Anisotropic optical and electric properties of β-gallium oxide  

作　　者：Yonghui Zhang Fei Xing 

机构地区：[1]School of Physics and Optoelectronic Engineering,Shandong University of Technology,Zibo 255000,China

出　　处：《Journal of Semiconductors》2023年第7期8-22,共15页半导体学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61505109);Youth Innovative Talents Attracting and Cultivating Plan of Colleges and Universities in Shandong Province(No.21);Youth Innovation Team of colleges and universities in Shandong Province(Grant No.2022KJ223);Shandong Provincial Natural Science Foundation(Grant No.ZR2021QF020).

摘　　要：The anisotropic properties and applications ofβ-gallium oxide(β-Ga_(2)O_(3))are comprehensively reviewed.All the anisotropic properties are essentially resulted from the anisotropic crystal structure.The process flow of how to exfoliate nanoflakes from bulk material is introduced.Anisotropic optical properties,including optical bandgap,Raman and photolumines-cence characters are comprehensively reviewed.Three measurement configurations of angle-resolved polarized Raman spec-tra(ARPRS)are reviewed,with Raman intensity formulas calculated with Raman tensor elements.The method to obtain the Raman tensor elements of phonon modes through experimental fitting is also introduced.In addition,the anisotropy in elec-tron mobility and affinity are discussed.The applications,especially polarization photodetectors,based onβ-Ga_(2)O_(3)were summa-rized comprehensively.Three kinds of polarization detection mechanisms based on material dichroism,1D morphology and metal-grids are discussed in-depth.This review paper provides a framework for anisotropic optical and electric properties ofβ-Ga_(2)O_(3),as well as the applications based on these characters,and is expected to lead to a wider discussion on this topic.

关 键 词：gallium oxide ANISOTROPIC DICHROISM POLARIZATION MONOCLINIC 

分 类 号：TN36[电子电信—物理电子学] TQ133.51[化学工程—无机化工]