Analysis of wide-angle acousto-optic interaction geometry in single crystal mercury bromide

Abstract

The paper considers optic, acoustic and acousto-optic properties of single crystal mercury bromide Hg2Br2. Phase velocities of acoustic waves and frequency dependences of Bragg angles in the tetragonal crystal were calculated in (001) , (010) and (110) planes. The analysis was carried out in order to find a possibility of using the material in acousto-optic deflectors and imaging filters operating in the middle and long infrared region of spectrum. Figure of merit of the crystal was evaluated in two different interaction geometries in the strongly birefringent crystalline material.