Anisotropic terahertz optostriction in group-IV monochalcogenide compounds
Anisotropic terahertz optostriction in group-IV monochalcogenide compounds
复制标题
IV族单硫属化合物中的各向异性太赫兹光致伸缩
DOI:
10.1103/physrevb.105.195406
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发表时间:
2022-04
影响因子:
3.7
通讯作者:
Zhou Jian
中科院分区:
文献类型:
--
作者:
Liu Kun;Zhou Jian
Terahertz (THz) technology is a cutting-edge scheme with various promising applications, such as next generation telecommunication, non-destructive evaluation, security check, and in-depth characterization, owing to their sensitivity to material geometric change and good transparency. Even though tremendous progresses have been made during the past decade, exploration the mechanisms of THz-matter interaction microscopically is still in its infancy. In this work, we use thermodynamic theory to show how THz illumination deforms materials and use group-IV monochalcogenide compounds to illustrate it. According to our first-principles density functional theory calculations, THz light with intermediate intensity (~109 W/cm2) could yield elastic deformations on the order of ~0.1%, depending on laser polarization direction. Large anisotropic opto-mechanical responses are also revealed. Finally, we show that such strain can be detected via measuring the layer-resolved shift current under a probe light irradiation.
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