Helicity-dependent terahertz radiation from topological insulator Sb2Te3 thin film by femtosecond optical excitation

Chien Ming Tu, Yi Cheng Chen, Ping Huang, Pei Yu Chuang, Ming Yu Lin, Chih Wei Luo, Cheng Maw Cheng, Jiunn Yuan Lin, Jung Chun Huang, Way Faung Pong, Takayoshi Kobayashi

研究成果: Conference contribution同行評審

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.

原文English
主出版物標題41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
發行者IEEE Computer Society
ISBN(電子)9781467384858
DOIs
出版狀態Published - 28 十一月 2016
事件41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Copenhagen, Denmark
持續時間: 25 九月 201630 九月 2016

出版系列

名字International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
2016-November
ISSN(列印)2162-2027
ISSN(電子)2162-2035

Conference

Conference41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
國家/地區Denmark
城市Copenhagen
期間25/09/1630/09/16

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