Evidence of Fano-like interference phenomena in locally resonant materials -: art. no. 225502
Evidence of Fano-like interference phenomena in locally resonant materials -: art. no. 225502
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DOI：
10.1103/physrevlett.88.225502
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发表时间：
2002-06-03
影响因子：
8.6
通讯作者：
Djafari-Rouhani, B
中科院分区：
文献类型：
--
作者：
Goffaux, C;Sánchez-Dehesa, J;Djafari-Rouhani, B
声子晶体是由呈现局域共振的三维单元阵列组成的，最近被发现。在这里，它表明了他们的二维对应的行为类似的方式。特别是，观察到透过率光谱表现出非常不对称的峰，这被解释为类Fano干涉现象。采用时域有限差分方法对结构单元质量密度与共振线形状的关系进行了全面的研究。此外，还引入了一个简单的分析模型，直观地解释了干扰现象的起源。
Sonic crystals consisting of three-dimensional arrays of units which exhibit localized resonances have been discovered recently. Here, it is shown that their two-dimensional counterparts behave in a similar manner. Particularly, it is observed that the transmittance spectra show very asymmetric peaks which are explained as a Fano-like interference phenomenon. A finite difference time domain method is employed to perform a comprehensive study of the resonance line shape as a function of the mass density of the structural units. Also, a simple analytical model is introduced to give an intuitive account of the origin of the interference phenomenon.