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Q: Fachverband Quantenoptik und Photonik
Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik
Q 15.81: Poster
Monday, March 14, 2011, 16:30–19:30, P1
Plasmon-mediated interaction and level shifts of atoms: a Green's function approach — •David Dzsotjan1,2 and Michael Fleischhauer1 — 1TU Kaiserslautern, Kaiserslautern, Germany — 2RMKI-KFKI, Budapest, Hungary
We investigate the long-range coupling of individual atoms placed close to metallic nanowires. Putting the emitter close to the surface of a thin wire, a strong Purcell effect can be observed due to the extremely small transverse mode area of the surface plasmon modes: the emitter will decay into guided surface plasmon modes of the wire with a rate exceeding that of free space by a large factor. Placing a pair of emitters along the wire, we observe a strong, wire- mediated long-range interaction between the emitters. As a result, super- and subradiance can occur over distances large compared to the resonant wavelength. The states with enhanced or suppressed decay rate are the symmetric or anti-symmetric Dicke states. Besides the modification of decay rates, dipole-dipole shifts emerge due to the wire-mediated interaction, which we calculate explicitly. Coupling more atoms to a wire network with a nontrivial coupling topology leads to interesting entangled subradiant states of the system.