@inproceedings{e83b1625a12a4170b7701fe3466bdb0e,
title = "Ultrafast dynamics in topological insulators",
abstract = "Ultrafast dynamics of carriers and phonons in topological insulators CuxBi2Se3-y (x=0, 0.1, 0.125, y=0, 1) was studied using femtosecond optical pump-probe spectroscopy. One damped oscillation was clearly observed in the transient reflectivity changes (ΔR/R), which is assigned to the coherent optical phonon (A1g 1). According to the red shift of A1g 1 phonon frequency, the Cu atoms in CuxBi2Se3 crystals may predominantly intercalated between pair of the quintuple layers. Moreover, the carrier dynamics in the Dirac-cone surface state is significantly different from that in bulk state, which was investigated using optical pump mid-infrared (mid-IR) probe spectroscopy. The rising time and decay time of the negative component in ΔR/R, which is assigned to carrier relaxation in Dirac cone, is 1.62 ps and 20.5 ps, respectively.",
keywords = "Pump-probe spectroscopy, Topological insulators, Ultrafast dynamics",
author = "Chih-Wei Luo and Chen, {H. J.} and Wang, {H. J.} and Ku, {S. A.} and Kaung-Hsiung Wu and Uen, {T. M.} and Jenh-Yih Juang and Jiunn-Yuan Lin and Ben-Li Young and T. Kobayashi and R. Sankar and Chou, {F. C.} and H. Berger and Gu, {G. D.}",
year = "2013",
month = may,
day = "30",
doi = "10.1117/12.2001954",
language = "English",
isbn = "9780819493927",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Ultrafast Phenomena and Nanophotonics XVII",
note = "Ultrafast Phenomena and Nanophotonics XVII ; Conference date: 03-02-2013 Through 06-02-2013",
}