Optically manipulated nanomechanics of semiconductor nanowires

doi:10.1088/1674-1056/28/5/054204

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.

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

Received: 17 February 2019
Revised: 09 March 2019
Accepted manuscript online:

PACS:	42.50.Wk	(Mechanical effects of light on material media, microstructures and particles)
	85.85.+j	(Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)
	68.37.Lp	(Transmission electron microscopy (TEM))
	78.67.Uh	(Nanowires)

Fund:

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).

Corresponding Authors: Zhi Xu, Xuedong Bai
E-mail: xuzhi@iphy.ac.cn;xdbai@iphy.ac.cn

Cite this article:

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) Optically manipulated nanomechanics of semiconductor nanowires 2019 Chin. Phys. B 28 054204

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