Nano Archive

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

Shahriari, E. and Yunus, W.Mahmood and Naghavi, K. (2010) Z-scan determination of two-photon absorption in Ag nano-fluid prepared using gamma-radiation methods. JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS . 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 4.71x10(-3) M concentrations and was radiated at different doses of gamma-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 5.8x10(-3), 4.5x10(-3) and 3.2x10(-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
Subjects:Physical Science > Nano objects
ID Code:9755
Deposited By:CSMNT
Deposited On:28 Oct 2010 10:17
Last Modified:28 Oct 2010 10:17

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