Light-induced second-harmonic generation in azo-dye polymers
- 15 June 1993
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 18 (12) , 941-943
- https://doi.org/10.1364/ol.18.000941
Abstract
The permanent all-optical poling of an azo-aromatic acrylic copolymer is experimentally demonstrated by seeding preparation in a backward phase-conjugation geometry. The microscopic mechanism involves an orientational hole burning followed by orientational redistribution caused by trans-to-cis isomerization of the azo-dye chromophores. The characteristic kinetics of growth and decay of the noncentrosymmetry grating is monitored by second-harmonic generation.Keywords
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