TO1 soft mode in Fe doped β-Ga2O3 studied by terahertz time-domain spectroscopy

被引：1
作者：
Jiang, Hao [1 ]
Wang, Ke [1 ]
Gong, Chen [2 ]
Murakami, Hironaru [1 ]
Tonouchi, Masayoshi [1 ]
机构：
[1] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
[2] Capital Normal Univ, Dept Phys, Beijing Key Lab Terahertz Spect & Imaging, MOE Key Lab Terahertz Optoelect, Beijing 100024, Peoples R China
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2023年 / 62卷 / 01期
关键词：
terahertz time-domain spectroscopy; transverse optical phonon; TEMPERATURE-DEPENDENCE; SCATTERING; PHONONS;
D O I：
10.35848/1347-4065/acae52
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The transmission spectra of terahertz (THz) waves through Fe doped beta-Ga2O3 in the range of 1-6 THz by air-plasma-based THz time-domain spectroscopy (THz-TDS) at room temperature and their temperature dependence between 90 and 500 K in the range of 0.7 THz-1.8 THz have been measured. We estimated the complex dielectric constants by fitting the spectra with the classical damped oscillator dispersion model and obtained the anisotropic lowest transverse optical (TO1) phonon frequencies. The values at room temperature agreed with the reported values, and no significant temperature dependence was observed. (c) 2023 The Japan Society of Applied Physics
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