Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 52: Focussed session: Coherence and coherent control in nanophotonics and plasmonics II

O 52.5: Vortrag

Mittwoch, 28. März 2012, 18:30–18:45, MA 005

Classical Analog of Electromagnetically Induced Absorption in Plasmonics — •Richard Taubert¹, Mario Hentschel^1,2, Jürgen Kästel³, and Harald Giessen¹ — ¹4th Physics Institute and Research Center SCoPE, University of Stuttgart, 70550 Stuttgart, Germany — ²Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany — ³Deutsches Zentrum für Luft- und Raumfahrt, Institut für Technische Physik, D-70569 Stuttgart, Germany

The ability to manipulate the phase shift between two coupled plasmonic resonances 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 phenomena can thus be termed classical analog of electromagnetically induced absorption.