Venkatram, N and Kumar, R Sai Santosh and Rao, D Narayana and Medda, S K and De, Sucheta and De, Goutam (2006) Nonlinear optical absorption and switching properties of gold nanoparticle doped SiO(2)-TiO(2) sol-gel films. Journal of Nanoscience and Nanotechnology , 6 (7). 1990-1994 . ISSN 1533-4880

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Abstract

The nonlinear optical absorption and switching properties of sol-gel derived of Au nanoparticle doped SiO(2)-TiO(2) sol-gel films having different Au-surface plasmon absorption positions are reported in this paper. The Au nanoparticles are embedded in SiO(2) and SiO(2)-TiO(2) mixed glassy film matrices with different refractive index values. To study the nonlinear absorption properties, lasers with three different wavelengths are used. The optical switching behavior is studied by using the pump-probe technique with 532 nm as the excitation wavelength. Ground state conduction band, surface plasmon band, and the free carrier band are taken as three level model to explain theoretically the obtained RSA and SA behaviors.

Item Type:	Article
Uncontrolled Keywords:	saturable absorption; reverse saturable absorption; optical switching; surface plasmon resonance
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Mrs Chandana Patra
Date Deposited:	02 Jan 2012 11:50
Last Modified:	05 Apr 2016 09:43
URI:	http://cgcri.csircentral.net/id/eprint/56

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