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Nonlinear broadband photoluminescence of graphene induced by femtosecond laser irradiation

Source: Phys. Rev. B 82, 081408 (2010); doi:10.1103/PhysRevB.82.081408

Published 18 August 2010

PACS
  • 78.55.Kz
    Photoluminescence in solid organic materials
  • 42.65.Ky
    Optical frequency conversion; harmonic generation
  • 78.66.Tr
    Optical properties of fullerenes and related materials (thin films)
  • 81.05.U-
    Carbon/carbon-based materials
  • YEAR: 2010
PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef APS
Wei-Tao Liu,1 S. W. Wu,2 P. J. Schuck,2 M. Salmeron,2 Y. R. Shen,1 and F. Wang1
1Physics Department, University of California at Berkeley, Berkeley, California 94720, USA
2The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Upon femtosecond laser irradiation, a bright, broadband photoluminescence is observed from graphene at frequencies well above the excitation frequency. Analyses show that it arises from radiative recombination of a broad distribution of nonequilibrium electrons and holes, generated by rapid scattering between photoexcited carriers within tens of femtoseconds after the optical excitation. Its highly unusual characteristics come from the unique electronic and structural properties of graphene. ©2010 The American Physical Society
History: Received 28 July 2010; published 18 August 2010
Permalink: http://link.aps.org/abstract/PRB/v82/e081408
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