LiNbO<sub>3</sub> nanoparticles as sensitizer in photorefractive polymer composites

Ewa A. Sliwinska; Ulrich Hartwig; Karsten Buse; Klaus Meerholz

doi:10.1117/12.563692

26 October 2004 LiNbO₃ nanoparticles as sensitizer in photorefractive polymer composites

Ewa A. Sliwinska, Ulrich Hartwig, Karsten Buse, Klaus Meerholz

Proceedings Volume 5521, Organic Holographic Materials and Applications II; (2004) https://doi.org/10.1117/12.563692
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Ewa A. Sliwinska, Ulrich Hartwig, Karsten Buse, and Klaus Meerholz "LiNbO₃ nanoparticles as sensitizer in photorefractive polymer composites", Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); https://doi.org/10.1117/12.563692

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