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Attosecond spectroscopy for filming the ultrafast movies of atoms,molecules and solids

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Chinese Physics B 2022年第12期31卷 191-211页

作者： Lixin He Xiaosong Zhu Wei Cao pengfei lan Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and TechnologyWuhan 430074China Optical Valley Laboratory Hubei 430074China

Three decades ago,a highly nonlinear nonpertubative phenomenon,now well-known as the high harmonic generation(HHG),was discovered when intense laser irradiates gaseous *** the HHG produces broadband coherent radiation,it becomes the most promising source to obtain attosecond *** door to the attosecond science was opened ever *** this review,we will revisit the incredible adventure to the ***,the progress of attosecond pulse generation is ***,we introduce the efforts on imaging the structures or filming the ultrafast dynamics of nuclei and electrons with unprecedented attosecond temporal and Angstrom spatial resolutions,utilizing the obtained attosecond pulses as well as the high harmonic spectrum itself.

关键词： strong-field physics attosecond science high harmonic generation ultrafast spectroscopy

Full experimental determination of tunneling time with attosecond-scale streaking method

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Light(Science & Applications) 2022年第8期11卷 1903-1908页

作者： Miao Yu Kun Liu Min Li Jiaqing Yan Chuanpeng Cao Jia Tan Jintai Liang Keyu Guo Wei Cao pengfei lan Qingbin Zhang Yueming Zhou Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology430074WuhanChina Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and Technology215009SuzhouChina Optics Valley Laboratory 430074HubeiChina

Tunneling is one of the most fundamental and ubiquitous processes in the quantum *** question of how long a particle takes to tunnel through a potential barrier has sparked a long-standing debate since the early days of quantum ***,we propose and demonstrate a novel scheme to accurately determine the tunneling time of an *** this scheme,a weak laser field is used to streak the tunneling current produced by a strong elliptically polarized laser field in an attoclock configuration,allowing us to retrieve the tunneling ionization time relative to the field maximum with a precision of a few *** overcomes the difficulties in previous attoclock measurements wherein the Coulomb effect on the photoelectron momentum distribution has to be removed with theoretical models and it requires accurate information of the driving laser *** demonstrate that the tunneling time of an electron from an atom is close to zero within our experimental *** study represents a straightforward approach toward attosecond time-resolved imaging of electron motion in atoms and molecules.

关键词： tunneling quantum scheme

Background-free detection of molecular chirality using a single-color beam [Invited]

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Chinese Optics Letters 2022年第10期20卷 14-19页

作者： Yuhang Chen Xiaosong Zhu pengfei lan Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China

We propose and numerically demonstrate a simple and background-free all-optical chiral spectroscopy technique for gas *** approach is based on high harmonic generation driven by a new type of laser beam that is produced by one linearly polarized single-color beam passing through a lens and a *** is shown that chiral and achiral signals are completely separated in frequency,indicating strong background-free and highly sensitive chirality *** believe this all-optical method can open new opportunities for ultrafast detection for chiral dynamics in the femtoseond to attosecond time scale.

关键词： high harmonic generation strong-field chiral spectroscopy selection rule

Attosecond probing and control of charge migration in carbon-chain molecule

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Advanced Photonics 2023年第5期5卷 33-40页

作者： Lixin He Yanqing He Siqi Sun Esteban Goetz Anh-Thu Le Xiaosong Zhu pengfei lan Peixiang Lu Chii-Dong Lin Huazhong University of Science and Technology Wuhan National Laboratory for Optoelectronics and School of PhysicsWuhanChina University of Connecticut Department of PhysicsStorrsConnecticutUnited States Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern RecognitionWuhanChina Kansas State University Department of PhysicsManhattanKansasUnited States

In quantum mechanics,when an electron is quickly ripped off from a molecule,a superposition of new eigenstates of the cation creates an electron wave packet that governs the charge flow inside,which has been called charge migration(CM).Experimentally,extracting such dynamics at its natural(attosecond)timescale is quite *** report the first such experiment in a linear carbon-chain molecule,butadiyne(C_(4)H_(2)),via high-harmonic spectroscopy(HHS).By employing advanced theoretical and computational tools,we showed that the wave packet and the CM of a single molecule are reconstructed from the harmonic spectra for each fixed-in-space angle of the *** this onedimensional molecule,we calculate the center of charge (t) to obtain v_(cm),to quantify the migration speed and how it depends on the orientation *** findings also uncover how the electron dynamics at the first few tens to hundreds of attoseconds depends on molecular *** method can be extended to other molecules where the HHS technique can be employed.

关键词： attosecond charge migration high-harmonic spectroscopy single-molecule harmonic dipole machine learning

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阿秒激光脉冲的产生与操控

科学通报 2021年第8期66卷 847-855页

作者：兰鹏飞陆培祥华中科技大学物理学院武汉光电国家研究中心武汉430074

随着激光技术的发展,激光的脉宽不断减小.21世纪初,研究者首次突破飞秒的界限,在实验室产生了孤立的阿秒脉冲,由此打开了阿秒科学的大门.目前最短的激光脉宽达到了43 as,这为超快光学测量带来了前所未有的时间分辨率,阿秒科学也成为近2... 详细信息

随着激光技术的发展,激光的脉宽不断减小.21世纪初,研究者首次突破飞秒的界限,在实验室产生了孤立的阿秒脉冲,由此打开了阿秒科学的大门.目前最短的激光脉宽达到了43 as,这为超快光学测量带来了前所未有的时间分辨率,阿秒科学也成为近20年来超快光学领域最重要的成就之一.虽然少周期驱动光、偏振选通、双色光等多种方案已经被用于调控阿秒脉冲的产生,许多调控阿秒光源椭偏率的方法也得到了证实,但如何提升阿秒脉冲的能量及产生圆偏振阿秒脉冲仍然是当前研究的热点.

关键词：阿秒脉冲高次谐波偏振控制少周期激光脉冲

Multiple Tin Compounds Modified Carbon Fibers to Construct Heterogeneous Interfaces for Corrosion Prevention and Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第1期17卷 507-527页

作者： Zhiqiang Guo Di lan Zirui Jia Zhenguo Gao Xuetao Shi Mukun He Hua Guo Guanglei Wu pengfei Yin College of Science Sichuan Agricultural UniversityYa’an 625014People’s Republic of China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002People’s Republic of China Institute of Materials for Energy and Environment State Key Laboratory of Bio‑Fibers and Eco‑TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China

Currently,the demand for electromagnetic wave(EMW)absorbing materials with specific functions and capable of withstanding harsh environments is becoming increasingly ***-component interface engineering is considered an effective means to achieve high-efficiency EMW ***,interface modulation engineering has not been fully discussed and has great potential in the field of EMW *** this study,multi-component tin compound fiber composites based on carbon fiber(CF)substrate were prepared by electrospinning,hydrothermal synthesis,and high-temperature thermal *** utilizing the different properties of different substances,rich heterogeneous interfaces are *** effectively promotes charge transfer and enhances interfacial polarization and conduction *** prepared SnS/SnS_(2)/SnO_(2)/CF composites with abundant heterogeneous interfaces have and exhibit excellent EMW absorption properties at a loading of 50 wt%in epoxy *** minimum reflection loss(RL)is−46.74 dB and the maximum effective absorption bandwidth is 5.28 ***,SnS/SnS_(2)/SnO_(2)/CF epoxy composite coatings exhibited long-term corrosion resistance on Q235 steel ***,this study provides an effective strategy for the design of high-efficiency EMW absorbing materials in complex and harsh environments.

关键词： Electrostatic spinning Component regulation Heterogeneous interfaces Electromagnetic wave absorption Corrosion protection

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高平均功率高次谐波光源的研究进展(特邀)

光子学报 2024年第6期53卷 13-25页

作者：孟黎辉兰鹏飞陆培祥华中科技大学武汉光电国家研究中心物理学院武汉430074

阿秒激光脉冲(10-18 s)具有超高的时间分辨率,可以用于实现原子分子内的电子动力学的探测,这使阿秒科学成为超快光学领域里最受关注的研究前沿。传统的钛宝石飞秒激光驱动的高次谐波阿秒脉冲平均功率较低。最近,高平均功率的掺镱激光发... 详细信息

阿秒激光脉冲(10-18 s)具有超高的时间分辨率,可以用于实现原子分子内的电子动力学的探测,这使阿秒科学成为超快光学领域里最受关注的研究前沿。传统的钛宝石飞秒激光驱动的高次谐波阿秒脉冲平均功率较低。最近,高平均功率的掺镱激光发展迅速,为产生高功率高次谐波阿秒脉冲提供了良好的驱动源。本文回顾了近二十年高重频的高次谐波光源的平均功率和最高光子能量逐步提高的研究进展,并介绍了高重频高次谐波阿秒脉冲在泵浦探测实验和相干成像等方面的应用和前景。

关键词：高次谐波阿秒脉冲高平均功率极紫外掺镱激光器

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华安县“五馆一中心”复杂结构设计

建筑结构 2021年第1期51卷 13-18页

作者：陈跃辉蓝鹏飞厦门合立道工程设计集团股份有限公司厦门361006

华安县"五馆一中心"由东、西两个单体组成,各馆之间通过2层连廊和平台连接,各馆设1层地下室。项目场地南北高差9m,北侧室外地面在建筑地上2层楼面附近,南侧室外地面在地下室底板面。本工程结构设计存在建筑高度的判定、嵌固端的选择、... 详细信息

华安县"五馆一中心"由东、西两个单体组成,各馆之间通过2层连廊和平台连接,各馆设1层地下室。项目场地南北高差9m,北侧室外地面在建筑地上2层楼面附近,南侧室外地面在地下室底板面。本工程结构设计存在建筑高度的判定、嵌固端的选择、结构设缝、南北侧土推力不平衡等问题;由于文体建筑的功能需要,主体结构存在平面不规则、竖向不规则、斜柱、穿层柱等多个不规则项。从结构体系和概念的角度,界定了建筑高度和嵌固端,进行了计算模型的简化,对关键构件进行性能化设计,对关键节点进行有限元分析,确保结构安全可靠。研究结果可为坡地建筑的超限结构设计提供参考。

关键词：文体建筑坡地建筑复杂结构超限结构结构设计

家族董事席位超额控制与企业投资偏好——来自创始人控制家族企业的经验证据

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证券市场导报 2023年第9期 33-42页

作者：王秀钢兰鹏飞苏春华西证券股份有限公司研究所北京100032 重庆理工大学会计学院重庆400054

本文以2008―2021年我国A股上市公司中创始人控制的家族企业为研究对象,考察了家族董事席位超额控制对企业投资偏好的影响。研究发现,家族董事席位超额控制行为及程度与企业长期投资强度正相关、与企业短期投资强度负相关。进一步研究发... 详细信息

本文以2008―2021年我国A股上市公司中创始人控制的家族企业为研究对象,考察了家族董事席位超额控制对企业投资偏好的影响。研究发现,家族董事席位超额控制行为及程度与企业长期投资强度正相关、与企业短期投资强度负相关。进一步研究发现,当地区市场化进程较快、家族企业处于成长期或成熟期、经济政策不确定性较低时,家族董事席位超额控制对企业投资偏好才具有上述影响。经济后果分析表明,家族董事席位超额控制有助于提升长期投资强度及降低短期投资强度,进而改善企业绩效水平。本文不仅丰富了家族董事席位超额控制的相关研究,也对创始人控制家族企业的投资偏好给出了更多的解释。

关键词：创始人控制家族企业家族董事席位超额控制投资偏好

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