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Acoustic anisotropy of acoustooptic Tl3AsS4 crystals

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Abstract

We present comprehensive experimental measurements and analysis of anisotropy of the acoustic wave velocities for Tl3AsS4 crystals, including the obliquity and nonorthogonality of the acoustic waves, and the deviations from purely longitudinal and transverse polarization types. We have found that the crystals under analysis are characterized by rather low transverse wave velocities v23 and v32, which are both equal to 630 m/s. It is shown that the efficiency of acoustooptic (AO) interactions in Tl3AsS4 can be notably increased when providing anisotropic interaction with the slowest transverse acoustic wave. Under the previously mentioned conditions, the AO figure-of-merit can be estimated to be extremely high, i.e., approximately 3×1012s3/kg.

© 2015 Optical Society of America

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