Wood异常在二维亚波长孔阵列金属薄膜光学性质中的作用
Role of Wood anomalies in optical properties of thin metallic films with a bidimensional array of subwavelength holes
摘要：
最近的工作处理的光传输的亚波长孔阵列中的金属层沉积在介质基板上。为了使系统尽可能真实，我们进行了模拟，以启发实验数据。本文提出了一种调查的光学性质有关的传输这样的设备。数值模拟给出的理论结果与实验吻合良好，我们观察到，传输和反射行为对应于Fano的配置文件与共振响应的本征模式耦合非均匀衍射订单。因此，我们的结论是，观察到的传输特性可以解释为共振伍德的异常。
英文摘要：
Recents works deal with the optical transmission on arrays of subwavelength holes in a metallic layer deposited on a dielectric substrate. Making the system as realistic as possible, we perform simulations to enlighten the experimental data. This paper proposes an investigation of the optical properties related to the transmission of such devices. Numerical simulations give theoretical results in good agreement with experiment and we observe that the transmission and reflection behaviour correspond to Fano's profile correlated with resonant response of the eigen modes coupled with nonhomogeneous diffraction orders. We thus conclude that the transmission properties observed could conceivably be explained as resulting from resonant Wood's anomalies.
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