Optical properties

Negative light refraction in a gradient medium with ultrasound-modulated refractive index

E. K. Naimi, Yu. Kh. Vekilov

National University of Science and Technology «MISIS», Moscow

Abstract: The conditions of the formation of a spatially ordered optical structure with an ultrasound-modulated refractive index in a gradient medium 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 $4D$ photonic crystal". Regions corresponding to negative light refraction have been revealed in beam trajectories. Possible fields of application of such structures have been discussed.

Received: 14.07.2014

 English version: Physics of the Solid State, 2015, 57:1, 111–114

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