Surface corrugated laminates as elastic grating couplers: Splitting of SV- and P-waves by selective diffraction

G. Chaplain, R. Craster
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引用次数: 1

Abstract

The phenomenon of selective diffraction is extended to in-plane elastic waves and we design surface corrugated periodic laminates that incorporate crystal momentum transfer which, due to the rich physics embedded within the vector elastic system, results in frequency, angle and wave-type selective diffraction. The resulting devices are elastic grating couplers, with additional capabilities as compared to analogous scalar electromagnetic couplers, in that the elastic couplers possess the ability to split and independently redirect, through selective negative refraction, the two body waves present in the vector elastic system: compressional (P) and shear-vertical (SV) elastic waves. The design paradigm, and interpretation, is aided by obtaining isofrequency contours via a non-dimensionalised transfer matrix method.
作为弹性光栅耦合器的表面波纹层压板:通过选择性衍射分离SV波和p波
选择性衍射现象扩展到平面内弹性波,我们设计了包含晶体动量传递的表面波纹周期性层叠板,由于矢量弹性系统中嵌入了丰富的物理,导致频率,角度和波型选择性衍射。由此产生的装置是弹性光栅耦合器,与类似的标量电磁耦合器相比,具有额外的功能,因为弹性耦合器具有通过选择性负折射分裂和独立重定向矢量弹性系统中存在的两个体波的能力:压缩(P)和剪切垂直(SV)弹性波。设计范例和解释是通过无量纲化传递矩阵方法获得等频轮廓来辅助的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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