Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films

機構典藏 > College of Sciences > Graduate Institute & Department of Physics > Journal Article > Item 987654321/115551

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/115551

Title:	Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films
Authors:	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.
Date:	2017-11-06
Issue Date:	2018-11-08 12:11:42 (UTC+8)
Publisher:	APS Physics
Abstract:	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.
Relation:	Physical Review B-Condensed Matter 96(19), p.195407
DOI:	10.1103/PhysRevB.96.195407
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

Files in This Item:

File	Description	Size	Format
Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films.pdf		5253Kb	Adobe PDF	2	View/Open
index.html		0Kb	HTML	195	View/Open