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Classification of electromagnetic resonances in finite inhomogeneous three-dimensional structures

Neil V. Budko·Alexander B. Samokhin
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Abstract

We present a simple and unified classification of macroscopic electromagnetic resonances in finite arbitrarily inhomogeneous isotropic dielectric 3D structures situated in free space. By observing the complex-plane dynamics of the spatial spectrum of the volume integral operator as a function of angular frequency and constitutive parameters we identify and generalize all the usual resonances, including complex plasmons, real laser resonances in media with gain, and real quasi-static resonances in media with negative permittivity and gain.

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Neil V. Budko, Alexander B. Samokhin. 2005-09-30. Classification of electromagnetic resonances in finite inhomogeneous three-dimensional structures. https://doi.org/10.1103/physrevlett.96.023904

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