Dirac cone dispersion of acoustic waves in plates without phononic crystals

被引：16
|
作者：
Maznev, A. A. [1 ]
机构：
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2014年 / 135卷 / 02期
关键词：
INDEX;
D O I：
10.1121/1.4861234
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Lamb waves in elastic plates exhibit Dirac-like cone dispersion at zero wavevector at the points of accidental degeneracy between longitudinal and transverse thickness resonances. The Lamb mode dispersion can be fine-tuned to yield a conical point by coating a plate with a layer of a different material and varying the thickness of the latter. Similarities and differences with respect to Dirac-like cone dispersion in phononic crystals and possible observable effects are discussed. (C) 2014 Acoustical Society of America.
引用
收藏
页码：577 / 580
页数：4
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