利用宽带时域布里渊散射测定 GaS 中的面外纵向声速

Out-of-Plane Longitudinal Sound Speed Determination in GaS by Broadband Time-Domain Brillouin Scattering.

作者信息

Al-Basheer Watheq, Viernes Christian, Zheng Ruofei, Netzke Sam, Pichugin Kostyantyn, Sciaini German

机构信息

Department of Physics, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

Interdisciplinary Research Center of Membranes and Water Security, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

出版信息

ACS Omega. 2024 Nov 21;9(48):47475-47479. doi: 10.1021/acsomega.4c05738. eCollection 2024 Dec 3.

DOI:10.1021/acsomega.4c05738

PMID:39651107

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11618444/

Abstract

Two-dimensional semiconducting gallium sulfide (GaS) has garnered notable interest for its distinct structural and optical properties, which position it as a promising candidate material for various applications ranging from photodetection and photovoltaics to nonlinear frequency conversion. In this work, we determined the out-of-plane longitudinal sound velocity, , via impulsive time-domain femtosecond broadband Brillouin scattering measurements performed on a single flake-like GaS crystal. We obtained a value (3140 ± 20) m/s, which yields an out-of-plane compressive elastic constant, = (38.1 ± 0.5) GPa.

摘要

二维半导体硫化镓（GaS）因其独特的结构和光学性质而备受关注，这使其成为从光电探测、光伏到非线性频率转换等各种应用中有前景的候选材料。在这项工作中，我们通过对单个片状GaS晶体进行脉冲时域飞秒宽带布里渊散射测量，确定了面外纵向声速。我们得到的值为（3140±20）m/s，由此得出面外压缩弹性常数 =（38.1±0.5）GPa。