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

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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 (similar to 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
Publisher
SPRINGER
Issue Date
2009-09
Language
English
Article Type
Article
Keywords

C-60-DERIVED NANOTUBES; SATURABLE ABSORBER; POLYMER; FEMTOSECOND; ALIGNMENT

Citation

APPLIED PHYSICS B-LASERS AND OPTICS, v.97, no.1, pp.157 - 162

ISSN
0946-2171
DOI
10.1007/s00340-009-3532-x
URI
http://hdl.handle.net/10203/212743
Appears in Collection
PH-Journal Papers(저널논문)
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