声子晶体中声子频率带隙与散射截面的关系

Relation between Phononic Crystal Frequency Band Gap and Scattering Cross Section in Phononic Crystal

用平面波方法,研究了Pb圆柱体在环氧树脂基体中按周期性排列构成的声子晶体中弹性波频率带结构,同时计算了弹性波在这种二维周期性复合介质中的散射截面,阐述了声子频率带隙与散射截面的关系.

Using the plane-waves method , the elastic wave frequency band structure of phononic crystal, which consists of Pb cylinders embeded in epoxy with periodic array, was investigated, and at the same time the scattering cross section of elastic waves in this two dimensional periodic composites was calculated. The relation between phononic crystal frequency band gap and scattering cross section was also studied, and the results agreed with those in other published works.