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首页> 外文期刊>Crystallography reports >Conversion acoustic resonances in orthorhombic crystals
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Conversion acoustic resonances in orthorhombic crystals

机译：正交晶体中的转换声共振

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摘要

A classification of acoustic-beam reflection resonances in orthorhombic crystals under conditions where a proximity to conversion is implemented in the vicinity of total internal reflection is proposed. In this case, the energy from the incident pump beam falls almost entirely into a narrow intense reflected beam propagating at a small angle with respect to the surface. The crystal boundary is parallel to one of the elastic symmetry planes, and the excited beam propagates near one of axes 2 in this plane. Depending on the relations between the elastic moduli and the chosen propagation geometry, 18 types of resonances may occur, but no more than three in each crystal. The developed theory combines an approximate analytical description and accurate computer analysis. The relations between the elastic moduli providing minimum energy loss over the parasite reflected wave are determined. Some crystals with resonant excitation very close to conversion are revealed.
机译：提出了在全内反射附近实现转换接近的条件下，正交晶体中声束反射共振的分类。在这种情况下，来自入射泵浦光束的能量几乎全部落入相对于表面以小角度传播的狭窄的强反射光束中。晶体边界与弹性对称平面之一平行，并且激发光束在该平面中的轴2之一附近传播。根据弹性模量与所选传播几何形状之间的关系，可能会发生18种共振，但每个晶体中的共振不超过三种。发达的理论结合了近似的分析描述和准确的计算机分析。确定在寄生反射波上提供最小能量损失的弹性模量之间的关系。揭示了一些共振激发非常接近转化的晶体。

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