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13 June 2002 Advances in organic photorefractive materials development
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Proceedings Volume 4642, Organic Photonic Materials and Devices IV; (2002)
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
We present results on the photorefractive performance of two different classes of organic materials. One of them is based on the space-charge field induced reorientation of the optical axis of chiral smectic A phases. In this case the orientational effect is linear in the field and it is due to the so-called electroclinic effect, in contrast with the quadratic effect present in nematics and associated with dielectric anisotropy. Besides presenting data on the photorefractive properties of these new mesophases, we will consider a simple model which describes their performance as a function of several material and geometrical parameters. In the second part of the paper we introduce cyclopalladated complexes as a new class of multifunctional photorefractive materials. Such molecules form amorphous phases which are photoconducting and exhibit a field dependent refractive index. Their efficiency is among the best known to date for organic materials and the simple synthetic route makes us foresee a fast optimization of cyclometallated compounds for photorefractive applications.
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Attilio Golemme, Iolinda Aiello, Davide Dattilo, Mauro Ghedini, Alain Bruno, and Roberto Termine "Advances in organic photorefractive materials development", Proc. SPIE 4642, Organic Photonic Materials and Devices IV, (13 June 2002);

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