Premium
Terahertz Generation: THz Generation and Detection on Dirac Fermions in Topological Insulators (Advanced Optical Materials 11/2013)
Author(s) -
Luo Chih Wei,
Chen HsuehJu,
Tu Chien Ming,
Lee Chia Ching,
Ku Shin An,
Tzeng Wen Yen,
Yeh Tien Tien,
Chiang Meng Chi,
Wang Harn Jiunn,
Chu Wei Chen,
Lin JiunnYuan,
Wu Kaung Hsiung,
Juang Jenh Yih,
Kobayashi Takayoshi,
Cheng ChengMaw,
Chen ChingHung,
Tsuei KuDing,
Berger Helmuth,
Sankar Raman,
Chou Fang Cheng,
Yang Hung Duen
Publication year - 2013
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201370070
Subject(s) - terahertz radiation , topological insulator , femtosecond , materials science , dirac fermion , optoelectronics , dirac (video compression format) , laser , graphene , physics , optics , condensed matter physics , nanotechnology , quantum mechanics , neutrino
THz radiation is generated from topological insulators by C. W. Luo, J.‐Y. Lin, and co‐workers using an 800 nm femtosecond laser. 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 surface carriers in topological insulators are significantly better absorbers of THz radiation than bulk carriers at room temperature. Moreover, the characteristics of THz emission provide valuable information on page 804 regarding the fundamental properties of Dirac fermions.