Third-order optical nonlinearity of chlorin derivatives

Abstract

Second-order molecular hyperpolarizabilities (gamma) of four tetraphenylchlorin derivatives were measured by the Z-scan technique at 784 nm in the off-resonant region and the enhancement in the hyperpolarizabilities of these derivatives in comparison to the regular porphyrins with the same external side-groups is explained on the basis of the difference in their Q-band oscillator strengths. Copyright (C) 2001 , Ltd.