Kamaraju, N. ; Kumar, Sunil ; Karthikeyan, B. ; Kakade, Bhalchandra ; Pillai, Vijayamohanan K. ; Sood, A. K. (2009) Ultrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions Journal of Nanoscience and Nanotechnology, 9 (9). pp. 5550-5554. ISSN 1533-4880
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Official URL: http://www.ingentaconnect.com/search/article?optio...
Related URL: http://dx.doi.org/10.1166/jnn.2009.1184
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, β0 ~ 250 cm/GW (650 cm/GW) and nonlinear index, γ ~ 15 cm2/pW (-30 cm2/pW) are obtained from the theoretical fit in the saturation limit to the data for two types of nanotubes.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Scientific Publishers. |
Keywords: | Ultra-fast Switching; SWCNT; Nonlinear Optical Coefficients |
ID Code: | 54809 |
Deposited On: | 12 Aug 2011 12:52 |
Last Modified: | 18 May 2016 07:18 |
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