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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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 languageEnglish (US)
Title of host publicationCLEO
Subtitle of host publicationQELS_Fundamental Science, CLEO_QELS 2014
PublisherOptical Society of America (OSA)
ISBN (Print)9781557529992
StatePublished - 2014
EventCLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose, CA, United States
Duration: Jun 8 2014Jun 13 2014

Publication series

NameOptics InfoBase Conference Papers


OtherCLEO: QELS_Fundamental Science, CLEO_QELS 2014
Country/TerritoryUnited States
CitySan Jose, CA

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Terahertz dynamics of topological insulator Bi<sub>2</sub>Se<sub>3</sub>: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering'. Together they form a unique fingerprint.

Cite this