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Proceedings Paper

Strong Field Nonlinear Optical Properties Of Polydiacetylenes
Author(s): F. Charra; J. M. Nunzi
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Paper Abstract

The polydiacetylenes are known for their large and fast third order optical nonlinearities, mainly due to the one dimensional delocalization of their π-electron system. Since they are available in several easily processable forms (Solutions,gels...) they can be considered as prototype materials for nonlinear optics. These nonlinearities are usually characterized by a third order nonlinear susceptibility (x(3)) but higher order effects take place when the pump intensity is increased. These higher order effects are usually observed under one photon resonant conditions, where they correspond to a saturation of the optical nonlinearity with pump intensity. Here we report on investigations of high order nonlinearities with a pump wavelength in the transparancy domain of the polydiacetylenes. Under our experimental conditions the nonlinear responses are dominated by higher order effects for pump intensities of the order of 1 GW/cm and, on the contrary to the one photon resonant situation, they correspond to an increase of the optical nonlinearity.

Paper Details

Date Published: 22 December 1989
PDF: 9 pages
Proc. SPIE 1127, Nonlinear Optical Materials II, (22 December 1989); doi: 10.1117/12.961417
Show Author Affiliations
F. Charra, Laboratoire de Physique Electonique des Materiaux (France)
J. M. Nunzi, Laboratoire de Physique Electonique des Materiaux (France)

Published in SPIE Proceedings Vol. 1127:
Nonlinear Optical Materials II
Jean-Bernard Grun, Editor(s)

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