【摘要】 为了研究一维固-液声子晶体,应用Bloch定理和边界条件解析推导出一维固-液声子晶体的表面消逝波传播模式存在条件的方程。在一定条件下,一维固-液声子晶体存在表面模式。对表面模式,声波位移场集中在半无限一维固-液声子晶体的表面,在背景材料和声子晶体内部声波衰减。在所有层中,一维固-液声子晶体的表面模式均具有消逝波性质的位移场。随后的数值研究证明了分析结果。更多还原

【Abstract】 In order to study one-dimensional solid-liquid phononic crystal,the dispersion equation which determines the existence condition of surface modes of one-dimensional solid-liquid phononic crystal was analytically deduced through the Bloch theory and boundary condition.Some surface modes can occur at the surface of a semi-infinite one-dimensional solid-liquid phononic crystal on special conditions.The surface modes for one-dimensional solid-liquid phononic crystal has evanescent displacement field within all layers.The numerical study verifies the analytical result.更多还原