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Proceedings Paper

Quantification of the physical parameters of the stored hologram in photorefractive polymer composites
Author(s): John Dimitri Shakos; Mark D. Rahn; David P. West; Kaleemullah Khand
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Paper Abstract

The local field within a reorientational photorefractive polymer composite has been estimated to be 2.2 times the applied poling field. Using a transmission ellipsometric technique the birefringence within a pulsed photorefractive polymer material has been measured as a function of applied field. The birefringence at an internal poling field of 110 Vmicrometers -1 is 4 X 10-3. By equating the sum of the poling field and the space-charge field formed within a hologram to the birefringence dependency on field and the holographic contrast obtained in a four wave mixing experiment, the amplitude of the space-charge field has been found. Its values are between 7.8 and 15 Vmicrometers -1, depending on the ratio of reorientation and the Pockels contributions to the birefringence. In this regime the holographic contrast is limited by the trap density which is found to be between 7.4 X 1015 and 15.7 X 1015 cm-3.

Paper Details

Date Published: 18 May 1999
PDF: 9 pages
Proc. SPIE 3623, Organic Photonic Materials and Devices, (18 May 1999); doi: 10.1117/12.348396
Show Author Affiliations
John Dimitri Shakos, Univ. of Manchester (United Kingdom)
Mark D. Rahn, Univ. of Manchester (United Kingdom)
David P. West, Univ. of Manchester (United Kingdom)
Kaleemullah Khand, Univ. of Manchester (United Kingdom)

Published in SPIE Proceedings Vol. 3623:
Organic Photonic Materials and Devices
Bernard Kippelen, Editor(s)

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