Abstract
The phthalocyanines are nonlinear optical (NLO) materials with great promise. The cubic hyperpolarizability, <γ>, at 1064 nm and/or 597 nm of over thirty of these materials has been measured. <γ> depends dramatically on the molecular structure.[1’2] In this paper the mechanisms contributing to the variations in the NLO properties of these substituted phthalocyanines are analyzed and a newer class of materials, the carotenoporphyrins, is investigated. Studies of the time and polarization dependence in degenerate four-wave mixing (DFWM) experiments show that optical pumping can contribute to enhanced nonlinearities and figures of merit in some of these materials.
© 1992 IQEC
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