固-流结构圆柱掺杂声子晶体的滤波特性

摘要

利用一维固-流结构圆柱掺杂声子晶体中弹性波横向受限的条件,推导出弹性波在一维固-流结构圆柱掺杂声子晶体中各个模式满足的关系式。研究了弹性波各模式的缺陷模随模式量子数和杂质厚度的变化规律。利用缺陷模随模式量子数的变化规律可以实现多通道滤波,利用缺陷模随杂质厚度的变化规律可以实现调谐滤波。%Applying the condition of elastic wave restricted in horizontal direction,the conditions that each mode should satisfy are concluded from the one-dimensional solid-fluid cylindrical doping phononic crystal.The dependences of defect modes on the mode quantum number and doping thickness are obtained for elastic wave.These results can be used to design multi-channel filter.