Nature Communications (May 2017)

Unconventional double-bended saturation of carrier occupation in optically excited graphene due to many-particle interactions

  • Torben Winzer,
  • Martin Mittendorff,
  • Stephan Winnerl,
  • Henry Mittenzwey,
  • Roland Jago,
  • Manfred Helm,
  • Ermin Malic,
  • Andreas Knorr

DOI
https://doi.org/10.1038/ncomms15042
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 6

Abstract

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Saturable absorption, a technologically relevant property of graphene, is usually explained with Pauli blocking of optically driven carriers in the strong-excitation regime. Here, Winzeret al. reveal a new saturation regime at low excitations, resulting in a double-bended saturation behaviour.