声子晶体中弹性波带隙与散射

功能材料, 2005, 36(2): 244-249.

1.湖南大学,应用物理系,湖南,长沙,410082;湘南学院,物理系,湖南,郴州,423000

2.湖南大学,应用物理系,湖南,长沙,410082

3.湖南大学,应用物理系,湖南,长沙,410082

4.湖南大学,应用物理系,湖南,长沙,410082

基金项目: 高等学校博士学科点专项科研项目(20030532008)

Elastic wave band gap and scattering in phononic crystal

声子带隙产生条件是声子晶体研究的一个重要问题,首先对钢圆柱体嵌入空气基质组成的声子晶体散射截面进行计算,然后用平面波方法计算了弹性波带结构.结果表明声子带隙将出现在两个完全分离的共振态之间.因此,声子晶体产生完全带隙的条件是弹性波在基质材料中的传播被禁止并远离共振.

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