Frequency selective heterojunction metal-insulator-metal mirror for surface plasmons

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The authors introduce a mode-gap mirror for surface plasmon polaritons in a metal-insulator-metal (MIM) structure. At the heterojunction of MIMs which consists of two MIMs of different insulators, it is shown that a mode gap exists for a certain frequency range and the junction works as an effective mirror. Transmission and reflection properties of plasmonic modes at the interface of the heterojunction are investigated, and explained by the band theory. By showing that the mirror has high reflection and transmission of nearly zero, it is verified that the frequency range in which no plasmonic modes exist is an actual mode-gap range. It is also shown that by varying both the thickness and the dielectric constant of the insulator layer, one can select the frequency range in which the reflection coefficient is greater than 0.9.
Publisher
Amer Physical Soc
Issue Date
2011
Language
English
Article Type
Article
Keywords

BRAGG REFLECTOR; TRANSMISSION; WAVES; FILMS; LIGHT

Citation

PHYSICAL REVIEW B , v.83, no.23

ISSN
1098-0121
URI
http://hdl.handle.net/10203/98641
Appears in Collection
MS-Journal Papers(저널논문)PH-Journal Papers(저널논문)
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