Terahertz Time-domain Spectroscopy System Using Sub-Bandgap Excitation of Photo-conductive Antenna Made with Low-Temperature Grown Gallium Arsenide

被引：0
|
作者：
Furuya, Hideaki Kitahara Takashi [1 ]
Escano, Mary Clare [1 ]
Tani, Masahiko [1 ]
机构：
[1] Univ Fukui, Res Ctr Dev Far Infrared Reg, Fukui 9108507, Japan
来源：
2022 47TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ 2022) | 2022年
关键词：
D O I：
10.1109/IRMMW-THz50927.2022.9895475
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Terahertz time domain spectroscopy system is constructed using photoconductive emitter and detector antennas operated with sub-bandgap excitations of low-temperature grown gallium arsenide. The system characteristics are investigated using femtosecond lasers with emission wavelengths at 1 mu m and 1.5 mu m. The same level of dynamic range with the 800-nm above bandgap excitation was obtained with the 1.5-mu m sub-bandgap excitation, while a lower dynamic range was obtained with the 1-mu m sub-bandgap excitation.
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