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On the Possibilities to Create a Negative Permittivity Metamaterial with Zero Imaginary Part of the Permittivity at a Specific Frequency-Electrical Network Theory Approach
KTH, Skolan för informations- och kommunikationsteknik (ICT), Fotonik och optik, Fotonik.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Fotonik och optik, Fotonik.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Fotonik och optik, Fotonik.
2012 (engelsk)Inngår i: IEEE Journal of Quantum Electronics, ISSN 0018-9197, E-ISSN 1558-1713, Vol. 48, nr 4, s. 507-511Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A permittivity function suggested in the literature describing a material that exhibits negative permittivity and no loss at a specific frequency (and losses at other frequencies) is analyzed using electrical network theory. An equivalent circuit of the polarization admittance consisting of RLC components is derived. Further, a proof is given showing that if the admittance is lossless at a specific frequency, then all components with losses (resistances) in the circuit have to be short circuited or blocked or virtually disconnected at this frequency by the use of ideal lossless resonant LC circuits. However, in the literature, inductors in metamaterials are associated with inherently lossy metal nanoparticles, hence invalidating the suggested permittivity function unless a lossless inductor at optical frequencies is found or proved possible.

sted, utgiver, år, opplag, sider
2012. Vol. 48, nr 4, s. 507-511
Emneord [en]
Electrical network theory, metamaterials, nanostructures, negative-permittivity materials
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-89645DOI: 10.1109/JQE.2011.2181824ISI: 000300424300010OAI: oai:DiVA.org:kth-89645DiVA, id: diva2:503207
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20120312Tilgjengelig fra: 2012-02-15 Laget: 2012-02-15 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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