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Science China(physics,Mechanics & Astronomy) 2023年第2期66卷 102-108页

作者： Qi-Jun Ye Xin-Zheng Li State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontier Science Center for Nano-optoelectronics and School of PhysicsPeking UniversityBeijing 100871China Interdisciplinary Institute of Light-Element Quantum Materials Research Center for Light-Element Advanced Materialsand Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Thermodynamic conventions suffer from describing dynamical distinctions,especially when the structural and energetic changes induced by rare events are *** using the ensemble theory in the trajectory space,we present a statistical approach to address this *** than spatial particle-particle interaction which dominates thermodynamics,the temporal correlation of events dominates the *** zeros of dynamic partition function mark phase transitions in the space-time,i.e.,dynamic phase transition(DPT),as Yang and Lee formulate traditional phase transitions,and hence determine dynamic phases on both sides of the *** to the role of temperature(pressure) as thermal(mechanical) potential,we interpret the controlling variable of DPT,i.e., dynamic field,as the dynamical *** findings offer possibility towards a unified picture of phase and phase transition.

关键词： transition phase transition

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Self-suppressed quantum diffusion of microresonator solitons

Self-suppressed quantum diffusion of microresonator solitons

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2023 Optica Nonlinear Optics Topical Meeting, NLO 2023

作者： Jin, Xing Lv, Zhe Yang, Qi-Fan State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Beijing100871 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China

ISBN: (纸本)9781957171234

We theoretically investigate the quantum-induced Brownian motion of dissipative Kerr solitons in multi-mode microresonators. The dispersive-wave radiation is found to modify the effective viscosity, reducing the diffusion rate by up to 19 dB. Optica Nonlinear Optics Topical Meeting 2023 © Optica Publishing Group 2023 © 2023 The Author(s)

关键词： Microresonators

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Back-contact configuration energizes perovskite photovoltaic modules

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Nano Research Energy 2024年第2期3卷 7-11页

作者： Xiaoyu Yang Yongguang Tu Fengjun Ye Zheng Bao State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Frontiers Science Center for Flexible Electronics(FSCFE) Xi’an Institute of Flexible Electronics(IFE)&Xi’an Institute of Biomedical Materials and Engineering(IBME)Northwestern Polytechnical University Xi’anShaanxi 710072China Beijing Solarverse Optoelectronic Technology Co. Ltd.Beijing 100176China

In this viewpoint,recent hot topics in the photovoltaic community,interdigitated back contact(IBC)cells,are systematically reviewed from the view of device *** categories of IBC designs on the most popular perovskite solar cells(PSCs)were discussed,and a planar back-contact perovskite module was first *** device configuration,fabrication methods,working mechanism,optimization strategies,and future development directions of this novel PSC module were put forward to show its superiorities in the module performance,processing difficulty,and extensible functionality among present perovskite modules,presenting promising potential to improve the competitiveness of perovskite technology in the photovoltaic market.

关键词： perovskite solar cell back-contact photovoltaic technology device configuration

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An integrated photocatalytic redox architecture for simultaneous overall conversion of CO_(2)and H_(2)O toward CH_(4)and H_(2)O_(2)

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Science Bulletin 2025年第3期70卷 373-382页

作者： Muhammad Salman Nasir Bowen Sheng Ying Zhao Haotian Ye Jun Song Jinglin Li Ping Wang Tao Wang Xinqiang Wang Zhen Huang Baowen Zhou Key Laboratory for Power Machinery and Engineering of Ministry of Education Research Center for Renewable Synthetic FuelSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsNano-Optoelectronics Frontier Center of Ministry of Education(NFC-MOE)Peking UniversityBeijing 100871China Department of Mining and Materials Engineering McGill UniversityMontrealH3A 0G4Canada Electron Microscopy Laboratory School of PhysicsPeking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Collaborative Innovation Center of Quantum Matter School of PhysicsPeking UniversityBeijing 100871China

Solar-driven overall conversion of CO_(2)and H_(2)O into fuels and chemicals shows an ultimate strategy for carbon neutrality yet remains a huge ***,an integrated photocatalytic redox architecture of Zn NPs/GaN Nanowires(NWs)/Si is explored for light-driven overall conversion of CO_(2)and H_(2)O into CH_(4)and H_(2)O_(2)simultaneously without any external sacrificial agents and *** as-designed architecture affords a benchmark CH_(4)activity of 189 mmol gcat^(-1)h^(-1)with a high selectivity of 93.6%,in the synchronized formation of H_(2)O_(2)at a considerable rate of 25 m g^(-1)h^(-1).Moreover,a considerable turnover number of 27,280 mol CH_(4)per mol Zn was achieved over a long-term operation of 80 *** operando spectroscopic characterizations,isotope experiments,and density functional theory calculations,it is unraveled that Zn sites are synergetic with GaN to drive CO_(2)-to-CH_(4)conversion with a lowered energy barrier of 0.27 eV while inhibiting hydrogen evolution reaction with a relatively high energy barrier of 0.93 ***,owing to the unique surface properties of GaN,water is split into*OH and*H,followed by the formation of H_(2)O_(2)because of the alleviated adsorption strength of*OH by Zn ***,the hierarchical architecture enables the achievement of high activity and high selectivity of CH_(4)from CO_(2)reduction in distilled water along with the generation of H_(2)O_(2).This work provides an integrated photocatalytic redox architecture for the synchronized production of CH_(4)and H_(2)O_(2)with the only inputs of CO_(2),distilled water,and light.

关键词： Zn nanoparticles GaN nanowires/Si Integrated redox architecture artificial photosynthesis CH_(4)and H_(2)0_(2)

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Colloidal II-VI nanoplatelets for optoelectronic devices:Progress and perspectives

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Nano Research 2024年第12期17卷 10412-10425页

作者： An Hu Li Ma Xiaoyu Yang Yige Yao Yunke Zhu Jingjing Qiu Shuang Wang Changjun Lu Yunan Gao Leyard Optoelectronic Co. LtdBeijing 100091China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Assessment for Basic Education Quality Beijing Normal UniversityBeijing 100875China Frontiers Science Center for Nano-optoelectronics Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Colloidal II-VI nanoplatelets(NPLs)are solution-processable two-dimensional(2D)quantum dots that have vast potential in highperformance optoelectronic applications,including light-emitting diodes,sensors,and *** properties,such as ultrapure emission,giant oscillator strength transition,and directional dipoles,have been demonstrated in these NPLs,which can improve the efficiency of light-emitting diodes and lower the threshold of *** this review,we present an overview of the current progress and propose perspectives on the most well-studied II-VI NPLs that are suitable for the optoelectronic *** emphasize that the control of the symmetrical shell growth of NPLs is critical for the practical utilization of the advantages of NPLs in these devices.

关键词： nanoplatelets quantum wells colloidal quantum dots light-emitting diodes

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The evolution of chemical ordering and property in Fe1+xSe2 upon intercalation ratios

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国家科学评论（英文版） 2025年第2期12卷 159-170页

作者： Zijing Zhao Xiaocang Han Shengcai Zhu Zhi Fang Ziyi Han Zhongyu Liang Bailing Li Biao Zhang Wei Li Zhaochu Luo Licong Peng Xiaoxu Zhao Xiangguo Li Jiadong Zhou Song Gao Chengxin Wang Mathias Kläui Yanglong Hou School of Materials Science and Engineering Beijing Key Laboratory for Magnetoelectric Materials and DevicesPeking UniversityBeijing 100871China School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China School of Physics and Optoelectronic Engineering Beijing University of TechnologyBeijing 100124China School of Materials Science and Engineering Beijing Key Laboratory for Magnetoelectric Materials and DevicesPeking UniversityBeijing 100871China School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China State Key Laboratory for Artificial Microstructure& Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Institute of Physics Johannes Gutenberg University MainzMainz 55128Germany School of Materials Science and Engineering Beijing Key Laboratory for Magnetoelectric Materials and DevicesPeking UniversityBeijing 100871China School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China

Intercalation has been considered as an effective method to explore innovative two-dimensional(2D)materials and modify their ***,the relationship between intercalation concentration,structure,and property remains a largely uncharted territory,and the controllable synthesis of desired intercalated phases faces ***,a general intercalated rule for the effect of self-intercalation ratio on atomic arrangements is ***,the controllable synthesis of a series of Fe-intercalated 2D materials is *** transmission electron microscopy illustrates that their intercalation structures undergo disordered/ordered/half-ordered/ordered transformation,which confirms the intercalated rule and proposes a new structure termed half-ordered ***,their magnetic and electrical properties can be significantly modulated by *** intercalated nanoflakes possess room-temperature magnetism with composition-regulated magnetic ***,Fe1.5Se2 and Fe1.6Se2 are scarce half-metallic materials showing different magneto-resistance *** work would guide the design and synthesis of new intercalated materials,and deepen the understanding of the relationship between structure and properties.

关键词： intercalation Fe-intercalated 2D materials room-temperature magnetism

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Lateral quantum confinement regulates charge carrier transfer and biexciton interaction in CdSe/CdSeS core/crown nanoplatelets

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Nano Research 2023年第7期16卷 10420-10428页

作者： Yige Yao Xiaotian Bao Yunke Zhu Xinyu Sui An Hu Peng Bai Shufeng Wang Hong Yang Xinfeng Liu Yunan Gao State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Frontiers Science Center for Nano-optoelectronics Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Dalian National Laboratory for Clean Energy Dalian 116023China

Charge carrier dynamics essentially determines the performance of various optoelectronic applications of colloidal semiconductor *** them,two-dimensional nanoplatelets provide new adjustment freedom for their unique core/crown ***,we demonstrate that by fine-tuning the core size and the lateral quantum confinement,the charge carrier transfer rate from the crown to the core can be varied by one order of magnitude in CdSe/CdSeS core/alloy-crown *** addition,the transfer can be affected by a carrier blocking mechanism,i.e.,the filled carriers hinder further possible ***,we found that the biexciton interaction is oppositely affected by quantum confinement and electron delocalization,resulting in a non-monotonic variation of the biexciton binding energy with the emission *** work provides new observations and insights into the charge carrier transfer dynamics and exciton interactions in colloidal nanoplatelets and will promote their further applications in lasing,display,sensing,etc.

关键词： nanoplatelets core/crown charge carrier transfer ultrafast spectroscopy biexciton

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Utilization of far-red LED to minimize blue light hazard for dynamic semiconductor lighting

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Journal of the Illuminating Engineering Society 2023年第1期19卷 53-70页

作者： Jingxin Nie Zhizhong Chen Fei Jiao Yifan Chen Jinglin Zhan Yiyong Chen Zuojian Pan Xiangning Kang Yongzhi Wang Qi Wang Weimin Dang Wentian Dong Shuzhe Zhou Xin Yu Yuzhen Tong Guoyi Zhang Bo Shen a State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing China a State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing Chinab State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing China c Dongguan Institute of Optoelectronics Peking University Dongguan Guangdong China d Peking University Sixth Hospital Peking University Institute of Mental Health Key Laboratory of Mental Health Ministry of Health (Peking University) Beijing China a State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing Chinae Research Center for Wide Bandgap Semiconductor of Pku Gao’an Jiangxi China a State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing Chinac Dongguan Institute of Optoelectronics Peking University Dongguan Guangdong China

ABSTRACTABSTRACTThe blue light hazard (BLH) and luminous efficacy of a source (ηV) are associated with the photobiological safety and energy saving of light-emitting diodes (LEDs), respectively. In this study, we used genetic algorithm (GA) to optimize the BLH,ηV, and color rendering parameters of five-chip hybrid white LEDs. Based on the optimal results, we used five-chip LEDs to obtain the hybrid white light. Their peak wavelengths were 461.5 (blue), 523.9 (green), 588.2 (orange), 643.3 (red), and 694.2 nm (far-red), respectively. In practice, the blue light hazard efficiency of radiation (BLHER) of the hybrid white light was less than 0.10, which was lower than half of the most common light sources. TheηVranged from 51.6 to 115.6 lm/W at correlated color temperature (CCT) from 2700 to 6500 K. On average, the CIE general color rendering index (Ra), CIE special color rendering index for the ninth deep red test sample (R9), ANSI/IES TM-30 color fidelity index (Rf), and color gamut index (Rg) of hybrid white light were 91.3, 87.8, 83.3, and 96.7, respectively. The melanopic efficacy of luminous radiation (Kmel,V) was tunable in the range of 0.60 to 1.35 mW/lm. These results demonstrated that we used far-red LEDs to fabricate white light with low BLH and relatively high efficiency.

关键词： Blue light hazard luminous efficacy light-emitting diode multi-chip color mixing

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Self-Suppressed Quantum-Limited Timing Jitter and Fundamental Noise Limit of Soliton Microcombs

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Physical Review Letters 2024年第7期133卷 073801-073801页

作者： Xing Jin Zhe Lv Lu Yao Qihuang Gong Qi-Fan Yang State Key Laboratory for Artificial Microstructure and Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Collaborative Innovation Center of Extreme Optics Yangtze Delta Institute of Optoelectronics Nantong Jiangsu 226010 China

Quantum-limited timing jitter of soliton microcombs has long been recognized as their fundamental noise limit. Here, we surpass such limit by utilizing dispersive wave dynamics in multimode microresonators. Through the viscous force provided by these dispersive waves, the quantum-limited timing jitter can be suppressed to a much lower level that forms the ultimate fundamental noise limit of soliton microcombs. Our findings enable coherence engineering of soliton microcombs in the quantum regime, providing critical guidelines for using soliton microcombs to synthesize ultralow-noise microwave and optical signals.

关键词： Nonlinear optics Optical solitons Photonics

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Microresonator-based optical frequency division for ultralow-noise microwave synthesis

Microresonator-based optical frequency division for ultralow...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Jin, Xing Xie, Zhenyu Hou, Hanfei Zhang, Fangxing Zhang, Xuanyi Gong, Qihuang Yang, Qi-Fan State Key Laboratory for Artificial Microstructure and Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics School of Physics Peking University Beijing100871 China Peking University Yangtze Delta Institute of Optoelectronics Jiangsu Nantong226010 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China

Utilizing a MgF2 microresonator as optical reference and a Si3N4 microresonator as comb generator, we synthesize ultralow-noise 25-GHz rate microwave with -141 dBc/Hz phase noise at 10 kHz offset frequency via optical... 详细信息

ISBN: (纸本)9781957171395

关键词： Microcavities

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