Thermally induced nonlinear refraction of gold and silver polyvinvinylpyrrolidone nanofluid

Esmaeil, Shahriari and Mat Yunus, Wan Mahmood (2010) Thermally induced nonlinear refraction of gold and silver polyvinvinylpyrrolidone nanofluid. Journal of Optoelectronics and Advanced Materials, 12 (11). pp. 2306-2310. ISSN 1454-4164

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Abstract

The nonlinear refractive index of metal Au and Ag nano-fluids prepared by γ-radiation method was investigated by a single beam Z-scan technique. Under CW 532 nm laser excitation with power output of 40 mW, the Au and Ag nano-fluids show a large thermal-induced nonlinear refractive index. In the present work it was determined that the nonlinear refractive index for both Ag and Au nano-fluids are -4.80×10-8 cm2/W and -3.85×10-8 cm2/W respectively. The values of Δn0 for both samples were also calculated to be -2.05×10-4 and -1.64×10-4 respectively. Our measurements also confirmed that the nonlinear phenomenon was caused by the self-defocusing process making them good candidates for non linear optical devices.

Item Type:Article
Keyword:Nonlinear Refractive Index; Optical Materials; Nanoparticles
Subject:Refractive index.
Subject:Optical materials.
Subject: Nanoparticles.
Faculty or Institute:Faculty of Science
Publisher:INOE Publishing House
ID Code:17400
Deposited By: Najwani Amir Sariffudin
Deposited On:14 May 2012 08:25
Last Modified:14 May 2012 08:25

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