Abstract
The conditions of the formation of a spatially ordered optical structure on the base of media with space–time modulation of refractive index by ultrasound have been considered. It has been shown that the excitation of a standing ultrasonic wave in the medium creates a structure consisting of trajectories of separate light beams, which is a superlattice of the dynamic 2D-photonic crystal. The band gaps corresponding to negative light refraction have been revealed in beam trajectories. Possible fields of application of such structures have been discussed.
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