Kamaraju, N and Kumar, Sunil and Karthikeyan, B and Kakade, Bhalchandra and Pillai, Vijayamohanan K and Sood, AK (2009) Ultrafast Switching Time and Third Order Nonlinear Coefficients of Microwave Treated Single Walled Carbon Nanotube Suspensions. In: International Conference on Nanoscience and Technology, FEB 27-29, 2008, Chennai, India, pp. 5550-5554.
![]()
|
PDF
2.pdf - Published Version Download (112kB) |
Abstract
Microwave treated water soluble and amide functionalized single walled carbon nanotubes have been investigated using femtosecond degenerate pump-probe and nonlinear transmission experiments. The time resolved differential transmission using 75 femtosecond pulse with the central wavelength of 790 nm shows a bi-exponential ultrafast photo-bleaching with time constants of 160 fs (130 fs) and 920 fs (300 fs) for water soluble (amide functionalized) nanotubes. Open and closed aperture z-scans show saturation absorption and positive (negative) nonlinear refraction for water soluble (amide functionalized) nanotubes. Two photon absorption coefficient, beta(0) similar to 250 cm/GW (650 cm/GW) and nonlinear index, gamma similar to 15 cm(2)/pW (-30 cm(2)/pW) are obtained from the theoretical fit in the saturation limit to the data for two types of nanotubes.
Item Type: | Conference Paper |
---|---|
Publication: | Journal of Nanoscience and Nanotechnology |
Publisher: | American Scientific Publishers |
Additional Information: | Copyright of this article belongs to American Scientific Publishers. |
Keywords: | Ultra-Fast Switching;SWCNT; Nonlinear Optical Coefficients. |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 15 Dec 2009 09:44 |
Last Modified: | 19 Sep 2010 05:45 |
URI: | http://eprints.iisc.ac.in/id/eprint/23268 |
Actions (login required)
![]() |
View Item |