中国物理B ›› 2019, Vol. 28 ›› Issue (5): 54204-054204.doi: 10.1088/1674-1056/28/5/054204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Optically manipulated nanomechanics of semiconductor nanowires

Chenzhi Song(宋晨之), Shize Yang(杨是赜), Xiaomin Li(李晓敏), Xiao Li(李晓), Ji Feng(冯济), Anlian Pan(潘安练), Wenlong Wang(王文龙), Zhi Xu(许智), Xuedong Bai(白雪冬)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, China;
    3 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, and State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2019-02-17 修回日期:2019-03-09 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Zhi Xu, Xuedong Bai E-mail:xuzhi@iphy.ac.cn;xdbai@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21773303, 21872172, 51472267, and 51421002) and the Chinese Academy of Sciences (Grant Nos. ZDYZ2015-1, XDB30000000, and XDB07030100).

Optically manipulated nanomechanics of semiconductor nanowires

Chenzhi Song(宋晨之)1,5, Shize Yang(杨是赜)2, Xiaomin Li(李晓敏)1, Xiao Li(李晓)2, Ji Feng(冯济)2, Anlian Pan(潘安练)3, Wenlong Wang(王文龙)1,4, Zhi Xu(许智)1,4, Xuedong Bai(白雪冬)1,4,5   

  1. 1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, China;
    3 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, and State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2019-02-17 Revised:2019-03-09 Online:2019-05-05 Published:2019-05-05
  • Contact: Zhi Xu, Xuedong Bai E-mail:xuzhi@iphy.ac.cn;xdbai@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21773303, 21872172, 51472267, and 51421002) and the Chinese Academy of Sciences (Grant Nos. ZDYZ2015-1, XDB30000000, and XDB07030100).

摘要:

Opto-electromechanical coupling at the nanoscale is an important topic in new scientific studies and technical applications. In this work, the optically manipulated electromechanical behaviors of individual cadmium sulfide (CdS) nanowires are investigated by a customer-built optical holder inside transmission electron microscope, wherein in situ electromechanical resonance took place in conjunction with photo excitation. It is found that the natural resonance frequency of the nanowire under illumination becomes considerably lower than that under darkness. This redshift effect is closely related to the wavelength of the applied light and the diameter of the nanowires. Density functional theory (DFT) calculation shows that the photoexcitation leads to the softening of CdS nanowires and thus the redshift of natural frequency, which is in agreement with the experimental results.

关键词: opto-electromechanical coupling, nano-electromechanical systems (NEMS), in-situ transmission electron microscopy (TEM), semiconductor nanowires

Abstract:

Opto-electromechanical coupling at the nanoscale is an important topic in new scientific studies and technical applications. In this work, the optically manipulated electromechanical behaviors of individual cadmium sulfide (CdS) nanowires are investigated by a customer-built optical holder inside transmission electron microscope, wherein in situ electromechanical resonance took place in conjunction with photo excitation. It is found that the natural resonance frequency of the nanowire under illumination becomes considerably lower than that under darkness. This redshift effect is closely related to the wavelength of the applied light and the diameter of the nanowires. Density functional theory (DFT) calculation shows that the photoexcitation leads to the softening of CdS nanowires and thus the redshift of natural frequency, which is in agreement with the experimental results.

Key words: opto-electromechanical coupling, nano-electromechanical systems (NEMS), in-situ transmission electron microscopy (TEM), semiconductor nanowires

中图分类号:  (Mechanical effects of light on material media, microstructures and particles)

  • 42.50.Wk
85.85.+j (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices) 68.37.Lp (Transmission electron microscopy (TEM)) 78.67.Uh (Nanowires)