Surface acoustic waves in two-dimensional periodic elastic structures

被引：290

作者：

Tanaka, Y ^{[1
]}

Tamura, S ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 060, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.58.7958

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Acoustic waves localized at the surface of two-dimensional (2D) periodic elastic structures, or 2D phononic crystals, are studied theoretically by taking account of the elastic anisotropy of constituent materials. The surface considered is perpendicular to the axis of aperiodic array of cylinders embedded in a background material. The dispersion relations of the surface modes are calculated for circular cylinders of AlAs which form a square lattice in a GaAs matrix. The folding and anisotropy of the surface wave branches, as well as the existence of pseudusurface waves, are found. The stop band distributions of the surface, pseudosurface, and bull; waves are plotted in a form relevant for comparison with ultrasound imaging experiments. [S0163-1829(98)00336-1].

引用

页码：7958 / 7965

页数：8

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