Nano Archive

Ultrafast electron dynamics and cubic optical nonlinearity of freestanding thin film of double walled carbon nanotubes

Kamaraju, N and Kumar, Sunil and Karthikeyan, B. and Moravsky, Alexander and Loutfy, R. O and Sood, A. K. (2008) Ultrafast electron dynamics and cubic optical nonlinearity of freestanding thin film of double walled carbon nanotubes. Applied Physics Letters, 93 (9). 091903 . ISSN 00036951

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Abstract

Ultrafast degenerate pump-probe experiments performed on a freestanding film of double walled carbon nanotubes near the first metallic transition energy of outer tube show ultrafast (97 fs) photobleaching followed by a photoinduced absorption with a slow relaxation of 1.8 ps. Femtosecond closed and open aperture z-scan experiments carried out at the same excitation energy show saturation absorption and negative cubic nonlinearity. From these measurements, real and imaginary part of the third order nonlinear susceptibility are estimated to be Re(chi(3))~−2.2×10−9 esu and Im(chi(3))~4.5×10−11 esu.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4389
Deposited By:JNCASR
Deposited On:02 Apr 2009 11:23
Last Modified:02 Apr 2009 11:23

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