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Bundling influence on ultrafast optical nonlinearities of single-walled carbon nanotubes in suspension and composite film

Applied Physics B: Lasers and Optics, ISSN: 0946-2171, Vol: 97, Issue: 1, Page: 157-162
2009
  • 13
    Citations
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    Usage
  • 18
    Captures
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    Mentions
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Metrics Details

  • Citations
    13
    • Citation Indexes
      13
  • Captures
    18

Article Description

Nonlinear optical characteristics of single-walled carbon nanotubes (SWCNTs) dispersed in dichlorobenzene and imbedded in polymer were investigated at 800 nm using the time-resolved optical Kerr gate technique. For systematic study of the influence of SWCNT bundling on optical nonlinearities, SWCNT solutions with different concentrations and a series of SWCNT/polymer composites deposited on glass substrates with different concentrations and thicknesses were prepared. The nonlinear response was comparable to the pulse duration of the laser used (∼ 90 fs) both in SWCNT solutions and SWCNT/polymer composites. Over three orders of magnitude enhancement was observed in the third-order nonlinear susceptibility of SWCNT/polymer composite film compared with that of SWCNT solution. An appreciable reduction of microscopic and macroscopic nonlinearities was observed with increasing SWCNT concentrations due to stronger bundling of SWCNTs. © 2009 Springer-Verlag.

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