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Proceedings Paper

LiNbO3 nanoparticles as sensitizer in photorefractive polymer composites
Author(s): Ewa A. Sliwinska; Ulrich Hartwig; Karsten Buse; Klaus Meerholz
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Paper Abstract

Novel photorefractive (PR) hybrid composites have been developed, based on a functional polymer poly(N-vinylcarbazole) (PVK) sensitized with nanocrystalline lithium niobate (LiNbO3). A comparison study between traditional organic PR material sensitized with 2,4,7-trinitro-9-fluorenone (TNF) and novel composites mentioned above was made with respect to their photorefractive behavior at 633 nm. The steady-state and the kinetics of the photorefractive gratings in the materials under study were investigated in degenerate four-wave mixing (DFWM) and two-beam-coupling (TBC) experiments in a tilted geometry. It was shown that photorefractive properties of new composites are strongly influenced by the concentration of nanocrystals. The effect of co-sensitization, by the traditional 2,4,7-trinitrofluorenone and the LiNbO3 nano-crystals, was discovered. This yields materials with improved PR performance compared to that of the standard PR polymer material sensitized by TNF only.

Paper Details

Date Published: 26 October 2004
PDF: 7 pages
Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); doi: 10.1117/12.563692
Show Author Affiliations
Ewa A. Sliwinska, Univ. Koln (Germany)
Ulrich Hartwig, Univ. Bonn (Germany)
Karsten Buse, Univ. Bonn (Germany)
Klaus Meerholz, Univ. Koln (Germany)

Published in SPIE Proceedings Vol. 5521:
Organic Holographic Materials and Applications II
Klaus Meerholz, Editor(s)

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