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Realizing high power factor in p-type BiSbTe flexible thin films via carrier engineering

稀有金属（英文版） 2025年第2期44卷 1222-1230页

作者： Dong-Wei Ao Bo Wu Wei-Di Liu Xiang-Bo Shen Wen-Qing Wei School of Machinery and Automation Weifang UniversityWeifang 261061China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Shenzhen Key Laboratory of Advanced Thin-Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Centre for Materials Science School of Chemistry and PhysicsARC Research Hub in Zero-Emission Power Generation for Carbon NeutralityQueensland University of TechnologyBrisbaneQLD 4000Australia School of Machinery and Automation Weifang UniversityWeifang 261061China

Flexible thermoelectric thin films offer a promising avenue for the development of portable and sustainable flexible power ***,a lack of thin films with excellent performance restricts their application in flexible thermoelectric *** this study,high-per-formance BiSbTe films are successfully prepared using a combination of magnetron sputtering and thermal *** optimizing carrier concentration to～4.47 × 1019 cm-3 and simultaneously realizing high carrier mobility of＞120 cm2·V-1·s-1,an impressive room-temperature power factor of 24.13 μW·cm-1·K-2 is achieved in a Bi0.4Sb1.6Te3 thin *** flexible Bi0.4Sb1.6Te3 thin film also demonstrates excellent bending resistance and stability(ΔR/R0＜5％,ΔS/S0＜5％,andΔS2σ/S02σ0＜10％)after 1000 bending cycles at a mini-mum bending radius of 6 mm.A flexible thin-film ther-moelectric device assembled with p-type Bi0.4Sb1.6Te3 legs achieves a remarkable power output of～82.15 nW and a power density of～547.68 μW·cm-2 under a temperature difference of 20 K.

关键词： Thermoelectric performance Flexible thin film Device BiSbTe

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Deep learning enhanced light sheet fluorescence microscopy for in vivo 4D imaging of zebrafish heart beating

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Light(science & Applications) 2025年第4期14卷 970-983页

作者： Meng Zhang Renjian Li Songnian Fu Sunil Kumar James Mcginty Yuwen Qin Lingling Chen School of Electronic and Information Engineering Beihang UniversityBeijing 100191China College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 51006China Photonics Group Department of PhysicsImperial College LondonLondon SW72AZUK

Time-resolved volumetric fluorescence imaging over an extended duration with high spatial/temporal resolution is a key driving force in biomedical research for investigating spatial-temporal dynamics at organism-level systems,yet it remains a major challenge due to the trade-off among imaging speed,light exposure,illumination power,and image ***,we present a deep-learning enhanced light sheet fluorescence microscopy(LSFM)approach that addresses the restoration of rapid volumetric time-lapse imaging with less than 0.03%light exposure and 3.3%acquisition time compared to a typical standard *** demonstrate that the convolutional neural network(CNN)-transformer network developed here,namely U-net integrated transformer(UI-Trans),successfully achieves the mitigation of complex noise-scattering-coupled degradation and outperforms state-of-the-art deep learning networks,due to its capability of faithfully learning fine details while comprehending complex global *** the fast generation of appropriate training data via flexible switching between confocal line-scanning LSFM(LS-LSFM)and conventional LSFM,this method achieves a three-to five-fold signal-to-noise ratio(SNR)improvement and~1.8 times contrast improvement in ex vivo zebrafish heart imaging and long-term in vivo 4D(3D morphology+time)imaging of heartbeat dynamics at different developmental stages with ultra-economical acquisitions in terms of light dosage and acquisition time.

关键词： deep learning light sheet fluorescence microscopy lsfm approach zebrafish heart beating light sheet fluorescence microscopy spatial temporal dynamics imaging speed vivo D imaging time resolved volumetric fluorescence imaging

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A model for fast electron-driven high-density plasma in the double-cone ignition scheme

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Chinese physics B 2024年第11期33卷 322-330页

作者： Zhong-Yi Chen Kai-Ge Zhao Ying-Jun Li School of Science China University of Mining and TechnologyBeijing 100083China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Intense Laser Application Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China State Key Laboratory for Tunnel Engineering China University of Mining and TechnologyBeijing 100083China

A model for fast electron-driven high-density plasma is proposed to describe the effect of injected fast electrons on the temperature and inner pressure of the plasma in the fast heating process of the double-cone ignition(DCI)*** to the collision of the two low-density plasmas,the density and volume of the high-density plasma ***,the ignition temperature and energy requirement of the high-density plasma vary at different moments,and the required energy for hot electrons to heat the plasma also *** practical experiments,the energy input of hot electrons needs to be *** reduce the energy input of hot electrons,the optimal moment and the shortest time for injecting hot electrons with minimum energy are *** this paper,it is proposed to inject hot electrons for a short time to heat the high-density plasma to a relatively high ***,the alpha particles with the high heating rate and PdV work heat the plasma to the ignition temperature,further reducing the energy required to inject hot *** study of the injection time of fast electrons can reduce the energy requirement of fast electrons for the high-density plasma and increase the probability of successful ignition of the high-density plasma.

关键词： fast electrons the high-density plasma alpha particles double-cone ignition scheme the optimal moment the shortest time

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Large area crystalline Weyl semimetal with nano Au film based micro-fold line array for THz detector

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science China(Technological sciences) 2023年第11期66卷 3267-3275页

作者： SONG Qi ZHOU Yu JIA ErSe WANG JiaTong ZHANG Min ZHANG BingYuan Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng UniversityLiaocheng 252059China North China Institute of Computing Technology Beijing 100083China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China School of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

The advancement of 6G technology relies on the development of high-performance terahertz detectors that can operate at room *** detectors are crucial for Internet of Things(Io T)applications,which require sensitive environmental sensing and efficient reception of 6G *** significant research focus is on detection technology with high responsiveness and low equivalent noise power for 6G signals,which experience high losses in the *** meet the demand for ultra-sensitive detectors in 6G technology,we have employed several ***,we prepared a large area of Weyl-semimetal layer through magnetron ***,we obtained a high-quality Weyl-semimetal active layer by carefully controlling the annealing ***,a thin nano-Au layer was introduced as a micro-cavity reflection layer to enhance the device's detection ***,we incorporated an electromagnetic induction well to improve carrier confinement and enhance the detection *** proposed high-performance terahertz detector,with its potential for industrial production,offers a valuable technical solution for the advancement of 6G technology.

关键词： micro-cavity Weyl semimetal crystalline thin film THz device

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Electronegativity-Induced Single-Ion Conducting Polymer Electrolyte for Solid-State Lithium Batteries

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Energy & Environmental Materials 2023年第4期6卷 40-48页

作者： Tianyi Hou Yumin Qian Dinggen Li Bo Xu Zhenyu Huang Xueting Liu Haonan Wang Bowen Jiang Henghui Xu Yunhui Huang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement Ministry of EducationSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Jiangsu Jitri-Hust Intelligent Equipment Technology Nanjing 210000China

The application of solid polymer electrolytes(SPEs)is severely impeded by the insufficient ionic conductivity and low Li^(+)transference numbers(t_(Li)^(+)).Here,we report an iodine-driven strategy to address both the two longstanding issues of SPEs *** lodine-containing groups introduced on polymer chains effectively attract Li^(+)ions,facilitate Li^(+)transport,and promote the dissociation of Li ***,iodine is also favorable to alleviate the strong O-Li^(+)coordination through a Lewis acidbase interaction,further improving the ionic conductivity and t_(Li)^(+).As a proof of concept,an iodinated single-ion conducting polymer electrolyte(IPE)demonstrates a high ionic conductivity of 0.93 mS cm^(-1)and a high t_(Li)^(+)of 0.86 at 25℃,which is among the best results ever reported for ***,symmetric Li/Li cells with IPE achieve a long-term stability over 2600 h through the in-situ formed LiF-rich *** a result,Li-S battery with IPE maintains a high capacity of 623.7 mAh g^(-1)over 300 cycles with an average Coulombic efficiency of 99%.When matched with intercalation cathode chemistries,Li/IPE/LiFePO_(4)and Li/IPE/LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)solid-state batteries also deliver high-capacity retentions of 95%and 97%at 0.2 C after 120 cycles,respectively.

关键词： iodine lithium polymer electrolytes single-ion conducting solid-state batteries

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Computational temporal ghost imaging based on complementary modulation

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Chinese physics B 2024年第11期33卷 278-283页

作者： Jia-Wei Li Wei Zhang Xue-Feng Liu Xu-Ri Yao Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE) School of Physics Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

We report an experimental demonstration of temporal ghost imaging in which a digital micromirror device(DMD)and+1/-1 binary modulation have been combined to give an accurate reconstruction of a nonperiodic time *** to the 0/1 modulation,the reconstruction signal can be improved greatly by+1/-1 binary modulation even with half of the *** results show that 0/1 binary temporal objects up to 4 kHz and sinusoidal time objects up to 1 kHz can be reconstructed by this *** influences of modulation speed and array detector gray levels are also discussed.

关键词： temporal ghost imaging complementary modulation

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Coulomb focusing in attosecond angular streaking

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Light(science & Applications) 2024年第11期13卷 2611-2619页

作者： Xiaokai Li Xiwang Liu Chuncheng Wang Shuai Ben Shengpeng Zhou Yizhang Yang Xiaohong Song Jing Chen Weifeng Yang Dajun Ding Institute of Atomic and Molecular Physics and Advanced Light Field and Modern Medical Treatment Science and Technology Innovation Center of Jilin ProvinceJilin UniversityChangchun 130012China School of Physics and Optoelectronic Engineering Hainan UniversityHaikou 570228China Hefei National Laboratory and Hefei National Research Center for Physical Sciences at the Microscale and School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China Center for Theoretical Physics Hainan UniversityHaikou 570228China

Angular streaking technique employs a close-to-circularly polarized laser pulse to build a mapping between the instant of maximum ionization and the most probable emission angle in the photoelectron momentum distribution,thereby enabling the probe of laser-induced electron dynamics in atoms and molecules with attosecond temporal ***,through the jointed experimental observations and improved Coulombcorrected strong-field approximation statistical simulations,we identify that electrons emitted at different initial ionization times converge to the most probable emission angle due to the previously-unexpected Coulomb focusing triggered by the nonadiabatic laser-induced electron *** reveal that the Coulomb focusing induces the observed nonintuitive energy-dependent trend in the angular streaking measurements on the nonadiabatic tunneling,and that tunneling dynamics under the classically forbidden barrier can leave fingerprints on the resulting *** findings have significant implications for the decoding of the intricate tunneling dynamics with attosecond angular streaking.

关键词： angular tunneling thereby

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Ultrasonic scalpel based on fusiform phononic crystal structure

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Chinese physics B 2024年第10期33卷 302-310页

作者： Sha Wang Junjie Shan Shuyu Lin Ocean College Jiangsu University of Science and TechnologyZhenjiang 212100China Shaanxi Key Laboratory of Ultrasonics School of Physics and Information TechnologyShaanxi Normal UniversityXi’an 710119China National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

In response to the ultrasonic scalpels with the vibrational modal coupling which leads to a decrease in efficiency,an ultrasonic scalpel based on fusiform phononic crystals(PnCs)is *** accurate theoretical model is constructed,which is mainly composed of electromechanical equivalent circuit models to analyze the frequency response function and the frequency response curves of the *** band gaps exist in the fusiform PnCs owing to the periodic constraint,which can suppress the corresponding vibrational *** vibration characteristics(vibration mode,frequency,and displacement distribution)of the ultrasonic scalpel are analyzed,and the validity of the electromechanical equivalent circuit method is *** results indicate that other vibration modes near the working frequency can be *** addition,blades based on fusiform PnCs have a function akin to that of the horn,which enables displacement amplification.

关键词： phononic crystals ultrasonic scalpel bandgap vibration characteristics

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Study on the change of structure and optical properties of DLC thin films by mixed gas method 4

Study on the change of structure and optical properties of D...

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4th International Conference on Optics and Image Processing, ICOIP 2024

作者： Fu, Junwen Pan, Shang Lan, Yang Zheng, Tiantai Yang, Xiaolong Hu, Xinyue Liang, Ming Changchun College of Electronic Technology School of Optoelectronic Science and Engineering JiLin Changchun130061 China Changchun University of Science and Technology School of Physics JiLin Changchun130022 China

ISBN: (纸本)9781510682481

DLC (diamond-like carbon) films have excellent optical properties, especially in the mid-infrared band (8-14 micron). Because of the adjustable refractive index in a certain range, it can be matched with more infrared materials, which is a hot research topic in infrared optics. In this paper, the effects of technological parameters and mixed gases (H2 and Ar) on the structure and properties of DLC films were studied. The results show that the process parameters can change the structure of the film, so that some properties of the film can be changed accordingly, but DLC films with high thermal stability and low internal stress can not be obtained simultaneously. When other gases are mixed in the reaction source gas, the structure and properties of the film will change, which is mainly due to the different role of the introduced gas in the film deposition process. © 2024 SPIE.

关键词： Diamond like carbon films

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Dielectric metamaterials with effective self-duality and full-polarization omnidirectional brewster effect

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Light(science & Applications) 2024年第11期13卷 2680-2687页

作者： Hao Luo Jie Luo Zhihui Zhang Chao Wu Quan Li Wei Liu Ruwen Peng Mu Wang Hongqiang Li Yun Lai National Laboratory of Solid State Microstructures School of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Physical Science and Technology&Jiangsu key Laboratory of Frontier Material Physics and Devices Soochow UniversitySuzhou 215006China School of Physics Science and Engineering Tongji UniversityShanghai 200092China College of Electronic and Information Engineering Tongji UniversityShanghai 200092China College for Advanced Interdisciplinary Studies National University of Defense TechnologyChangshaHunan 410073China

Conventional dielectric solid materials,both natural and artifcial,lack electromagnetic self-duality and thus require additional coatings to achieve impedance matching with free ***,we present a class of dielectric metamaterials that are effectively self-dual and vacuum-like,thereby exhibiting full-polarization omnidirectional impedance matching as an unusual Brewster effect extended across all incident angles and *** both birefringence and reflection eliminated regardless of wavefront and polarization,such anisotropic metamaterials could establish the electromagnetic equivalence with"stretched free space"in transformation optics,as substantiated through full-wave simulations and microwave *** findings open a practical pathway for realizing unprecedented polarization-independence and omnidirectional impedance-matching characteristics in pure dielectric solids.

关键词： directional duality dielectric

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