Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films
學年 106
學期 1
出版(發表)日期 2017-11-06
作品名稱 Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films
作品名稱(其他語言)
著者 Tu, C.-M.; Chen, Y.-C.; Huang, P.; Chuang, P.-Y.; Lin, M.-Y.; Cheng, C.-M.; Lin, J.-Y.; Juang, J.-Y.; Wu, K.-H.; Huang, J.-C.A.; Pong, W.-F.; Kobayashi, T.; Luo, C.-W.
單位
出版者
著錄名稱、卷期、頁數 Physical Review B-Condensed Matter 96(19), p.195407
摘要 We report on helicity-dependent terahertz emissions that originate from the helicity-dependent photocurrents in topological insulator S b 2 T e 3 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.
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語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/115551 )