声子晶体的弹性系数

Elastic Coefficient of Phononic Crystal

研究发现,较高的声速比,有利于带隙的产生.对声子晶体中的弹性波传播,高密度的圆柱体嵌入低密度的基质材料,比较容易产生完全带隙;相反,对声子晶体中的声波传播,则低密介质嵌入高密基质中,容易产生完全带隙.另外,弹性系数也将对声子晶体带隙产生重要影响.

We make a study of elastic coefficient of phononic crystal. The higher velocity ratio between the two components of the composite, the more favorable the condition for gaps. Similarly, the density contrast is very important. However, for elastic waves, high-density scatters favor gaps, while for acoustic waves, low-density inclusions in a high-density matrix is the preferable setup. However, phononic crystal gaps are directly affected elastic coefficient.