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

Tu, Chien Ming LU ; Chen, Yi Cheng; Huang, Ping; Chuang, Pei Yu; Lin, Ming Yu; Luo, Chih Wei; Cheng, Cheng Maw; Lin, Jiunn Yuan; Huang, Jung Chun and Pong, Way Faung, et al. (2016) 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Abstract

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.

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organization
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
external identifiers
  • scopus:85006175074
ISBN
9781467384858
DOI
10.1109/IRMMW-THz.2016.7758886
language
English
LU publication?
yes
id
3701d0b9-3ab9-44dc-b375-9f7a387a2a27
date added to LUP
2016-12-30 08:54:31
date last changed
2017-01-01 08:44:52
@inproceedings{3701d0b9-3ab9-44dc-b375-9f7a387a2a27,
  abstract     = {<p>We report on terahertz radiation from topological insulator (TI) Sb<sub>2</sub>Te<sub>3</sub> 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.</p>},
  author       = {Tu, Chien Ming and Chen, Yi Cheng and Huang, Ping and Chuang, Pei Yu and Lin, Ming Yu and Luo, Chih Wei and Cheng, Cheng Maw and Lin, Jiunn Yuan and Huang, Jung Chun and Pong, Way Faung and Kobayashi, Takayoshi},
  booktitle    = {41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016},
  isbn         = {9781467384858},
  language     = {eng},
  month        = {11},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Helicity-dependent terahertz radiation from topological insulator Sb<sub>2</sub>Te<sub>3</sub> thin film by femtosecond optical excitation},
  url          = {http://dx.doi.org/10.1109/IRMMW-THz.2016.7758886},
  year         = {2016},
}