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Nano Lett. 2006 Jun;6(6):1151-4.

Controlled photon transfer between two individual nanoemitters via shared high-Q modes of a microsphere resonator.

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  • 1Nano-Optics, Humboldt University, Hausvogteiplatz 5-7, D-10117 Berlin, Germany.


We realize controlled cavity-mediated photon transfer between two single nanoparticles over a distance of several tens of micrometers. First, we show how a single nanoscopic emitter attached to a near-field probe can be coupled to high-Q whispering-gallery modes of a silica microsphere at will. Then we demonstrate transfer of energy between this and a second nanoparticle deposited on the sphere surface. We estimate the photon transfer efficiency to be about 6 orders of magnitude higher than that via free-space propagation at comparable separations.

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