Theoretical and experimental studies of third-order nonlinear optical susceptibilities of new p-N,N'-dimethylaniline tetrathiafulvalene derivatives

Bouchta Sahraoui; Malgorzata Makowska-Janusik; Ivan V. Kityk; Xuan Nguyen Phu; M. Salle; A. Gorgues

doi:10.1117/12.386780

24 May 2000 Theoretical and experimental studies of third-order nonlinear optical susceptibilities of new p-N,N'-dimethylaniline tetrathiafulvalene derivatives

Bouchta Sahraoui, Malgorzata Makowska-Janusik, Ivan V. Kityk, Xuan Nguyen Phu, M. Salle, A. Gorgues

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Proceedings Volume 4089, Optics in Computing 2000; (2000) https://doi.org/10.1117/12.386780
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada

Abstract

We report large third-order nonlinear optical susceptibilities (chi) ^<3>_ijkl of new tetrathiafulvalene (TTF) derivatives, using the degenerate four wave mixing (DFWM) method. To know the physical origin of their optical nonlinearities, we separate electronic and ionic contributions to nonlinear optical susceptibilities. The electronic contribution to the third-order nonlinear optical susceptibilities of the studied molecules is dominant. From DFWM measurements we also deduce values of the third-order hyperpolarizabilities (chi) which are about 10⁵ greater than the (chi) value for CS₂. We have thus shown that the molecules under consideration posses larger third order nonlinear optical susceptibilities compared to the polyazine derivatives, acetylenic analogues of TTF and to the ethylenic TTF derivatives. All theoretical simulations are done within a framework of semi-empirical quantum chemical calculation. A correlation between molecular dipole moments and third order susceptibilities is found.

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Bouchta Sahraoui, Malgorzata Makowska-Janusik, Ivan V. Kityk, Xuan Nguyen Phu, M. Salle, and A. Gorgues "Theoretical and experimental studies of third-order nonlinear optical susceptibilities of new p-N,N'-dimethylaniline tetrathiafulvalene derivatives", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); https://doi.org/10.1117/12.386780

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KEYWORDS

Molecules

Nonlinear optics

Electrons

Optical testing

Absorption

Data modeling

Four wave mixing

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