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Proceedings Paper

Orientational manipulation of chromophores through photoisomerization
Author(s): Michel L. Dumont; Sophie Hosotte; G. Froc; Zouheir Sekkat
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Paper Abstract

Dye molecules are widely used as optical active dopants in polymer (or sol-gel) films designed for integrated optics. A large effort is made to control the orientation of dye molecules, in order to produce macroscopic anisotropy (permanent and reversible for optical memories or transient for polarization holography) or to pole the film for electro-optic applications or for harmonic generation. In this paper, optical methods for inducing orientational order in photoisomerizable molecules are discussed. Three mechanisms are analyzed, the Angular Hole Burning (AHB), the orientational redistribution and the orientational relaxation and the dynamics of their competition is studied. Experimental illustrations are given using azobenzene derivatives (like DR1) in PMMA or in sol-gels. These experiments provide an efficient method for the characterization of the angular mobility of molecules in different host materials and of the long term stability of anisotropy and of (Chi) (2) properties. Preliminary results of a general mathematical model are given: they look very promising for the understanding of orientation mechanisms in a broad variety of materials.

Paper Details

Date Published: 20 January 1994
PDF: 12 pages
Proc. SPIE 2042, Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects, (20 January 1994); doi: 10.1117/12.166297
Show Author Affiliations
Michel L. Dumont, Institut d'Optique Theorique et Appliquee (France)
Sophie Hosotte, Institut d'Optique Theorique et Appliquee (France)
G. Froc, Institut d'Optique Theorique et Appliquee (France)
Zouheir Sekkat, Institut d'Optique Theorique et Appliquee (France)


Published in SPIE Proceedings Vol. 2042:
Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects

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