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Photorefractivity And Photoisomerization In Azo-Dye-Doped Polymers

Published online by Cambridge University Press:  16 February 2011

B. Kippelen ,
Sandalphon ,
K. Meerholz ,
B. Volodin ,
S. R. Lyon ,
A. B. Padias ,
H. K. Hall Jr  and
N. Peyghambarian
B. Kippelen
Affiliation:
Optical Sciences Center, University of Arizona, Tucson, AZ 85721
Sandalphon
Affiliation:
I.P.C.M.S. Groupe d'Optique Nonlinéaire et d'Optoélectronique - 5, rue de l'Université 67084 Strasbourg Cedex, France
K. Meerholz
Affiliation:
Optical Sciences Center, University of Arizona, Tucson, AZ 85721
B. Volodin
Affiliation:
Optical Sciences Center, University of Arizona, Tucson, AZ 85721
S. R. Lyon
Affiliation:
Chemistry Department, University of Arizona, Tucson, AZ 85721
A. B. Padias
Affiliation:
Chemistry Department, University of Arizona, Tucson, AZ 85721
H. K. Hall Jr
Affiliation:
Chemistry Department, University of Arizona, Tucson, AZ 85721
N. Peyghambarian
Affiliation:
Optical Sciences Center, University of Arizona, Tucson, AZ 85721
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Abstract

The photorefractive properties of photoconducting polymers doped with nonlinear azo dyes are investigated by means of polarization and field-dependent four-wave Mixing experiments. The nonlocal response of the photorefractive effect is shown by two-beam coupling experiments. High diffraction efficiencies (> 5%) and net coupling gain (6 cm-l) are demonstrated at low power with a semiconductor laser diode in 105 μm films. Under some conditions, gratings due to photoisomerization of the azo dye molecules are also present and their properties are discussed.

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References

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