Field enhancement and saturation of millimeter waves inside a metallic nanogap

Junshan Lin; Sang Hyun Oh; Hoai Minh Nguyen; Fernando Reitich

doi:10.1364/OE.22.014402

Field enhancement and saturation of millimeter waves inside a metallic nanogap

Junshan Lin, Sang Hyun Oh, Hoai Minh Nguyen, Fernando Reitich

Electrical and Computer Engineering

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13 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	14402-14410
Number of pages	9
Journal	Optics Express
Volume	22
Issue number	12
DOIs	https://doi.org/10.1364/OE.22.014402
State	Published - Jun 16 2014

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Field enhancement and saturation of millimeter waves inside a metallic nanogap

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