Please use this identifier to cite or link to this item: http://idr.nitk.ac.in/jspui/handle/123456789/13397
Title: The third-order nonlinear optical properties of novel styryl dyes
Authors: Shettigar, S.
Umesh, G.
Poornesh, P.
Manjunatha, K.B.
Asiri, A.M.
Issue Date: 2009
Citation: Dyes and Pigments, 2009, Vol.83, 2, pp.207-210
Abstract: 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 ? electron density and the effective two-photon absorption cross-section 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. 2009 Elsevier Ltd. All rights reserved.
URI: http://idr.nitk.ac.in/jspui/handle/123456789/13397
Appears in Collections:1. Journal Articles

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