Abstract

It is shown theoretically, that the phenomenon of radiation focusing in a small region of the near zone inside a dielectric film can present due to electromagnetic wave transmission through sub-wavelength nanoapertures. The confirmation is based on the rigorous theory of plane wave diffraction by a slot in a perfectly conducting screen of finite thickness in the presence of a plane dielectric film on a substrate, which plays the role of a radiation detector.

中文翻译：

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通过亚波长纳米孔径传输的电磁辐射的衍射聚焦

摘要

从理论上可以看出，由于电磁波通过亚波长纳米孔的传播，可能会出现辐射集中在电介质膜内部的小区域的现象。该确认基于严格的平面波衍射理论，即在基板上存在平面介电膜的情况下，通过在厚度有限的完美导电屏中的狭缝中的狭缝进行平面波衍射，该辐射起着探测器的作用。