Adjustable phase resonances in a compound metallic grating with perpendicular cuts.
Adjustable phase resonances in a compound metallic grating with perpendicular cuts.
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DOI：
10.1364/oe.18.006871
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发表时间：
2010-03
期刊：
影响因子：
3.8
通讯作者：
Xiang Zhai;Jian-Qiang Liu;M. He;Lingling Wang;S. Wen;D. Fan
中科院分区：
文献类型：
--
作者：
Xiang Zhai;Jian-Qiang Liu;M. He;Lingling Wang;S. Wen;D. Fan
提出了一种每条狭缝都有垂直切口的复合金属光栅，并对其光传输特性进行了理论研究。当切口不对称地设置在狭缝中时，奇偶波导模式表现出不同的行为。特别地，通过改变狭缝中切口的位置，可以交替地实现该复合周期结构的透射谱的透射下降。本文还确定了切割尺寸对所提出的金属光栅相位共振的影响，并通过模拟场和相位图讨论了潜在的物理特性。
We propose a compound metallic grating with perpendicular cuts in each slit and investigate its optical transmission property theoretically. The odd and even waveguide modes exhibit different behaviors when the cuts are set asymmetrically in the slits. Particularly, it is shown that the transmission dips of transmission spectrum for this compound periodic structure can be realized alternately by shifting the position of cuts in the slit. The effect of cut size on the phase resonances in the proposed metallic grating is also identified, and the underlying physics is discussed by the simulated field and phase maps.