• DocumentCode
    1769989
  • Title

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

  • Author

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

  • Author_Institution
    Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
  • fYear
    2014
  • fDate
    8-13 June 2014
  • Firstpage
    1
  • Lastpage
    2
  • 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.
  • Keywords
    bismuth compounds; electric admittance; insulating thin films; photoexcitation; surface scattering; topological insulators; Bi2Se3; conductance; hot-Dirac electron surface scattering; photogenerated electrons; surface-scattering rate; topological insulator thin films; ultrafast photoexcitation; ultrafast terahertz scattering dynamics; Educational institutions; Optical pumping; Optical scattering; Spectroscopy; Topological insulators; Ultrafast optics;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Lasers and Electro-Optics (CLEO), 2014 Conference on
  • Conference_Location
    San Jose, CA
  • Type

    conf

  • Filename
    6988651
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1769989