@article{ba4dc172222d45229beba36d7431434a,
title = " Helicity-dependent terahertz emission spectroscopy of topological insulator S b 2 T e 3 thin films ",
abstract = "We report on helicity-dependent terahertz emissions that originate from the helicity-dependent photocurrents in topological insulator Sb2Te3 thin films due to ultrafast optical excitation. The polarity of the emitted terahertz radiation is controlled by both the incident angle and the helicity of optical pulses. Using an unprecedented decomposition-recombination procedure in the time domain, the signals of the Dirac fermions are fully separated from bulk contributions. These results provide insights into the optical coupling of topological surface states and open up opportunities for applying helicity-dependent terahertz emission spectroscopy in spintronics.",
author = "Tu, {Chien Ming} and Chen, {Yi Cheng} and Ping Huang and Chuang, {Pei Yu} and Lin, {Ming Yu} and Cheng, {Cheng Maw} and Lin, {Jiunn Yuan} and Juang, {Jenh Yih} and Wu, {Kaung Hsiung} and Huang, {Jung Chun A.} and Pong, {Way Faung} and Takayoshi Kobayashi and Luo, {Chih Wei}",
note = "Funding Information: This work was supported by Ministry of Science and Technology, Taiwan (Grants No. 103-2119-M-009-004-MY3, No. 103-2628-M-009-002-MY3, and No. 106-2628-M-009 -003-MY3) and Ministry of Education through the Aiming for the Top University Program at National Chiao Tung University. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = nov,
day = "6",
doi = "10.1103/PhysRevB.96.195407",
language = "English",
volume = "96",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "19",
}