Degenerate four wave mixing in some metal phthalocyanines and naphthalocyanines

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Degenerate four wave mixing in some metal phthalocyanines and naphthalocyanines

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Title: Degenerate four wave mixing in some metal phthalocyanines and naphthalocyanines
Author: Unnikrishnan, K P; Jayan, Thomas; V P N Nampoori; Vallabhan, C P G
Abstract: Here we report measurements of third-order susceptibility χ(3), figure of merit F defined as χ(3)/α (where α is the absorption coefficient) and second hyperpolarizability 〈γ〉 of some metal substituted phthalocyanines and a naphthalocyanine in solutions of dimethyl formamide using degenerate four wave mixing at 532 nm under nanosecond excitation. It was found that among samples investigated, bis-naphthalocyanine possessed the highest value of 〈γ〉 followed by the bis-phthalocyanine. This observation is explained on the basis that bis-naphthalocyanine followed by bis-phthalocyanine has higher degree of π electron conjugation.
URI: http://dyuthi.cusat.ac.in/purl/2410
Date: 2002-06


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