孔阵透射谱中红移和红尾的Fano型解释
Fano-type interpretation of red shifts and red tails in hole array transmission spectra
摘要：
我们提出了一个统一的观点，它允许了解最近的实验中报道的光谱特征与二维阵列的亚波长孔在金属薄膜。我们开发了一个Fano分析相关的散射问题，区分两个干扰的传输过程中，即非共振贡献（直接散射）和共振贡献（表面等离子体激元激发）的贡献。这两个贡献之间的耦合强度的引入自然会引起共振位移和满足简单标度关系的配置文件的不对称性。我们还报告了一个实验来证实这一分析。
英文摘要：
We present a unifying point of view which allows to understand spectral features reported in recent experiments with two-dimensional arrays of subwavelength holes in metal films. We develop a Fano analysis of the related scattering problem by distinguishing two interfering contributions to the transmission process, namely a non-resonant contribution (direct scattering) and a resonant contribution (surface plasmon excitation). The introduction of a coupling strength between these two contributions naturally induces resonance shifts and asymmetry of profiles which satisfy simple scaling relations. We also report an experiment to confirm this analysis.
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