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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Controlled coupling of a single emitter to a single mode of a microsphere: where do we stand?

Stephan Götzinger, Leonardo dS Menezes, Andrea Mazzei, Oliver Benson, Dmitri V Talapin, Nicolaj Gaponik, Horst Weller, Andrey L Rogach, and Vahid Sandoghdar (2003)

Controlled coupling of a single emitter to a single mode of a microsphere: where do we stand?

In: Laser Resonators and Beam Control VI, vol. 4969, pp. 207-214. Proc. of SPIE.

We measured the coupling of the florescence from semiconductor nano-crystals and sub-micron sized dye-doped beads to high-Q whispering gallery modes (WGM) of a microsphere resonator. With Q-factors as high as 109 the florescence could be extracted in a controlled way via a prism coupler. We observed nearly 100 % modulation inthe spectrum which reflects the coupling to the WGMs. With the help of a beam scanning confocal microscope we were able to address a single 500 nm sized dye-doped bead on the sphere's surface and to collect and analyze its florescence in a well defined manner via the prism coupler.