周期性沟槽金属纳米狭缝中光的巨透射理论研究
A theoretical revisit of giant transmission of light through a metallic nano-slit surrounded with periodic grooves
摘要：
从理论上重新讨论了光通过输入表面上周期性凹槽包围的金属纳米狭缝的巨大传输。结果表明，对透射率的影响主要来自三个方面：沟槽产生的表面等离子体波、纳米狭缝产生的表面等离子体波和入射波。沟槽产生的表面等离子体波是决定纳米缝开口周围局部场分布的主要因素，它直接关系到通过纳米缝的透射率。纳米狭缝产生的SPW可以被认为是对输入表面上的光分布的扰动。当在输入表面上产生强表面等离子体波时，通过多周期的深槽可以极大地减小入射波的影响。我们的研究表明，通过周期性凹槽包围的纳米狭缝的最大传输的狭缝到凹槽的距离不能预测的几个以前的理论，包括磁场相位理论的最近的工作（物理评论Lett. 99，043902，2007）。一个明确的物理解释给出的依赖性的传输上的狭缝到槽的距离。
英文摘要：
The giant transmission of light through a metallic nano-slit surrounded by periodic grooves on the input surface is revisited theoretically. It is shown that the influence to the transmission comes from three parts: the groove-generated surface plasmon wave (SPW), the nano-slit-generated SPW and the incident wave. The groove-generated SPW is the main factor determining the local field distribution around the nano-slit opening, which is directly related to the transmission through the nano-slit. The nano-slit-generated SPW can be considered as a disturbance to the light distribution on the input surface. The influence of the incident wave can be strongly reduced when strong surface plasmon wave is generated on the input surface by many periods of deep grooves. Our study shows that the slit-to-groove distance for a maximal transmission through the nano-slit surrounded with periodic grooves can not be predicted by several previous theories, including the magnetic field phase theory of a recent work (Phys. Rev. Lett. 99, 043902, 2007). A clear physical explanation is given for the dependence of the transmission on the slit-to-groove distance.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
