| Experimental and Theoretical Evidence for the Existence of Broad Forbidden Gaps in the Three—Component Composite |
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| 引用本文： | 张舒,华佳,程建春.Experimental and Theoretical Evidence for the Existence of Broad Forbidden Gaps in the Three—Component Composite[J].中国物理快报,2003,20(8):1303-1305. |
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| 作者姓名： | 张舒 华佳 程建春 |
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| 作者单位： | StateKeyLaboratoryofModernAcoustics,NanjingUniversity,Nanfing210093 |
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| 摘 要： | The influence of localized resonance on the properties of band-gaps of the two-dimensional periodic composite are analysed numerically and experimentally by comparing the two-component phononic crystal with the three-component one. The three-component composite which exhibits localized resonance in the elastically soft coating ring is composed of a square array of coated cylinders embedded in an epoxy resin. The coated cylinders consist of a steel inner core and a rubber coating, which has much smaller wave velocity and mass density than the matrixand tile inner material. Tile measured transmission power of tile three-component composite drops to the noise level in a broad ultrasonic frequency interval in contrast to the binary composite, which is in good agreement with the calculation using the finite element method.
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| 关 键 词： | 光子带隙结构 三元化合物 光子晶体 弹性波 传播过程 局部谐振 光子禁带 有限元方法 |
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