• 文献标题:   Broadband saturable absorption and optical limiting in graphene-polymer composites
  • 文献类型:   Article
  • 作  者:   HUSAINI S, SLAGLE JE, MURRAY JM, GUHA S, GONZALEZ LP, BEDFORD RG
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951
  • 通讯作者地址:   USAF
  • 被引频次:   31
  • DOI:   10.1063/1.4805060
  • 出版年:   2013

▎ 摘  要

Nonlinear optical properties of a graphene-polyvinyl alcohol composite are studied using an irradiance-scan setup. The measurements are carried out at 785 nm and 1064 nm in the nanosecond and picoseconds temporal regimes, respectively. It is shown that the output fluence readily clamps with increasing input and graphene concentration due to nonlinear absorption and scattering. Furthermore, the nonlinear transmission demonstrates weak saturable absorption followed by strong optical limiting. The nonlinear coefficients beta(eff) and I-sat calculated via numerical fitting show that beta(eff) depends on the graphene content and increases significantly in nanosecond regime due to high degree of thermally induced nonlinear scattering. (C) 2013 AIP Publishing LLC.