Space-charge waves in photorefractive BSO crystals

Preben Buchhave; Sergei F. Lyuksyutov; Mikhail V. Vasnetsov

doi:10.1117/12.323704

23 September 1998 Space-charge waves in photorefractive BSO crystals

Preben Buchhave, Sergei F. Lyuksyutov, Mikhail V. Vasnetsov

Proceedings Volume 3488, Nonlinear Optics of Liquid and Photorefractive Crystals II; (1998) https://doi.org/10.1117/12.323704
Event: International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 1997, Partenit, Crimea, Ukraine

Abstract

Recent measurements revealing new aspects of the nature and physics of space-charge waves in photorefractive Bi₁₂SiO₂₀ crystals are presented. A Bessel-function family of space-charge wave resonances are shown to exist for excitation by a frequency modulated running interference pattern. It is also demonstrated that space-charge waves may continue into regions of the crystal not subjected to the driving light field. Subharmonic space-charge gratings are shown to have an internal structure that for running waves moves with a group velocity opposite the driving optical interference pattern, which is moving with the phase velocity of the space-charge field and the associated refractive-index grating. We also describe how the subharmonics evolve dynamically from a speckle-like pattern towards a regular wave structure. Finally, self-excitation of spontaneous scattered beams ins described, and it is demonstrated that space-charge waves with a long decay time and a high Q-factor are associated with this phenomenon.

Citation Download Citation

Preben Buchhave, Sergei F. Lyuksyutov, and Mikhail V. Vasnetsov "Space-charge waves in photorefractive BSO crystals", Proc. SPIE 3488, Nonlinear Optics of Liquid and Photorefractive Crystals II, (23 September 1998); https://doi.org/10.1117/12.323704

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