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Enhanced transmission due to nonplasmon resonances in one- and two-dimensional gratings

机译：由于一维和二维光栅中的非等离子体共振，从而提高了透射率

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摘要

Enhanced transmission through subwavelength slit gratings and hole arrays is studied in view of its application in the far-infrared and microwave domains. Because for perfectly conducting gratings, plasmon resonances are not expected to produce an enhanced transmission, other kinds of resonance, such as Fabry-Perot, waveguide-mode, and cavity-mode resonances, are studied. The possibility of reaching 100% transmittivity for some particular wavelengths is established when two superimposed identical gratings are used while each of them transmits approximately 1% off resonance. A similar transmission is obtained with hole arrays. The study of the field map inside the groove region allows our establishing the nature of the resonance, that is involved. Comparison of the bandwidth with respect to the wavelength or incidence given by various kinds of resonance is presented.
机译：考虑到其在远红外和微波领域的应用，研究了通过亚波长狭缝光栅和孔阵列的增强传输。因为对于完美传导的光栅，预计等离子体激元共振不会产生增强的透射，所以需要研究其他种类的共振，例如法布里-珀罗共振，波导模共振和腔模共振。当使用两个叠加的相同光栅，而每个光栅透射共振的频率大约为1％时，就可以确定某些特定波长达到100％透射率的可能性。使用孔阵列可以获得类似的透射率。对凹槽区域内部场图的研究使我们能够确定所涉及的共振的性质。提出了关于各种谐振给出的关于波长或入射的带宽的比较。

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