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Z-scan determination of two-photon absorption in Ag nano-fluid prepared using y-radiation methods.

Shahriari, Esmaeil and Mat Yunus, Wan Mahmood and Naghavi, Kazem (2010) Z-scan determination of two-photon absorption in Ag nano-fluid prepared using y-radiation methods. Journal of Optoelectronics and Advanced Materials, 12 (8 ). pp. 1676-1679. ISSN 1454-4164

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Abstract

In this work the two-photon absorption (TPA) coefficients of Ag nano-fluid was measured using Z-scan technique. The Ag nano-fluid sample was prepared at 4.71×10-3 M concentrations and was radiated at different doses of γ-radiation. The conventional single beam Z-scan method with open aperture technique was used to measure the nonlinear absorption coefficient. A CW laser operated at 532 nm wavelength with output power of 40 mW was employed as the excitation source. The nonlinear absorption coefficient obtained was 5.8×10-3, 4.5×10-3 and 3.2×10-3 cm/W. The TPA processes was confirmed by optical limiting experimental data for the same laser beam excitation. The results show that the particle size gives a significant effect to the TPA coefficient.

Item Type:Article
Keyword:Nonlinear Absorption; Z-scan technique; Nanoparticles;, Optical limiting.
Subject:Nonlinear optics.
Subject:Physics.
Faculty or Institute:Faculty of Science
Publisher:INOE Publishing House
ID Code:17674
Deposited By: Najwani Amir Sariffudin
Deposited On:13 Dec 2011 07:15
Last Modified:13 Dec 2011 07:15

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