My research is focused on solid-state quantum optics. In the past few years I have, for example, investigated methods to collect single photons with near-unity efficiency. Another emphasis is on techniques which can be used to enhance the interaction of a single photon with a single emitter.
Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator
Stephan Götzinger,
L. de S. Menezes,
O. Benson,
D.V. Talapin,
N. Gaponik,
H. Weller,
A.L. Rogach,
Vahid Sandoghdar
Journal of Optics B: Quantum and Semiclassical Optics
6
154-158
(2004)
| Journal
We report on experiments where we used a home-made confocal microscope to excite single nanocrystals on a high-Q microsphere resonator. In that way spectra of an individual quantum emitter could be recorded. The Q factor of the microspheres coated with nanocrystals was still up to 10(9). We also demonstrate the use of a prism coupler as a well-defined output port to collect the fluorescence of an ensemble of nanocrystals coupled to whispering-gallery modes.
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