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Long-range adsorbate interactions mediated by two-dimensional Dirac fermions

Chinese physics B 2023年第5期32卷 596-603页

作者：王晓慧付振国王志刚迟锋张平 Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum-BeijingBeijing 102249China Institute of Applied Physics and Computational Mathematics Beijing 100088China School of Electronic and Information Engineering University of Electronic Science and Technology of ChinaZhongshan InstituteZhongshan 528400China School of Physics and Physical Engineering Qufu Normal UniversityQufu 273165China

We provide here an analytical formalism to describe the indirect interaction between adsorbed atom or molecule pairs mediated by two-dimensional(2D)Dirac *** show that in contrast to the case of traditional 2D electron gas,in the 2D Dirac system,the long-range interaction behaves as 1/r^(3) decaying Friedel *** analytical formalism is fully consistent with a tight-binding numerical calculation of honeycomb *** formalism is suitable for the realistic 2D Dirac materials,such as graphene and surface states of three-dimensional topological insulators.

关键词： graphene Green's function Dirac fermions

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3D free-assembly modular microfluidics inspired by movable type printing

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Microsystems & Nanoengineering 2023年第5期9卷 191-201页

作者： Shaoqi Huang Jiandong Wu Lulu Zheng Yan Long Junyi Chen Jianlang Li Bo Dai Francis Lin Songlin Zhuang Dawei Zhang Engineering Research Center of Optical Instrument and System the Ministry of EducationShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Physics and Astronomy University of ManitobaWinnipegMB R3T 2N2Canada

Reconfigurable modular microfluidics presents an opportunity for flexibly constructing prototypes of advanced microfluidic ***,the strategy of directly integrating modules cannot easily fulfill the requirements of common applications,e.g.,the incorporation of materials with biochemical compatibility and optical transparency and the execution of small batch production of disposable chips for laboratory trials and initial ***,we propose a manufacturing scheme inspired by the movable type printing technique to realize 3D free-assembly modular ***-layer 3D microfluidic structures can be produced by replicating the assembled molds.A library of modularized molds is presented for flow control,droplet generation and manipulation and cell trapping and *** addition,a variety of modularized attachments,including valves,light sources and microscopic cameras,have been developed with the capability to be mounted onto chips on *** systems,including those for concentration gradient generation,droplet-based microfluidics,cell trapping and drug screening,are *** scheme enables rapid prototyping of microfluidic systems and construction of on-chip research platforms,with the intent of achieving high efficiency of proof-of-concept tests and small batch manufacturing.

关键词： batch proof mounted

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optical two-dimensional coherent spectroscopy of excitons in transition-metal dichalcogenides

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Frontiers of physics 2024年第2期19卷 141-148页

作者： YanZuo Chen ShaoGang Yu Tao Jiang XiaoJun Liu XinBin Cheng Di Huang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China MOE Key Laboratory of Advanced Micro-Structured Materials Shanghai Frontiers Science Center of Digital OpticsInstitute of Precision Optical Engineeringand School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China

Exciton physics in atomically thin transition-metal dichalcogenides(TMDCs)holds paramount importance for fundamental physics research and prospective ***,the experimental exploration of exciton physics,including excitonic coherence dynamics,exciton many-body interactions,and their optical properties,faces challenges stemming from factors such as spatial heterogeneity and intricate many-body *** this perspective,we elaborate upon how optical two-dimensional coherent spectroscopy(2DCS)emerges as an effective tool to tackle the challenges,and outline potential directions for gaining deeper insights into exciton physics in forthcoming experiments with the advancements in 2DCS techniques and new materials.

关键词： monolayer transition-metal dichalcogenides two-dimensional coherent spectroscopy

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Low-bias,high-photoresponsivity SnSe2 nanofilm with an Au split-ring array-based THz detector toward 6G communication

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Science China(Information Sciences) 2023年第6期66卷 311-312页

作者： Qi SONG Zhiwen ZHOU Yifei XU Min ZHANG Junbo YANG Huawei LIANG Tianwu WANG Peiguang YAN College of Physics and Optoelectronic Engineering Shenzhen University Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng University College of Liberal Arts and Sciences National University of Defense Technology GBA Research Institute Aerospace Information Research Institute of Chinese Academy of Science

6G technology with the four characteristics of an intelligent endogenous,secure endogenous,multi-domain convergence,and integrated computing network,will help society toward an intelligent era [1]. The low power consumption and high photoresponsivity of 6G core devices,and particularly the improvement of detector performance,

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Microscale insight into the proton concentration during electrolytic reaction via an optical microfiber:potential for microcurrent monitoring by a dielectric probe

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Light(Science & Applications) 2025年第3期14卷 767-788页

作者： Yunyun Huang Jjaxuan Liang Haotian Wu Pengwei Chen Aoxiang Xiao Bai-Ou Guan Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou511143China College of Physics&Optoelectronic Engineering Jinan UniversityGuangzhou510632China

Local microcurrent monitoring is of great significance for biological and battery systems,yet it poses a formidable *** current measurement techniques rely on electromagnetic materials which inevitably introduce interference to the system under *** address this issue,a promising approach based on a dielectric fiberoptic sensor is *** microfiber is capable of detecting microcurrent through monitoring the localized proton concentration signal with a pH resolution of 0.0052 pH *** sensing the refractive index variation surrounding the sensor induced by the interaction between local proton concentration changes and oxidizer-treated microfiber surface through the evanescent field,this sensing mechanism effectively avoids the interference of the electromagnetic material on the performance of the tested *** sensor exhibits a limit of detection for microcurrent of 1μ*** sensing region is a microfiber with a diameter of 8.8μ*** can get invaluable information that cannot be obtained through conventional electrochemical *** include photocurrent attenuation in photogenerated carrier materials during illumination,electrical activation in nerve cells,and fluctuations in the efficiency of electrical energy generation during battery *** approach provides a powerful complement to electrochemical methods for the elucidation of microscale reaction *** information provided by the prepared dielectric fiber-optic sensor will shed more light on proton kinetics and electrochemical and electrobiological mechanisms,which may fll an important gap in the current bioelectricity and battery monitoring methods.

关键词： dielectric fiberoptic sensor measurement techniques microfiber dielectric probe local microcurrent monitoring detecting microcurrent electromagnetic materials biological battery systemsyet

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Suppressed concentration quenching and tunable photoluminescence in Eu^(2+)-activated Rb_(3)Y(PO_(4))_(2) phosphors for full-spectrum lighting

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Light(Science & Applications) 2024年第11期13卷 2688-2698页

作者： Ming Zhao Yeping Ge Yurong Li Xiaoyan Song Zhiguo Xia Xinping Zhang Institute of Information Photonics Technology School of Physics and Optoelectronic EngineeringBeijing University of TechnologyBeijing 10083China College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 10083China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesGuangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesSchool of Physics and OptoelectronicsSouth China University of TechnologyGuangzhou 510641China

Highly efficient inorganic phosphors are desirable for lighting-emitting diode light sources,and increasing the doping concentration of activators is a common approach for enhancing the photoluminescence quantum yield(PLQY).However,the constraint of concentration quenching poses a great challenge for improving the ***,we propose a fundamental design principle by separating activators and prolonging their distance in Eu^(2+)-activated Rb_(3)Y(PO_(4))_(2)phosphors to inhibit concentration quenching,in which different quenching rates are controlled by the Eu distribution at various crystallographic *** blue-violet-emitting Rb_(3)Y(PO_(4))2:xEu(x=0.1%–15%)phosphors,with the occupation of Rb1,Rb2 and Y sites by Eu^(2+),exhibit rapid luminescence quenching with optimum external PLQY of 10%due to multi-channel energy ***,as the Eu concentration increases above 20%,Eu^(2+)prefer to occupy the Rb1 and Y sites with separated polyhedra and large interionic distances,resulting in green emission with suppressed concentration quenching,achieving an improved external PLQY of 41%.Our study provides a unique design perspective for elevating the efficiency of Eu^(2+)-activated phosphors toward high-performance inorganic luminescent materials for full-spectrum lighting.

关键词： quenching lighting concentration

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Brillouin Klein space and half-turn space in three-dimensional acoustic crystals

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Science Bulletin 2024年第13期69卷 2050-2058页

作者： Zhenxiao Zhu Linyun Yang Jien Wu Yan Meng Xiang Xi Bei Yan Jingming Chen Jiuyang Lu Xueqin Huang Weiyin Deng Ce Shang Perry Ping Shum Yihao Yang Hongsheng Chen Kexin Xiang Gui-Geng Liu Zhengyou Liu Zhen Gao State Key Laboratory of Optical Fiber and Cable Manufacture Technology Department of Electronic and Electrical EngineeringSouthern University of Science and TechnologyShenzhen 518055China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education and School of Physics and Technology Wuhan UniversityWuhan 430072China King Abdullah University of Science and Technology(KAUST) Physical Science and Engineering Division(PSE)Thuwal 23955-6900Saudi Arabia Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Science and Technology Innovation CenterCollege of Information Science and Electronic EngineeringZJU-UIUC InstituteZhejiang UniversityHangzhou 310027China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Institute for Advanced Studies Wuhan UniversityWuhan 430072China

The Bloch band theory and Brillouin zone(BZ)that characterize wave-like behaviors in periodic mediums are two cornerstones of contemporary physics,ranging from condensed matter to topological *** theoretical breakthrough revealed that,under the projective symmetry algebra enforced by artificial gauge fields,the usual two-dimensional(2D)BZ(orientable Brillouin two-torus)can be fundamentally modified to a non-orientable Brillouin Klein bottle with radically distinct manifold ***,the physical consequence of artificial gauge fields on the more general three-dimensional(3D)BZ(orientable Brillouin three-torus)was so far ***,we theoretically discovered and experimentally observed that the fundamental domain and topology of the usual 3D BZ can be reduced to a non-orientable Brillouin Klein space or an orientable Brillouin half-turn space in a 3D acoustic crystal with artificial gauge *** experimentally identify peculiar 3D momentum-space non-symmorphic screw rotation and glide reflection symmetries in the measured band ***,we experimentally demonstrate a novel stacked weak Klein bottle insulator featuring a nonzero Z2 topological invariant and self-collimated topological surface states at two opposite surfaces related by a nonlocal twist,radically distinct from all previous 3D topological *** discovery not only fundamentally modifies the fundamental domain and topology of 3D BZ,but also opens the door towards a wealth of previously overlooked momentum-space multidimensional manifold topologies and novel gaugesymmetry-enriched topological physics and robust acoustic wave manipulations beyond the existing paradigms.

关键词： Momentum-space non-symmorphic symmetry Brillouin Klein space and half-turn space Acoustic Klein bottle insulator Self-collimated topological surface states

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On-chip multidimensional(de)multiplexer utilizing adiabatic structure-connected micro-ring resonators

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Science China(physics,Mechanics & Astronomy) 2025年第5期68卷 135-142页

作者： Zhiwei Guan Keyin Wen Chuangxin Xie Ruixue Dou Tianyimei Zuo Junmin Liu Huapeng Ye Chaofeng Wang Ze Dong Dianyuan Fan Shuqing Chen Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China College of Physics and Engineering Technology Minzu Normal University of XingyiXingyi 562400China School of information and Electronics Beijing Institute of TechnologyBeijing 100081China

On-chip multidimensional multiplexing has shown considerable potential for enhancing transmission capacity and developing communication networks in integrated optical ***-ring resonators,which utilize the wavelength-dependent whispering gallery resonance mechanism and feature customizable cavity lengths,offer inherent advantages for accurate wavelength *** characteristics make them promising candidates for wavelength ***,a significant challenge arises from the mismatch in the effective refractive index between orthogonal linear polarizations,which introduces complexities to polarization channel multiplexing and impedes progress in on-chip multidimensional multiplexing that integrates both wavelength and polarization *** this work,we propose a double-layer adiabatic structureconnected micro-ring resonator(AMRR)with vertical refractive index asymmetry,demonstrating its utility in multidimensional(de)*** approach enables polarization division multiplexing(PDM)by facilitating polarization rotation between transverse electric and transverse magnetic polarizations through polarization ***(de)multiplexing of both wavelength and polarization channels is achieved by controlling the incident light direction and filtering the resonance wavelength within the micro-ring *** a proof of concept,we successfully transmitted 144 Gbit/s QPSK-OFDM signals and achieved bit error rates below the forward error correction threshold at-19 d Bm using the proposed multidimensional(de)multiplexer,which accommodates 3 wavelengths and 2 *** design,which leverages the AMRR for simultaneous(de)multiplexing of wavelength and polarization channels,not only overcomes the limitation of traditional micro-ring resonators in implementing PDM,but also reduces the footprint of the multidimensional(de)multiplexer to 27μm×219μm,an order of magnitude smaller compared to conventional designs.

关键词： micro-ring resonator multidimensional(de)multiplexer polarization rotation polarization hybridization

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Light control of droplets on photo-induced charged surfaces

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National Science Review 2023年第1期10卷 259-267页

作者： Fang Wang Meijin Liu Cong Liu Chao Huang Lidong Zhang Anyang Cui Zhigao Hu Xuemin Du Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences Department of Chemistry and Molecular Engineering East China Normal University Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Engineering Research Center of Nanophotonics and Advanced Instrument(Ministry of Education)Department of Physics School of Physics and Electronic Science East China Normal University

The manipulation of droplets plays a vital role in fundamental research and practical applications,from chemical reactions to *** an intriguing and active format,light control of droplets,typically induced by photochemistry,photomechanics,light-induced Marangoni effects or light-induced electric fields,enables remote and contactless control with remarkable spatial and temporal ***,current light control of droplets suffers from poor performance and limited *** we develop a new superamphiphobic material that integrates the dual merits of light and electric field by rationally preparing liquid metal particles/poly（vinylidene fluoride-trifluoroethylene） polymer composites with photo-induced charge generation capability in real time,enabling light control of droplets on the basis of photo-induced dielectrophoretic *** demonstrate that this photo-induced charged surface（PICS）imparts a new paradigm for controllable droplet motion,including high average velocity(～35.9 mm s-1),unlimited distance,multimode motions（***,backward and rotation） and single-to-multiple droplet manipulation,which are otherwise unachievable in conventional *** further extend light control of droplets to robotic and bio-applications,including transporting a solid cargo in a closed tube,crossing a tiny tunnel,avoiding obstacles,sensing the changing environment via naked-eye color shift,preparing hydrogel beads,transporting living cells and reliable *** PICS not only provides insight into the development of new smart interface materials and microfluidics,but also brings new possibilities for chemical and biomedical applications.

关键词： light control droplet manipulation smart surface liquid metal ferroelectric

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A four-dimensional model for the information storage/output of life

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Nano Research 2023年第2期16卷 2630-2634页

作者： Bo Song Lei Jiang Key Laboratory of Optical Technology and Instrument for Medicine Ministry of EducationShanghai Key Lab of Modern Optical SystemSchool of Optical-Electrical Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

A large amount of progress has achieved in neuroscience,however,there is still a lack of reasonable model for the storage/output(S/O)of life *** cyclical motion of cardio-and pulmonary-myocyte is a typical process of the life information S/O,while the opening and closing sites of Ca^(2+)ion channels during the motion can form a genetically programmed time-dependent three-dimensional(3D)*** phenomena indicate a strong correlation of the information S/O model of these myocytes with the time-sequence 3D ***,based on the time-dependent Ca^(2+)fluorescence imaging during the motion of cardio-and pulmonary-myocyte,here we suggest a four-dimensional(4D)code of information S/O model in cell and nervous *** from the fact of pulmonary myocyte motion able to be controlled by brain,it is deduced that the 4D code in brain has a role of controlling muscles through a pathway of the central nervous system,peripheral nervous system,neuromuscular junction,and muscle *** addition,we also suggested the 4D code of non-innate skill that can be programmed by the learning/training of a long time(~3 years),such as walking,writing,painting,sports,speech,singing,and ***,this 4D S/O model is reasonable for the ultralow energy consumption of life information transmission.

关键词： four-dimensional(4D)storage/output model life information cell nervous system

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