Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings.
Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings.
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通过二维金属光栅的 Fano 型传输的偏振加权。
DOI：
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发表时间：
2010
影响因子：
1.9
通讯作者：
Y. Fainman
中科院分区：
文献类型：
--
作者：
K. Tetz;V. Lomakin;M. Nezhad;L. Pang;Y. Fainman
我们展示了一种通过偏振旋转来隔离周期性光栅中表面等离子体激元介导的共振传输效应的方法。该光栅由光学厚金属膜上的圆柱孔方形阵列组成。分别用法诺型和纯洛伦兹型线形准确地描述了同偏振和交叉偏振情况的透射率数据。这种偏振控制允许改变谐振和非谐振传输机制的相对权重，从而控制观察到的法诺型线形状的形状和对称性。
We demonstrate an approach allowing isolating effects of surface plasmon polariton mediated resonant transmission in a periodic grating by means of polarization rotation. The grating comprises a square array of cylindrical holes in an optically thick metallic film. Transmittance data for the co- and cross-polarized cases are described accurately with Fano-type and pure Lorentzian-type line shapes, respectively. This polarization control allows for changing the relative weights of resonant and non-resonant transmission mechanisms, thus controlling the shape and symmetry of the observed Fano-type line shapes.