Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 87: Carbon: Diamond and others
HL 87.5: Vortrag
Freitag, 24. März 2017, 11:00–11:15, POT 06
Enhancement of the zero-phonon emission rate of an NV centre in minimally processed diamond — •Daniel Riedel, Patrick Maletinsky, and Richard J. Warburton — Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
The precise optical control of the coherent spin associated with the nitrogen vacancy (NV) centre in diamond enables both solid-state-based quantum information experiments and ultra-precise sensing. For future applications it is crucial to improve the interrogation frequency by engineering the photonic modes, for instance by embedding the NV centres into nanophotonic structures. A key challenge is to maintain a stable environment in the diamond in order to preserve the long optical and spin coherence times.
Here, for the first time, we report cavity-assisted Purcell enhancement of the zero-phonon line (ZPL) of a single NV centre in a minimally processed diamond membrane. The membrane is incorporated into a fully tunable Fabry-Perot microcavity, where photons are deterministically coupled to the TEM00 mode rendering them suitable for long distance communication. We find a 20-fold enhancement of the ZPL emission photon flux, which corresponds to an overall change in the radiative lifetime from 11 ns out of resonance to 7 ns on resonance.
Our approach constitutes a promising route towards a scalable quantum-network based on solid-state emitters.