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Chih Wei Luo, Hsueh-Ju Chen, Chien Ming Tu, Chia Ching Lee, Shin An Ku, Wen Yen Tzeng, Tien Tien Yeh, Meng Chi Chiang, Harn Jiunn Wang, Wei Chen Chu, Jiunn-Yuan Lin, Kaung Hsiung Wu, Jenh Yih Juang, Takayoshi Kobayashi, Cheng-Maw Cheng, Ching-Hung Chen, Ku-Ding Tsuei, Helmuth Berger, Raman Sankar, Fang Cheng Chou and Hung Duen Yang THz Generation and Detection on Dirac Fermions in Topological Insulators Advanced Optical Materials 1

Article first published online: 30 JUL 2013 | DOI: 10.1002/adom.201300221

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THz radiation is generated from topological insulators using femtosecond laser pulses. Two-channel free carrier absorption with bulk and surface carriers is indispensable to explaining the strong dependence of THz emission power on the carrier concentration. The characteristics of THz emission provide valuable information regarding the fundamental properties of Dirac fermions.

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