中国物理B ›› 2025, Vol. 34 ›› Issue (9): 98701-098701.doi: 10.1088/1674-1056/ade250

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Optically-excited acoustic waves in Si nanowires probed by time-resolved HOLZ lines

He Wang(王贺)1, Shuaishuai Sun(孙帅帅)2, Yizhe Wang(王怡哲)1, Qianming An(安乾明)1, Xianhui Ye(叶显珲)1, Jun Li(李俊)2, Huanfang Tian(田焕芳)2, Huaixin Yang(杨槐馨)2, Jianqi Li(李建奇)2,†, and Zian Li(李子安)1,‡   

  1. 1 School of Physical Science and Technology, Guangxi University, Nanning 530004, China;
    2 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2025-05-10 修回日期:2025-06-06 接受日期:2025-06-09 出版日期:2025-08-21 发布日期:2025-09-15
  • 通讯作者: Tiejun Zhou, Zian Li E-mail:LJQ@iphy.ac.cn;zianli@gxu.edu.cn
  • 基金资助:
    This project is supported by the Guangxi Natural Science Foundation (Grant No. 2024GXNSFDA010014), the National Natural Science Foundation of China (Grant Nos. 12364018 and U22A6005), the Guangxi Science and Technology Major Program (Grant No. AA23073019), and the Innovation Project of Guangxi Graduate Education (Grant Nos. YCBZ2022049 and YCBZ2023015).

Optically-excited acoustic waves in Si nanowires probed by time-resolved HOLZ lines

He Wang(王贺)1, Shuaishuai Sun(孙帅帅)2, Yizhe Wang(王怡哲)1, Qianming An(安乾明)1, Xianhui Ye(叶显珲)1, Jun Li(李俊)2, Huanfang Tian(田焕芳)2, Huaixin Yang(杨槐馨)2, Jianqi Li(李建奇)2,†, and Zian Li(李子安)1,‡   

  1. 1 School of Physical Science and Technology, Guangxi University, Nanning 530004, China;
    2 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2025-05-10 Revised:2025-06-06 Accepted:2025-06-09 Online:2025-08-21 Published:2025-09-15
  • Contact: Tiejun Zhou, Zian Li E-mail:LJQ@iphy.ac.cn;zianli@gxu.edu.cn
  • Supported by:
    This project is supported by the Guangxi Natural Science Foundation (Grant No. 2024GXNSFDA010014), the National Natural Science Foundation of China (Grant Nos. 12364018 and U22A6005), the Guangxi Science and Technology Major Program (Grant No. AA23073019), and the Innovation Project of Guangxi Graduate Education (Grant Nos. YCBZ2022049 and YCBZ2023015).

摘要: Exploring advanced techniques capable of probing nanometric acoustic waves in nanostructures is critically important for the development of miniaturized acoustic devices. In this study, we probe the optically-excited acoustic waves in a single silicon nanowire (NW) using the time-resolved (tr-) high-order Laue-zone (HOLZ) lines under convergent-beam electron diffraction (CBED) conditions in an ultrafast transmission electron microscope (UTEM). We devise an experimental scheme to obtain tr-HOLZ lines under off-zone-axis CBED conditions. We also propose a geometric description of HOLZ line formation and use this alternative description to quantitatively evaluate the dynamics of optically-excited silicon NW. Using part of the deformation gradient tensor, our simulations of the dynamics of Si NW reproduce the experimental results. We further discuss the feasibility of a full retrieval of the deformation gradient tensor by using a set of HOLZ lines from three zone axes. Our findings illustrate a strategy for the quantitative access to dynamical acoustic waves optically excited in micro- and nano-structures using UTEM.

关键词: ultrafast transmission electron microscope, high-order Laue-zone lines, pulsed laser excitation, acoustic waves

Abstract: Exploring advanced techniques capable of probing nanometric acoustic waves in nanostructures is critically important for the development of miniaturized acoustic devices. In this study, we probe the optically-excited acoustic waves in a single silicon nanowire (NW) using the time-resolved (tr-) high-order Laue-zone (HOLZ) lines under convergent-beam electron diffraction (CBED) conditions in an ultrafast transmission electron microscope (UTEM). We devise an experimental scheme to obtain tr-HOLZ lines under off-zone-axis CBED conditions. We also propose a geometric description of HOLZ line formation and use this alternative description to quantitatively evaluate the dynamics of optically-excited silicon NW. Using part of the deformation gradient tensor, our simulations of the dynamics of Si NW reproduce the experimental results. We further discuss the feasibility of a full retrieval of the deformation gradient tensor by using a set of HOLZ lines from three zone axes. Our findings illustrate a strategy for the quantitative access to dynamical acoustic waves optically excited in micro- and nano-structures using UTEM.

Key words: ultrafast transmission electron microscope, high-order Laue-zone lines, pulsed laser excitation, acoustic waves

中图分类号:  (Electron microscopy)

  • 87.64.Ee
61.05.jm (Convergent-beam electron diffraction, selected-area electron diffraction, nanodiffraction)