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

doi:10.1109/IRMMW-THz.2016.7758886

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Publisher	IEEE Computer Society
ISBN (Electronic)	9781467384858
DOIs	https://doi.org/10.1109/IRMMW-THz.2016.7758886
Publication status	Published - 2016 Nov 28
Event	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Copenhagen, Denmark Duration: 2016 Sept 25 → 2016 Sept 30

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume	2016-November
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Other

Other	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Country/Territory	Denmark
City	Copenhagen
Period	16-09-25 → 16-09-30

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/IRMMW-THz.2016.7758886

Cite this

Tu, C. M., Chen, Y. C., Huang, P., Chuang, P. Y., Lin, M. Y., Luo, C. W., Cheng, C. M., Lin, J. Y., Huang, J. C., Pong, W. F., & Kobayashi, T. (2016). Helicity-dependent terahertz radiation from topological insulator Sb₂Te₃ thin film by femtosecond optical excitation. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 Article 7758886 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz.2016.7758886

Tu, Chien Ming ; Chen, Yi Cheng ; Huang, Ping et al. / Helicity-dependent terahertz radiation from topological insulator Sb₂Te₃ thin film by femtosecond optical excitation. 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society, 2016. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

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title = "Helicity-dependent terahertz radiation from topological insulator Sb2Te3 thin film by femtosecond optical excitation",

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.",

author = "Tu, \{Chien Ming\} and Chen, \{Yi Cheng\} and Ping Huang 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 Takayoshi Kobayashi",

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year = "2016",

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doi = "10.1109/IRMMW-THz.2016.7758886",

language = "English",

series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",

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Tu, CM, Chen, YC, Huang, P, Chuang, PY, Lin, MY, Luo, CW, Cheng, CM, Lin, JY, Huang, JC, Pong, WF & Kobayashi, T 2016, Helicity-dependent terahertz radiation from topological insulator Sb₂Te₃ thin film by femtosecond optical excitation. in 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016., 7758886, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2016-November, IEEE Computer Society, 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016, Copenhagen, Denmark, 16-09-25. https://doi.org/10.1109/IRMMW-THz.2016.7758886

Helicity-dependent terahertz radiation from topological insulator Sb₂Te₃ thin film by femtosecond optical excitation. / Tu, Chien Ming; Chen, Yi Cheng; Huang, Ping et al.
41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society, 2016. 7758886 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Helicity-dependent terahertz radiation from topological insulator Sb2Te3 thin film by femtosecond optical excitation

AU - Tu, Chien Ming

AU - Chen, Yi Cheng

AU - Huang, Ping

AU - Chuang, Pei Yu

AU - Lin, Ming Yu

AU - Luo, Chih Wei

AU - Cheng, Cheng Maw

AU - Lin, Jiunn Yuan

AU - Huang, Jung Chun

AU - Pong, Way Faung

AU - Kobayashi, Takayoshi

PY - 2016/11/28

Y1 - 2016/11/28

N2 - 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.

AB - 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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BT - 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016

PB - IEEE Computer Society

T2 - 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016

Y2 - 25 September 2016 through 30 September 2016

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Tu CM, Chen YC, Huang P, Chuang PY, Lin MY, Luo CW et al. Helicity-dependent terahertz radiation from topological insulator Sb₂Te₃ thin film by femtosecond optical excitation. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society. 2016. 7758886. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/IRMMW-THz.2016.7758886