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Q: Fachverband Quantenoptik und Photonik

Q 29: Poster Quanteneffekte

Q 29.2: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

Towards controlled Cavity-QED experiments with toroidal microresonators — •Rico Henze¹, Markus Gregor¹, Tim Schröder¹, Helmar Kostial², Edith Wiebicke², and Oliver Benson¹ — ¹AG Nano-Optik, Institut für Physik, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin — ²Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin

Optical microresonators are interesting systems to study the light-matter interaction on the nanometer scale. The so-called Whispering Gallery Modes (WGM) in spherical resonators offer high spatial and temporal light confinement, a prerequisite for Cavity-QED experiments. We report the production and optical characterization of chip-based SiO₂ toroidal microresonators which we produce by standard clean room techniques. A tapered optical fiber is implemented as an efficient light coupler. Combined with scanning probes (SNOM and AFM) a versatile setup is created that allows to study the optical mode structure of the WGMs in a toroidal cavity or to position nanoscopic emitters on the resonator surface at will.