Theoretical study of terahertz near-field enhancement assisted by shape resonance in rectangular hole arrays in metal films

D. J. Park; S. B. Choi; Y. H. Ahn; Q. H. Park; D. S. Kim

doi:10.3938/jkps.54.64

Theoretical study of terahertz near-field enhancement assisted by shape resonance in rectangular hole arrays in metal films

D. J. Park, S. B. Choi, Y. H. Ahn, Q. H. Park, D. S. Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

We report a theoretical investigation on terahertz near-field enhancement in a rectangular hole array on a metal film driven by a shape resonance. The analytic model is constructed by boundary matching the Rayleigh wave expansion and the modal expansion of electromagnetic waves. Simulation results reveal that the enhancement factor depends on the inverse coverage, reaching more than 1000 in a sub-micron wide rectangular hole. We also show that the resonance frequency is predominantly determined by the length of the rectangles while variations in the width and the thickness cause minor shifts in the resonant frequency.

Original language	English
Pages (from-to)	64-70
Number of pages	7
Journal	Journal of the Korean Physical Society
Volume	54
Issue number	1
DOIs	https://doi.org/10.3938/jkps.54.64
Publication status	Published - 2009 Jan

Keywords

Diffraction theory
Field enhancement
Near-field
Rectangular hole
Terahertz

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.3938/jkps.54.64

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abstract = "We report a theoretical investigation on terahertz near-field enhancement in a rectangular hole array on a metal film driven by a shape resonance. The analytic model is constructed by boundary matching the Rayleigh wave expansion and the modal expansion of electromagnetic waves. Simulation results reveal that the enhancement factor depends on the inverse coverage, reaching more than 1000 in a sub-micron wide rectangular hole. We also show that the resonance frequency is predominantly determined by the length of the rectangles while variations in the width and the thickness cause minor shifts in the resonant frequency.",

keywords = "Diffraction theory, Field enhancement, Near-field, Rectangular hole, Terahertz",

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AU - Choi, S. B.

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AU - Park, Q. H.

AU - Kim, D. S.

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N2 - We report a theoretical investigation on terahertz near-field enhancement in a rectangular hole array on a metal film driven by a shape resonance. The analytic model is constructed by boundary matching the Rayleigh wave expansion and the modal expansion of electromagnetic waves. Simulation results reveal that the enhancement factor depends on the inverse coverage, reaching more than 1000 in a sub-micron wide rectangular hole. We also show that the resonance frequency is predominantly determined by the length of the rectangles while variations in the width and the thickness cause minor shifts in the resonant frequency.

AB - We report a theoretical investigation on terahertz near-field enhancement in a rectangular hole array on a metal film driven by a shape resonance. The analytic model is constructed by boundary matching the Rayleigh wave expansion and the modal expansion of electromagnetic waves. Simulation results reveal that the enhancement factor depends on the inverse coverage, reaching more than 1000 in a sub-micron wide rectangular hole. We also show that the resonance frequency is predominantly determined by the length of the rectangles while variations in the width and the thickness cause minor shifts in the resonant frequency.

KW - Diffraction theory

KW - Field enhancement

KW - Near-field

KW - Rectangular hole

KW - Terahertz

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Theoretical study of terahertz near-field enhancement assisted by shape resonance in rectangular hole arrays in metal films

Abstract

Keywords

ASJC Scopus subject areas

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