The third-order nonlinear optical properties of novel styryl dyes

Shettigar, Seetharam and Umesh, G and Poornesh, P and Manjunatha, K B and Asiri, Abdullah Mohammed (2009) The third-order nonlinear optical properties of novel styryl dyes. Dyes and Pigments, 89. pp. 207-210. ISSN 0143-7208

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The third-order nonlinear optical properties of two novel styryl dyes, namely, 1,3-diethyl-5-(4-methoxybenzylidene)- 2-thioxodihydropyrimidine-4,6(1H,5H)-dione and 5-(3,4-dimethoxybenzylidene)-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione were studied using the Z-scan technique employing 7 ns laser pulses at 532 nm. The nonlinear refractive index, nonlinear absorption coefficient, magnitude of effective third-order susceptibility and coupling factor were determined. The optical power limiting behavior of the colorants was ascribed to two-photon absorption phenomenon. Nonlinear absorption cross-section increased with increase in p electron density and the effective two-photon absorption crosssection was two orders of magnitude larger than those of commercially available azo compounds. The results suggest that these colorants offer promise as nonlinear optical materials for device applications

Item Type: Article
Additional Information: � 2009 Elsevier Ltd.
Uncontrolled Keywords: Styryl dyes Z-scan Nonlinear refraction Nonlinear absorption Coupling factor Optical power limiting
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 20 Aug 2013 07:10
Last Modified: 20 Aug 2013 07:10

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