Terahertz dynamics of topological insulator Bi2Se3: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering

Sangwan Sim; Matthew Brahlek; Nikesh Koirala; Soonyoung Cha; Seongshik Oh; Hyunyong Choi

doi:10.1364/cleo_qels.2014.fth3c.7

Terahertz dynamics of topological insulator Bi₂Se₃: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering

Sangwan Sim, Matthew Brahlek, Nikesh Koirala, Soonyoung Cha, Seongshik Oh, Hyunyong Choi

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We present ultrafast terahertz scattering dynamics in topological insulator Bi₂Se₃: thin films. Upon photoexcitation, the surface-scattering rate is increased, resulting in decrease of conductance. At high temperature, however, the photo-generated electrons suppress the surface scattering.

Original language	English
Title of host publication	CLEO
Subtitle of host publication	QELS_Fundamental Science, CLEO_QELS 2014
Publisher	Optical Society of America (OSA)
ISBN (Print)	9781557529992, 9781557529992
DOIs	https://doi.org/10.1364/cleo_qels.2014.fth3c.7
Publication status	Published - 2014
Event	CLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose, CA, United States Duration: 2014 Jun 8 → 2014 Jun 13

Publication series

Name	Optics InfoBase Conference Papers
ISSN (Electronic)	2162-2701

Other

Other	CLEO: QELS_Fundamental Science, CLEO_QELS 2014
Country/Territory	United States
City	San Jose, CA
Period	14/6/8 → 14/6/13

All Science Journal Classification (ASJC) codes

Instrumentation
Atomic and Molecular Physics, and Optics

Access to Document

10.1364/cleo_qels.2014.fth3c.7

Cite this

@inproceedings{6c32d397c2e6494cb288962afb0f245a,

title = "Terahertz dynamics of topological insulator Bi2Se3: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering",

abstract = "We present ultrafast terahertz scattering dynamics in topological insulator Bi2Se3: thin films. Upon photoexcitation, the surface-scattering rate is increased, resulting in decrease of conductance. At high temperature, however, the photo-generated electrons suppress the surface scattering.",

author = "Sangwan Sim and Matthew Brahlek and Nikesh Koirala and Soonyoung Cha and Seongshik Oh and Hyunyong Choi",

year = "2014",

doi = "10.1364/cleo_qels.2014.fth3c.7",

language = "English",

isbn = "9781557529992",

series = "Optics InfoBase Conference Papers",

publisher = "Optical Society of America (OSA)",

booktitle = "CLEO",

note = "CLEO: QELS_Fundamental Science, CLEO_QELS 2014 ; Conference date: 08-06-2014 Through 13-06-2014",

}

Sim, S, Brahlek, M, Koirala, N, Cha, S, Oh, S & Choi, H 2014, Terahertz dynamics of topological insulator Bi₂Se₃: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering. in CLEO: QELS_Fundamental Science, CLEO_QELS 2014. Optics InfoBase Conference Papers, Optical Society of America (OSA), CLEO: QELS_Fundamental Science, CLEO_QELS 2014, San Jose, CA, United States, 14/6/8. https://doi.org/10.1364/cleo_qels.2014.fth3c.7

Terahertz dynamics of topological insulator Bi₂Se₃: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering. / Sim, Sangwan; Brahlek, Matthew; Koirala, Nikesh et al.
CLEO: QELS_Fundamental Science, CLEO_QELS 2014. Optical Society of America (OSA), 2014. (Optics InfoBase Conference Papers).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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