Helicity-Dependent Terahertz Radiation from Topological Insulator Sb2Te3 Thin Film by Femtosecond Optical Excitation

標題:	Helicity-Dependent Terahertz Radiation from Topological Insulator Sb2Te3 Thin Film by Femtosecond Optical Excitation
作者:	Tu, Chien-Ming Chen, Yi-Cheng Huang, Ping Chuang, Pei-Yu Lin, Ming-Yu Luo, Chih-Wei Cheng, Cheng-Maw Lin, Jiunn-Yuan Huang, Jung-Chun Pong, Way-Faung Kobayashi, Takayoshi 電子物理學系物理研究所 Department of Electrophysics Institute of Physics
公開日期:	2016
摘要:	We report on terahertz radiation from topological insulator (TI)Sb2Te3 thin film under ultrafast optical excitation with different helicity. Polarity-reversals of the emitted THz radiation were observed as the helicity of optical pulses reversed. The observed phenomena are coincident with the characteristics of the helicity-dependent photocurrent on TIs. Our work demonstrates the potential applications of surface photocurrents on TIs for opto-spintronics devices.
URI:	http://hdl.handle.net/11536/134543
ISBN:	978-1-4673-8485-8
ISSN:	2162-2027
期刊:	2016 41ST INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
Appears in Collections:	Conferences Paper