Nature Communications (Apr 2016)

Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator

  • Flavio Giorgianni,
  • Enrica Chiadroni,
  • Andrea Rovere,
  • Mariangela Cestelli-Guidi,
  • Andrea Perucchi,
  • Marco Bellaveglia,
  • Michele Castellano,
  • Domenico Di Giovenale,
  • Giampiero Di Pirro,
  • Massimo Ferrario,
  • Riccardo Pompili,
  • Cristina Vaccarezza,
  • Fabio Villa,
  • Alessandro Cianchi,
  • Andrea Mostacci,
  • Massimo Petrarca,
  • Matthew Brahlek,
  • Nikesh Koirala,
  • Seongshik Oh,
  • Stefano Lupi

DOI
https://doi.org/10.1038/ncomms11421
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 6

Abstract

Read online

The terahertz response of topological insulator surface states, in which relativistic electrons are protected from backscattering, possesses potential optic and plasmonic applications. Here, the authors demonstrate a nonlinear absorption response of Bi2Se3to terahertz electric fields.