Two plasmonic mode excitation using a double-step rectangle grating
Two plasmonic mode excitation using a double-step rectangle grating
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DOI：
10.1364/josab.32.001804
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发表时间：
2015-09
影响因子：
1.9
通讯作者：
Y. Mishima;H. Habara;K. Tanaka
中科院分区：
文献类型：
--
作者：
Y. Mishima;H. Habara;K. Tanaka
研究了具有双阶梯矩形轮廓的光栅上等离子体激元模式的激发。单级光栅会激发等离子体模的一侧，而双级光栅会同时产生奇偶等离激元模式。通过选择规则密度和阶梯深度，可以单独控制双阶梯光栅的模式波长。此外，双阶光栅上的场强分布比单阶光栅上的场强分布更宽、更强。
Excitation of plasmonic modes is investigated on a grating having a double-step rectangle profile. A single-step grating excites one side of a plasmonic mode, whereas the double-step profile can induce odd and even plasmonic modes simultaneously. The mode wavelength of the double-step grating can be individually controlled by selecting the rule density and the depths of the steps. In addition, the field intensity on the double-step grating has wider and stronger distributions than that appearing on the single-step grating.