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Proceedings Paper

Theoretical and experimental studies of third-order nonlinear optical susceptibilities of new p-N,N'-dimethylaniline tetrathiafulvalene derivatives
Author(s): Bouchta Sahraoui; Malgorzata Makowska-Janusik; Ivan V. Kityk; Xuan Nguyen Phu; M. Salle; A. Gorgues
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Paper 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.

Paper Details

Date Published: 24 May 2000
PDF: 6 pages
Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); doi: 10.1117/12.386780
Show Author Affiliations
Bouchta Sahraoui, Univ. d'Angers (France)
Malgorzata Makowska-Janusik, Institute of Physics (Poland)
Ivan V. Kityk, Univ. d'Angers and Institute of Physics (Poland)
Xuan Nguyen Phu, Univ. d'Angers (France)
M. Salle, Univ. d'Angers (France)
A. Gorgues, Univ. d'Angers (France)

Published in SPIE Proceedings Vol. 4089:
Optics in Computing 2000
Roger A. Lessard; Tigran V. Galstian, Editor(s)

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