavity for a long ***, the distribution of the stable manifold is visualized by the output power and the coupling depth to high-Q modes extracted from the transmission spectra, which is consistent with theoretical predictions by the ray model. This work opens a new path to understand the chaotic dynamics and reconstruct the complex structure in phase space, providing a new paradigm of manipulating photons in wave chaos.

关键词： manifold chaotic momentum

Photoic crystal nanobeam cavity devices for on-chip integrated silicon photonics

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Journal of Semiconductors 2021年第2期42卷 40-50页

作者： Daquan yang xiao liu xiaogang li Bing Duan Aiqiang Wang yunfeng xiao state key laboratory of Information Photonics and Optical Communications and School of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China state key laboratory for Artificial Microstructure and mesoscopic {4. School of PhysicsPeking UniversityBeijing 100871China Frontiers Science Center for Nano-Optoelectronics&Collaborative Innovation Center of Quantum Matter Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China beijing Academy of Quantum Information Sciences Beijing 100193China

Integrated circuit(IC)industry has fully considered the fact that the Moore’s Law is slowing down or *** solutions are highly and urgently desired to break the physical size limits in the More-than-Moore *** silicon photonics technology exhibits distinguished potential to achieve faster operation speed,less power dissipation,and lower cost in IC industry,because their COMS compatibility,fast response,and high monolithic integration ***,compared with other on-chip resonators(***,2D photonic crystal cavities)silicon-on-insulator(SOI)-based photonic crystal nanobeam cavity(PCNC)has emerged as a promising platform for on-chip integration,due to their attractive properties of ultra-high Q/V,ultra-compact footprints and convenient integration with silicon *** this paper,we present a comprehensive review on recent progress of on-chip PCNC devices for lasing,modulation,switching/filting and label-free sensing,etc.

关键词： PCNC integrated silicon photonics More-than-Moore lab-on-a-chip hybrid devices

Ultralight flexible perovskite solar cells

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Science china Materials 2022年第9期65卷 2319-2324页

作者： Jiang Wu Peng Chen Han Xu Maotao Yu Lei li Haoming yan Yiming Huangfu Yun xiao xiaoyu {4. lichen Zhao Wei Wang qihuang gong Rui Zhu state key laboratory for Artificial Microstructure and mesoscopic {4. School of PhysicsFrontiers Science Center for Nano-optoelectronics&Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China peking University yangtze Delta Institute of Optoelectronics Nantong 226010China School of Integrated Circuits Peking UniversityBeijing 100871China department of physics University of OxfordClarendon LaboratoryParks RoadOxfordOX13PUUK National key laboratory of Science and Technology on Micro/Nano Fabrication Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Ultrathin(thickness less than 10μm)and ultralight flexible perovskite solar cells(FPSCs)have attracted extensive research enthusiasm as power sources for specific potential lightweight applications,such as drones,blimps,weather balloons and ***,there is still a certain gap between the power conversion efficiency(PCE)of ultrathin FPSCs and common *** study demonstrates ultrathin FPSCs on 3-μm-thick parylene-C substrates via a flip-over transferring *** Zr,Ti and Ga-doped indium oxide(ITGZO)film is employed as the bottom transparent electrode of ultrathin inverted FPSCs with a remarkable PCE of 20.2%,which is comparable to that based on common *** on glasses and parylene-F(i.e.,parylene-VT4.substrates were also constructed to verify the advantages of ***,an excellent powerper-weight of 30.3 W g^(-1) is achieved attributed to remarkable PCE and ultrathin-ultralight substrates,demonstrating the great promise of fabricating efficient,ultrathin and ultralight solar cells with parylene-C films.

关键词： flexible perovskite solar cells ultralight power-perweight super-flexible

Optically sizing single atmospheric particulates with a 10-nm resolution using a strong evanescent field

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light(Science & Applications) 2018年第1期7卷 1087-1093页

作者： xiao-Chong Yu yanyan Zhi Shui-Jing Tang Bei-Bei {4. qihuang gong Cheng-Wei Qiu Yun-Feng xiao state key laboratory for mesoscopic {4. and School of {4. Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore NUS Suzhou Research Institute(NUSRI) Suzhou 215123China SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology Shenzhen UniversityShenzhen 518060China

Although an accurate evaluation of the distribution of ultrafine particulate matter in air is of utmost significance to public health,the usually used PM2.5 index fails to provide size distribution *** we demonstrate a low-profile and cavity-free size spectrometer for probing fine and ultrafine particulate matter by using the enhanced particle-perturbed scattering in strong optical evanescent fields of a nanofiber *** unprecedented size resolution reaches 10 nm for detecting single 100-nm-diameter nanoparticles by employing uniform nanofibers and controlling the polarizations of the probe *** size spectrometry was tested and used to retrieve the size distribution of particulate matter in the air of beijing,yielding mass concentrations of nanoparticles,as a secondary exercise,consistent with the officially released *** nanofiber-array probe shows potential for the full monitoring of air pollution and for studying early-stage haze evolution and can be further extended to explore nanoparticle interactions.

关键词： air pollution optical nanofiber single particulates size spectrometer