Ab initio theory of Fano resonances in plasmonic nanostructures and metamaterials

Autor:	Gallinet, Benjamin, Martin, Olivier J. F.
Rok vydání:	2011
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.235427
Popis:	An ab initio theory for Fano resonances in plasmonic nanostructures and metamaterials is developed using Feshbach formalism. It reveals the role played by the electromagnetic modes and material losses in the system, and enables the engineering of Fano resonances in arbitrary geometries. A general formula for the asymmetric resonance in a non-conservative system is derived. The influence of the electromagnetic interactions on the resonance line shape is discussed and it is shown that intrinsic losses drive the resonance contrast, while its width is mostly determined by the coupling strength between the non-radiative mode and the continuum. The analytical model is in perfect agreement with numerical simulations. Comment: 13 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1105.2503 Zobrazit plný text záznamu View this record from Arxiv