机构地区: 国防科学技术大学光电科学与工程学院光子晶体研究中心
出 处: 《材料科学与工程学报》 2004年第1期68-70,共3页
摘 要: 本文以不锈钢管正方形排列在空气中形成的二维声子晶体为对象 ,使用平面波展开法计算并通过实验测试的方法 ,分析了该二维声子晶体的声波禁带 ,讨论了晶格常数对声波禁带的影响。结果表明 ,随着晶格常数的减小 ,ΓX方向禁带宽度增加 ,禁带上下边界频率增大。 Band gaps of 2D phononic crystal, composed of square arrays of periodic hollow stainless steel cylinders in the air, are analyzed both theoretically and experimentally. The effects of lattice constant on band gaps are also discussed. It is concluded that while the lattice constant is decreased, the width and the limit frequency of the band gap of ΓX-direction increased.