title: Classical analog of electromagnetically induced absorption in plasmonics.
abstract: The ability to manipulate the phase shift between two resonantly coupled plasmonic oscillators in a controlled fashion has been unavailable up to now. Here we present a strategy to overcome this limitation by employing the benefits of near-field coupling on the one hand and retardation effects due to far-field coupling on the other hand. We theoretically and experimentally demonstrate that in the intermediate regime the coupling of a broad dipolar to a narrow dark quadrupolar plasmon resonance is possible while simultaneously allowing for a retardation-induced phase shift. This leads to constructive interference and enhanced absorption. The observed phenomenon can thus be termed a classical analog of electromagnetically induced absorption.
authors.affiliation: 4th Physics Institute and Research Center SCoPE, University of Stuttgart, D-70569 Stuttgart, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Taubert
authors.forename: Mario
authors.initials: M
authors.lastname: Hentschel
authors.forename: Jürgen
authors.initials: J
authors.lastname: Kästel
authors.forename: Harald
authors.initials: H
authors.lastname: Giessen
mesh_terms: D000042:Absorption; D003198:Computer Simulation; D004574:Electromagnetic Fields; D008027:Light; D008962:Models, Theoretical; D009991:Oscillometry / Q000379:methods*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*