Electromagnetic modes in cavities made of negative-index metamaterials.

Wiersig, Jan and Unterhinninghofen, Julia and Schomerus, Henning and Peschel, Ulf and Hentschel, Martina (2010) Electromagnetic modes in cavities made of negative-index metamaterials. Physical review a, 81 (2). 023809. ISSN 1050-2947

Full text not available from this repository.

Abstract

We discuss electromagnetic modes in cavities formed by metamaterials with negative refraction and demonstrate that the straightforward approach to substitute negative values of the electric permittivity and the magnetic permeability leads to quasibound states with a negative quality factor. To ensure positive quality factors and a consistent physical interpretation of the quasibound states it is essential to include the frequency dispersion of the permittivity and the permeability, as required by positive field energy and causality. The basic mode equation and the boundary conditions including linear frequency dispersion are derived. As an example we consider a disklike cavity with deformed cross-sectional shape. The transition from the unphysical nondispersive case with negative quality factors to the dispersive case with positive quality factors is demonstrated numerically and in an analytical perturbative treatment.

Item Type: Journal Article
Journal or Publication Title: Physical review a
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 32042
Deposited By: Dr Henning Schomerus
Deposited On: 13 Apr 2010 09:17
Refereed?: Yes
Published?: Published
Last Modified: 22 Jun 2019 02:47
URI: https://eprints.lancs.ac.uk/id/eprint/32042

Actions (login required)

View Item View Item