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Acousto-optic investigation of propagation and reflection of acoustic waves in paratellurite crystal

机译：声波在星云晶体中传播和反射的声光研究

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The paper presents results on acousto-optic investigation of unusual acoustic phenomena taking place in crystals possessing strong anisotropy of elastic properties. Advantages of the applied method of analysis are demonstrated by the example of the commonly used acousto-optic material tellurium dioxide. The major goal of the research consists of experimental verification of theoretical conclusions related to peculiar cases of acoustic propagation and reflection recently observed in the crystalline material. In particular, the case of glancing incidence and the following reflection of elastic energy from a free boundary separating the paratellurite crystal and the vacuum is examined in the paper. It is shown in the acousto-optic experiment that, in the case of glancing incidence, energy flow of a reflected acoustic wave may propagate practically in a reverse direction with respect to an incident wave. It is also proved that strong elastic anisotropy of the crystal is responsible for the unusual propagation and reflection of the acoustic waves. The research confirms the conclusion that the examined acoustic effects may be useful in development of new acousto-optic devices.
机译：本文介绍了在具有强烈弹性特性各向异性的晶体中发生的异常声音现象的声光研究结果。以常用的声光材料二氧化碲为例说明了应用分析方法的优势。该研究的主要目的是对与晶体材料中最近观察到的特殊情况下的声传播和反射有关的理论结论进行实验验证。特别是，在本文中研究了掠射入射的情况以及随后弹性能量从分离星云石晶体和真空的自由边界反射的情况。在声光实验中表明，在掠过入射的情况下，反射的声波的能量流实际上可能相对于入射波沿相反的方向传播。还证明了晶体的强弹性各向异性是声波异常传播和反射的原因。该研究证实了以下结论：所研究的声学效果可能对开发新型声光装置有用。

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