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Proceedings Paper

Visualization of refractive index modulation by optical channeling
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Paper Abstract

We discuss manifestation of the channeling effect in the visualization of hexagonal patterns in KNbO3 and phase gratings in LiNbO3. We have shown that visualization of the domain patterns, discovered earlier in the subharmonic beam in the photorefractive BSO crystal, may be explained by the channeling effect. A wave-packet description allows us to explain backward movement of domains due to the specific dispersion law for the space-charge waves. An analogy is discussed with domain formation in the charge-density-waves, known in quasi-1D conductors. Non-linear phase shift of the couple's waves may lead to discomensuration.

Paper Details

Date Published: 28 June 1999
PDF: 9 pages
Proc. SPIE 3793, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials, (28 June 1999); doi: 10.1117/12.351409
Show Author Affiliations
Nickolai V. Kukhtarev, Alabama A&M Univ. (United States)
Tatiana V. Kukhtareva, Alabama A&M Univ. (United States)
JaChing Wang, Alabama A&M Univ. (United States)
Vernessa M. Edwards, Alabama A&M Univ. (United States)
Partha P. Banerjee, Univ. of Alabama in Huntsville (United States)
Preben Buchhave, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 3793:
Operational Characteristics and Crystal Growth of Nonlinear Optical Materials
Ravindra B. Lal; Donald O. Frazier, Editor(s)

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