Field enhancement and saturation of milimeter waves inside a metallic nanogap

This paper investigates the millimeter electromagnetic waves passing through a metal nanogap. Based upon the study of a perfect electrical conductor model, we show that the electric field enhancement inside the gap saturates as the gap size approaches zero, and the ultimate enhancement strength is inversely proportional to the thickness of the metal film. In addition, no significant enhancement can be gained by decreasing the gap size further if the aspect ratio between the dimensions of the underlying geometric structure exceeds approximately 100.


Published in:
Optics Express, 22, 12, 14402-14410
Year:
2014
Laboratories:




 Record created 2016-01-13, last modified 2018-04-18

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