Hanno Kaupp, Christian Deutsch, Huan-Cheng Chang, Jakob Reichel, Theodor W. Hänsch, David Hunger
We employ a fiber-based optical microcavity with high Finesse to study the enhancement of fluorescence emission of NV centers in nanodiamonds. Harnessing the full tunability and open access of the resonator, we explicitly demonstrate the scaling laws of the Purcell enhancement by varying both the mode volume and the quality factor over a large range. While changes in the emission lifetime remain small in the regime of a broadband emitter, we observe an ideal Purcell factor of up to 450. Our results show a way for the realization of wavelength-tunable, narrow-band single-photon sources and demonstrate a system that has the potential to reach the strong coupling regime.
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http://arxiv.org/abs/1304.0948
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