Toy model for plasmonic metamaterial resonances coupled to two-level system gain

TitleToy model for plasmonic metamaterial resonances coupled to two-level system gain
Publication TypeJournal Article
Year of Publication2008
AuthorsWegener M, Garcia-Pomar JL, Soukoulis CM, Meinzer N, Ruther M, Linden S
Journal TitleOptics Express
Volume16
Pages19785-19798
Date Published11/24
ISBN Number1094-4087
Accession NumberISI:000261561900038
Keywordsnegative-index metamaterials, wavelengths
Abstract

We propose, solve, and discuss a simple model for a metamaterial incorporating optical gain: A single bosonic resonance is coupled to a fermionic (inverted) two-level-system resonance via local-field interactions. For given steady-state inversion, this model can be solved analytically, revealing a rich variety of (Fano) absorption/gain lineshapes. We also give an analytic expression for the fixed inversion resulting from gain pinning under steady-state conditions. Furthermore, the dynamic response of the "lasing SPASER", i.e., its relaxation oscillations, can be obtained by simple numerical calculations within the same model. As a result, this toy model can be viewed as the near-field-optical counterpart of the usual LASER rate equations. (c) 2008 Optical Society of America

URL<Go to ISI>://000261561900038
DOI10.1364/OE.16.019785