Nano Archive

Large nonlinear absorption and refraction coefficients of carbon nanotubes estimated from femtosecond z-scan measurements

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.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://link.aip.org/link/?APPLAB/91/251103/1

Abstract

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.

Item Type:Article
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
ID Code:3413
Deposited By:JNCASR
Deposited On:20 Jan 2009 11:05
Last Modified:20 Jan 2009 11:05

Repository Staff Only: item control page