A study was made of third-order nonlinear optical susceptibilities of new tetrathiafulvalene (TTF) derivatives, using the degenerate four wave mixing (DFWM) method, as well as complex quantum chemical calculations. To understand the physical nature of the optical nonlinearities, we separated their electronic and nuclear contributions. We found that the electronic contribution to these nonlinearities predominated. Our investigations suggest that TTF may be a highly promising material for nonlinear optics (NLO).
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Sahraoui, B., Pluciński, K.J., Makowaska-Janusik, M. et al. Theoretical and Experimental Studies of Third-Order Nonlinear Optical Susceptibilities of New p-N,N′-Diamethylaniline Tetrathiafulvalene Derivatives. MRS Online Proceedings Library 660, 825 (2000). https://doi.org/10.1557/PROC-660-JJ8.25