Switching from nonlinear beam focusing to defocusing in periodic structures
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We demonstrate experimentally the transition of nonlinear beam focusing to defocusing by varying the modulation depth of a periodic system. The observed effect illustrates the fundamental crossover when the periodic system changes properties to homogeneous. © 2009 Optical Society of America.
author list (cited authors)
Bennet, F. H., Amuli, I. A., Neshev, D. N., Sukhorukov, A. A., Krolikowski, W. Z., Kivshar, Y. S., & IEEE, ..