16 December 1993 Excited state dynamics of the third-order nonlinear optical response in diphenylhexatriene
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Abstract
Conjugated organic molecules and polymer systems are of interest due to the delocalized (pi) -electron systems which give rise to large values of (chi) (3)(-(omega) ;(omega) ,(omega) ,-(omega) ), with extremely fast response times, in wavelength regimes where there is minimal background absorption. We have previously presented theoretical results demonstrating that (chi) (3)(-(omega) ;(omega) ,(omega) ,-(omega) ) can be further increased for nonlinear optical processes originating from real population of electronic excited states in conjugated linear chains. In this paper, a dynamical model is developed for the time evolution of the degenerate four wave mixing susceptibility (gamma) (-(omega) ;(omega) ,(omega) ,-(omega) ).
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D. C. Rodenberger, Weidong Chen, Rui-Fang Shi, Qihou L. Zhou, Anthony F. Garito, "Excited state dynamics of the third-order nonlinear optical response in diphenylhexatriene", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); doi: 10.1117/12.165302; https://doi.org/10.1117/12.165302
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