CUED Publications database

Effect of plasticization on the performance of a photorefractive polymer

Bolink, HJ and Krasnikov, VV and Malliaras, GG and Hadziioannou, G (1996) Effect of plasticization on the performance of a photorefractive polymer. Journal of Physical Chemistry, 100. pp. 16356-16360. ISSN 0022-3654

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Abstract

A systematic study of the effect of plasticization on the photorefractive performance of a poly(N-vinylcarbazole) (PVK) based polymer composite is presented. It is shown that N-ethylcarbazole (ECZ) can be used as an efficient plasticizer, leading to a large increase of the gain coefficient and the diffraction efficiency, which arises solely due to an improvement in the orientational mobility of the dispersed nonlinear optical molecules. Phase separation, which is observed at samples with a high ECZ concentration, sets the upper limit. The steady state and the kinetics of the photorefractive gratings in the plasticized samples are discussed. The measurements suggest a high value of the saturation field and a response time that is limited by photogeneration. A configuration is described, where prisms are employed to couple light into and from the sample, resulting into a higher two-beam coupling gain and diffraction efficiency. © 1996 American Chemical Society.

Item Type: Article
Subjects: UNSPECIFIED
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Depositing User: Cron Job
Date Deposited: 10 Sep 2017 20:11
Last Modified: 14 Sep 2017 01:26
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