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Strong-field photoelectron holography in the subcycle limit

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Light(Science & Applications) 2024年第6期13卷 1032-1040页

作者： Tsendsuren Khurelbaatar Jaewuk Heo ShaoGang Yu XuanYang Lai XiaoJun Liu Dong Eon Kim Center for Attosecond Science and Technology Department of PhysicsPohang University of Science and TechnologyPohangGyeongbuk37673Korea max Planck POSTECH/KOREA Research Initiative PohangGyeongbuk37673Korea 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 Sciences430071WuhanChina wuhan Institute of Quantum Technology 430206WuhanChina

Strong-field photoelectron holography is promising for the study of electron dynamics and structure in atoms and molecules,with superior spatiotemporal resolution compared to conventional electron and X-ray ***,the application of strong-field photoelectron holography has been hindered by inter-cycle interference from multicycle ***,we address this challenge by employing a near-single-cycle field to suppress the inter-cycle *** observed and separated two distinct holographic patterns for the first *** measurements allow us not only to identify the Gouy phase effect on electron wavepackets and holographic patterns but also to correctly extract the internuclear separation of the target molecule from the holographic *** work leads to a leap jump from theory to application in the field of strong-field photoelectron holography-based ultrafast imaging of molecular structures.

关键词： photoelectron holographic cycle

Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-10 experiment

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Science China(Physics,mechanics & Astronomy) 2024年第10期67卷 83-91页

作者： Zhenhua Zhang Litao Yang Qian Yue Kejun Kang Yuanjing Li Haipeng An Greeshma C. Jianping Chang Yunhua Chen Jianping Cheng wenhan Dai Zhi Deng Changhao Fang Xinping Geng Hui Gong Qiuju Guo Tao Guo Xuyuan Guo Li He Shengming He Jinwei Hu Hanxiong Huang Tuchen Huang Lin Jiang S.Karmakar Haubin Li Hanyu Li Jianmin Li Jin Li Qianyun Li Renmingjie Li Xueqian Li Yulan Li Yifan Liang Bin Liao FongKay Lin ShinTed Lin Jiaxuan Liu Shukui Liu Yandong Liu Yu Liu Yuanyuan Liu Hao ma Yucai mao Qiyuan Nie Jinhua Ning Hui Pan Ningchun Qi Jie Ren Xichao Ruan monoj Kumar Singh Tianxi Sun Changjian Tang Yang Tian Guangfu wang Junzheng wang Li wang Qing wang Yufeng wang Yunxiang wang Henry Tsz-King wong Shiyong wu Yucheng wu Haoyang Xing Rui Xu Yin Xu Tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng Yue ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong Zhao Kangkang Zhao minggang Zhao Jifang Zhou Zuying Zhou Jingjun Zhu CDEX Collaboration Key laboratory of Particle and Radiation imaging(ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Institute of Physics Academia SinicaTaipei 11529China NUCTECH Company Beijing 100084China YaLong River Hydropower Development Company Chengdu 610051China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China College of Physics Sichuan UniversityChengdu 610065China School of Physics Peking UniversityBeijing 100871China Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China Sino-French Institute of Nuclear and Technology Sun Yet-sen UniversityZhuhai 519082China School of Physics Nankai UniversityTianjin 300071China Department of Physics Banaras Hindu UniversityVaranasi 221005India Department of Physics Beijing Normal UniversityBeijing 100875China 不详

Dark matter(Dm)is a major constituent of the ***,no definite evidence of Dm particles(denoted as“χ”)has been found in Dm direct detection(DD)experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes(PBHs).we search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1×10^(15)to 7×10^(16)g under the current limits of PBH abundance *** 205.4 kg·day data obtained from the CDEX-10 experiment conducted in the China Jinping Underground laboratory,we exclude theχ-electron(χ-e)elastic-scattering cross sectionσ_(χe)~5×10^(-29)cm^(2)forχwith a mass■keV from our *** the higher radiation background but lower energy threshold(160 eV),CDEX-10 fills a part of the gap in the previous ***(m_(χ),σ_(χe))can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large mPBHs.

关键词： CDEX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

Generating a nanoscale blade-like optical field in a coupled nanofiber pair

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Photonics Research 2024年第1期12卷 154-162页

作者： YUXIN YANG JIAXIN GAO HAO wU ZHANKE ZHOU LIU YANG XIN GUO PAN wANG LImIN TONG Interdisciplinary Center for Quantum Information New Cornerstone Science LaboratoryState Key Laboratory of Extreme Photonics and InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Jiaxing Key laboratory of Photonic Sensing&Intelligent imaging Intelligent Optics&Photonics Research CenterJiaxing Research Institute Zhejiang UniversityJiaxing 314000China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

An optical field with sub-nm confinement is essential for exploring atomic-or molecular-level light-matter *** such fields demonstrated so far have typically point-like cross-sections,an optical field having a higher-dimensional cross-section may offer higher flexibility and/or efficiency in ***,we propose generating a nanoscale blade-like optical field in a coupled nanofiber pair(CNP)with a 1-nm-width central *** on a strong mode coupling-enabled slit waveguide mode,a sub-nm-thickness blade-like optical field can be generated with a cross-section down to~0.28 nm×38 nm at 1550 nm wavelength(i.e.,a thickness of~λ_(0)∕5000)and a peak-to-background intensity ratio(PBR)higher than 20 d *** slit waveguide mode of the CNP can be launched from one of the two nanofibers that are connected to a standard optical fiber via an adiabatical fiber taper,in which a fundamental waveguide mode of the fiber can be converted into a high-purity slit mode with high efficiency(>98%)within a CNP length of less than 10μm at 1550 nm *** wavelengthdependent behaviors and group velocity dispersion in mode converting processes are also investigated,showing that such a CNP-based design is also suitable for broadband and ultrafast pulsed *** results may open up new opportunities for studying light-matter interaction down to the sub-nm scale,as well as for exploring ultra-high-resolution optical technology ranging from super-resolution nanoscopy to chemical bond manipulation.

关键词： fiber waveguide optical

含水冷冻电子显微术与生物大分子三维重构——疱疹病毒壳粒三维结构测定

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电子显微学报 1996年第2期15卷 291-300页

作者：周正洪 w.m.keck计算生物学中心

用含水冷冻电子显微术进行生物大分子三维重构是近年来迅速发展的一门新兴学科。本文从理论和实验双方面对之作了阐述。首先对含水生物样品低剂量成像下弱相位近似假设及其对数据处理的影响进行了说明。病毒颗粒具有二十面体对称性,因... 详细信息

用含水冷冻电子显微术进行生物大分子三维重构是近年来迅速发展的一门新兴学科。本文从理论和实验双方面对之作了阐述。首先对含水生物样品低剂量成像下弱相位近似假设及其对数据处理的影响进行了说明。病毒颗粒具有二十面体对称性,因此病毒壳粒的空间取向可通过它们电镜像中的等价线来确定,这样使数据处理计算量减少,也减小了需要用于三维重构的颗粒像数目。用400千伏、束斑扫描的疤疹病毒含水冷冻照片作为例子,对样品制备及低剂量成像作了概括。二十面体病毒重构包括以下几大运算步骤:照片鉴定和欠焦量测定,颗粒取向和中心确定、三维重构和精修、以及三维图像显示和最后结合已知的生化知识对结构进行解释。病毒结构测定的长远目标是原子水平的结构,场发射电子枪电镜在生物大分子成像中的应用将使实现这一目标成为可能。

关键词：含水冷冻电子显微术三维重构生物大分子病毒

众脑之力:通过开放神经影像数据和大规模协作催化神经精神疾病的创新发现

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Science Bulletin 2024年第10期69卷 1536-1555页

作者：鲁彬陈骁 Francisco Xavier Castellanos Paul m.Thompson 左西年臧玉峰严超赣 CAS Key laboratory of Behavioral Science Institute of PsychologyBeijing 100101China Department of Psychology University of Chinese Academy of SciencesBeijing 100101China Department of Child and Adolescent Psychiatry NYU Grossman School of MedicineNew York 10016USA d Nathan Kline Institute for Psychiatric Research Orangeburg 10962USA imaging Genetics Center Mark&Mary Stevens Institute for Neuroimaging&InformaticsKeck School of MedicineUniversity of Southern CaliforniaLos Angeles 90033USA Developmental Population Neuroscience Research Center IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijing 100875China National Basic Science Data Center Beijing 100190China Centre for Cognition and Brain Disorders The Affiliated Hospital of Hangzhou Normal UniversityHangzhou 310004China Institute of Psychological Science Hangzhou Normal UniversityHangzhou 310030China Zhejiang Key laboratory for Research in Assessment of Cognitive Impairment Hangzhou 311121China International Big-Data Center for Depression Research Institute of PsychologyChinese Academy of SciencesBeijing 100101China magnetic Resonance imaging Research Center Institute of PsychologyChinese Academy of SciencesBeijing 100101China

Recent advances in open neuroimaging data are enhancing our comprehension of neuropsychiatric *** pooling images from various cohorts,statistical power has increased,enabling the detection of subtle abnormalities and robust associations,and fostering new research *** collaborations in imaging have furthered our knowledge of the neurobiological foundations of brain disorders and aided in imaging-based prediction for more targeted ***-scale magnetic resonance imaging initiatives are driving innovation in analytics and supporting generalizable psychiatric *** also emphasize the significant role of big data in understanding neural mechanisms and in the early identification and precise treatment of neuropsychiatric ***,challenges such as data harmonization across different sites,privacy protection,and effective data sharing must be *** proper governance and open science practices,we conclude with a projection of how large-scale imaging resources and collaborations could revolutionize diagnosis,treatment selection,and outcome prediction,contributing to optimal brain health.

关键词： magnetic resonance imaging Neuropsychiatric disorders Big data Open science Artificial intelligence

Renormalization Group on the Aperiodic Hamiltonian

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Chinese Physics Letters 1992年第11期9卷 623-625页

作者： YAN Xiaohong YOU Jianqiang YAN Jiaren ZHONG Jianxin laboratory of atomic imaging of Solids Institute of Metal ResearchAcademia SinicaShenyang 110015 laboratory of modern Physics Institute of Science and TechnologyXiangtan UniversityXiangtan 411105

we present the renormalization group of the generalized Fibonacci lattices associated with the aperiodic sequences as constructed by the inflation rule:{A,B}→{A^(n)B^(m),A},in which m and n are positive *** derived renormalization group consists of 2n(n+m-1)+1 basic renormalization-group *** suitable combinations of these basic transformations,the local electronic properties of the generalized Fibonacci lattices can be exactly obtained.

关键词： periodic Hamiltonian Fibonacci

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双壁碳纳米管的电子显微学研究

电子显微学报 2007年第4期26卷 327-334页

作者：张婧娉 HAKAN Deniz 秦禄昌刘庆丰任文才成会明中国科学院金属研究所沈阳材料科学国家(联合)实验室 w.m.keck laboratory for atomic imaging and manipulation University of North Carolina at Chapel HillChapel HillNC 27599-3255USA

本文分析研究了甲酸镍二水合物作为催化剂前驱体,多壁管为原料,采用氢电弧放电法制得的双壁碳纳米管样品中不同管壁数目碳纳米管的分布及双壁碳管直径分布,发现样品中单壁和双壁碳管占主要地位,双壁管的内径主要分布在1.67 nm^3.67 nm之... 详细信息

本文分析研究了甲酸镍二水合物作为催化剂前驱体,多壁管为原料,采用氢电弧放电法制得的双壁碳纳米管样品中不同管壁数目碳纳米管的分布及双壁碳管直径分布,发现样品中单壁和双壁碳管占主要地位,双壁管的内径主要分布在1.67 nm^3.67 nm之间,外径主要分布在2.33 nm^4.33 nm之间。此外,精确测定了三个双壁碳纳米管的螺旋指数,分别为[(28,3)(29,17)],[(19,8)(29,6)]及[(23,15)(28,22)],其电学性能分别为[半导体性,金属性],[半导体性,半导体性]及[半导体性,金属性]。同时,观察了在不同条件下的电子辐照效应。结果表明,经辐照碳管的最内层管壁先发生断裂,其形变速度逐渐变慢,单根碳管易依附于大块物质。在相同的辐照条件下,管壁数目越多碳管越稳定。当管壁数目相同时,直径小的管比直径大的管稳定。高加速电压能够加速碳管的变形。

关键词：碳纳米管透射电子显微术电子衍射电子辐照螺旋度

THE STRUCTURE CHANGE OF γ-TiAl IRRADIATED BY 50keV XENON IONS AT ROOm TEmPERATURE

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Acta metallurgica Sinica(English Letters) 2001年第4期14卷 263-266页

作者： X.m. meng, L.L. He and D.X. Li laboratory of atomic imaging of Solid, Institute of metal Research, The Chinese Academy of Sciences, Shenyang 110016, China laboratory of atomic imaging of Solid Institute of Metal ResearchThe Chinese Academy of SciencesShenyang 110016China

The structure change of γ-TiAl intermetallic alloy irradiated by 50keV xenon ions with a dose of 7.6× 10~18 ions/m^2 was studied in a high voltage transmission electron micr... 详细信息

The structure change of γ-TiAl intermetallic alloy irradiated by 50keV xenon ions with a dose of 7.6× 10~18 ions/m^2 was studied in a high voltage transmission electron microscope at room temperature. Some precipitates appeared in the γ-TiAl grains, which have a hexagonal structure with a=0.P283nm and c=0.462nm, and seems to be the disordered Al_2 Ti_3 phase. The orientation relationship between the precipitates and matrix is (0001)p//(11■)_γ-TiAl and [2■■0]_p//[011]γ-TiAl.

关键词： γ-TiAl alloy zenon ions irradiation precipitate

Limits on light wImPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground laboratory

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Chinese Physics C 2018年第2期42卷 12-21页

作者：杨丽桃李浩斌岳骞康克军程建平李元景王子敬 m.Agartioglu 安海鹏常建平陈景瀚陈云华邓智杜强宫辉何力胡津纬胡庆东黄瀚雄贾历平江灏李红李荐民李金李霞李学潜李玉兰林枫凯林兴德刘书魁刘仲智马豪马菁露潘辉任杰阮锡超 B.Sevda Vivek Sharma 申满斌 Lakhwinder Singh manoj Kumar Singh 唐昌建唐维优田阳王继敏王力王青王轶吴世勇吴玉成幸浩洋徐音薛涛杨松伟易难喻纯旭于海军岳剑峰曾雄辉曾鸣曾志张云华赵明刚赵伟周济芳周祖英朱敬军朱忠华 Key laboratory of Particle and Radiation imaging (ministry of Education) and Department of Engineering Physics Tsinghua University Department of Physics Tsinghua University Institute of Physics Academia Sinica Key laboratory of Particle and Radiation imaging vand Department of Engineering Physics Tsinghua University NUCTECH Company YaLong River Hydropower Development Company College of Physical Science and Technology Sichuan University Department of Nuclear Physics China Institute of Atomic Energy School of Physics Nankai University Department of Physics Banaras Hindu University Key laboratory of Particle and Radiation imaging and Department of Engineering Physics Tsinghua University

we report results of a search for light weakly interacting massive particle（wImP） dark matter from the CDEX-1 experiment at the China Jinping Underground laboratory（CJPL）. Constraints on wImP-nucleon spin-independent（SI） and spin-dependent（SD） couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light wImPs to 2 GeV and improve over our earlier bounds at wImP mass less than 6 GeV.

关键词： dark matter wImPs CDEX pPCGe