Equal-potential interpretation of electrically induced resonances in metamaterials

Liang Peng, N. Asger Mortensen

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Resumé

We propose a general description of electrically induced resonances (EIR) in metamaterials (MMs) comprising subwavelength unit cells. Based on classical electrodynamics, we found that EIR is governed by an equal-potential effect. Our theory accounts for the EIR phenomena and can give a renewed definition of the effective electric field and hence effective permittivity for MMs made of either dielectrics or metals as well as combinations thereof. The EIR, inherent to the periodic structures, may be the unifying origin of recently observed anomalous electromagnetic phenomena, e.g. the enhanced transmission, the suppressed transmission and the enhanced absorption by a variety of metal film structures in the terahertz range.
OriginalsprogEngelsk
TidsskriftNew Journal of Physics
Vol/bind13
Udgave nummer5
Sider (fra-til)053012
ISSN1367-2630
DOI
StatusUdgivet - 2011
Udgivet eksterntJa

Fingeraftryk

metal films
electrodynamics
permittivity
electromagnetism
electric fields
cells
metals

Bibliografisk note

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Citer dette

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Equal-potential interpretation of electrically induced resonances in metamaterials. / Peng, Liang; Mortensen, N. Asger.

I: New Journal of Physics, Bind 13, Nr. 5, 2011, s. 053012.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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AU - Mortensen, N. Asger

N1 - Third parties have the same rights to reuse articles in NJP as described in the Creative Commons Attribution-Non-Commercial-ShareAlike 3.0 license. These open-access rights allow third-party users to copy, distribute and display the published version of articles in NJP, and create derivative works, subject to appropriate attribution and non-commercial exploitation.

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AB - We propose a general description of electrically induced resonances (EIR) in metamaterials (MMs) comprising subwavelength unit cells. Based on classical electrodynamics, we found that EIR is governed by an equal-potential effect. Our theory accounts for the EIR phenomena and can give a renewed definition of the effective electric field and hence effective permittivity for MMs made of either dielectrics or metals as well as combinations thereof. The EIR, inherent to the periodic structures, may be the unifying origin of recently observed anomalous electromagnetic phenomena, e.g. the enhanced transmission, the suppressed transmission and the enhanced absorption by a variety of metal film structures in the terahertz range.

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DO - 10.1088/1367-2630/13/5/053012

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