N, Kumaraju and Kumar, Sunil and Sood, A. K. and Guha, Shekhar and Krishnamurthy, Srinivasan and Rao, C. N. R (2007) Large nonlinear absorption and refraction coefficients of carbon nanotubes estimated from femtosecond z-scan measurements. APPLIED PHYSICS LETTERS, 91 . p. 251103.
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Official URL: http://link.aip.org/link/?APPLAB/91/251103/1
Nonlinear transmission of 80 and 140 fs pulsed light with 0.79 µm wavelength through single walled carbon nanotubes suspended in water containing sodium dodecyl sulfate is studied. Pulse-width independent saturation absorption and negative cubic nonlinearity are observed, respectively, in open and closed aperture z-scan experiments. The theoretical expressions derived to analyze the z-dependent transmission in the saturable limit require two photon absorption coefficient beta0~1.4 cm/MW and a nonlinear index gamma~−5.5×10−11 cm2/W to fit the data.
|Subjects:||Physical Science > Nanophysics|
Material Science > Nanochemistry
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||20 Jan 2009 11:05|
|Last Modified:||20 Jan 2009 11:05|
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