Ultrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions

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dc.creatorKamaraju, N
dc.creatorKumar, Sunil
dc.creatorKarthikeyan, B.
dc.creatorKakade, Bhalchandra
dc.creatorPillai, Vijayamohanan K.
dc.creatorSood, A. K.
dc.date2008-07-09
dc.date.accessioned2026-07-07T09:49:23Z
dc.date.available2026-07-07T09:49:23Z
dc.descriptionMicrowave 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 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,beata ~250 cm/GW (650 cm/GW) and nonlinear index, gamma ~ 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.
dc.description15 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0807.1441
dc.identifierhttp://arxiv.org/abs/0807.1441
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/164565
dc.subjectMaterials Science
dc.subjectOther Condensed Matter
dc.titleUltrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions
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