Abstract

We examine propagation and reflection of bulk optic and acoustic waves in media possessing strong anisotropy of physical properties. We also consider unusual wave phenomena taking place in artificial optic and acoustic “double negative” materials as well as in natural crystals demonstrating large birefringence and strong elastic anisotropy. It is shown that in the media, the Poynting vector and the wave vector may be separated by the extremely wide walkoff angles. In modern optic an acoustic crystals, the angles may correspondingly be as wide as 250 and 740, while in “metamaterials”, the two vectors are antiparallel. Using acousto-optic methods, we observed and examined a few unusual effects of the wave propagation and reflection in the crystals.

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