Abstract
We present a simple theoretical model to study the effect of a substrate on the resonance of an aperture in a thin metal film. The transmitted energy through an aperture is shown to be governed by the coupling of aperture waveguide mode to the incoming and the outgoing electromagnetic waves into the substrate region. Aperture resonance in the energy transmission thus depends critically on the refractive index of a substrate. We explain the substrate effect on aperture resonance in terms of destructive interference among evanescent modes or impedance mismatch. Our model shows an excellent agreement with a rigorous FDTD calculation and is consistent with previous experimental observations.
| Original language | English |
|---|---|
| Pages (from-to) | 15652-15658 |
| Number of pages | 7 |
| Journal | Optics Express |
| Volume | 17 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2009 Aug 31 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Substrate effect on aperture resonances in a thin metal film. / Kang, J. H.; Choe, Jong Ho; Kim, D. S.; Park, Q Han.
In: Optics Express, Vol. 17, No. 18, 31.08.2009, p. 15652-15658.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Substrate effect on aperture resonances in a thin metal film
AU - Kang, J. H.
AU - Choe, Jong Ho
AU - Kim, D. S.
AU - Park, Q Han
PY - 2009/8/31
Y1 - 2009/8/31
N2 - We present a simple theoretical model to study the effect of a substrate on the resonance of an aperture in a thin metal film. The transmitted energy through an aperture is shown to be governed by the coupling of aperture waveguide mode to the incoming and the outgoing electromagnetic waves into the substrate region. Aperture resonance in the energy transmission thus depends critically on the refractive index of a substrate. We explain the substrate effect on aperture resonance in terms of destructive interference among evanescent modes or impedance mismatch. Our model shows an excellent agreement with a rigorous FDTD calculation and is consistent with previous experimental observations.
AB - We present a simple theoretical model to study the effect of a substrate on the resonance of an aperture in a thin metal film. The transmitted energy through an aperture is shown to be governed by the coupling of aperture waveguide mode to the incoming and the outgoing electromagnetic waves into the substrate region. Aperture resonance in the energy transmission thus depends critically on the refractive index of a substrate. We explain the substrate effect on aperture resonance in terms of destructive interference among evanescent modes or impedance mismatch. Our model shows an excellent agreement with a rigorous FDTD calculation and is consistent with previous experimental observations.
UR - http://www.scopus.com/inward/record.url?scp=69949105235&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69949105235&partnerID=8YFLogxK
U2 - 10.1364/OE.17.015652
DO - 10.1364/OE.17.015652
M3 - Article
C2 - 19724564
AN - SCOPUS:69949105235
VL - 17
SP - 15652
EP - 15658
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 18
ER -