Deterministic enhancement of coherent photon generation from a nitrogen-vacancy center in ultrapure diamond
By D. Riedel, Immo Sollner, B. Shields, Sebastian Starosielec, P. Appel, E. Neu, Patrick Maletinsky, R. Warburton. 2017
193 citations recorded by the source corpus.
The nitrogen-vacancy (NV) center in diamond has an optically addressable, highly coherent spin. However, an NV center even in high quality single-crystalline material is a very poor source of single photons: extraction out of the high-index diamond is inefficient, the emission of coherent photons represents just a few per cent of the total emission, and the decay time is large. In principle, all three problems can be addressed with a resonant microcavity. In practice, it has proved difficult to implement this concept: photonic engineering hinges on nano-fabrication yet it is notoriously difficult to process diamond without degrading the NV centers. We present here a microcavity scheme which uses minimally processed diamond, thereby preserving the high quality of the starting material, and a tunable microcavity platform. We demonstrate a clear change in the lifetime for multiple individual NV centers on tuning both the cavity frequency and anti-node position, a Purcell effect. The overall Purcell factor $F_{\rm P}=2.0$ translates to a Purcell factor for the zero phonon line (ZPL) of $F_{\rm P}^{\rm ZPL}\sim30$ and an increase in the ZPL emission probability from $\sim 3 \%$ to $\sim 46 \%$. By making a step-change in the NV's optical properties in a deterministic way, these results pave the way for much enhanced spin-photon and spin-spin entanglement rates.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/bef8deb78305c999441af59bea17aff44e22a700
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Citations in the corpus
- A link layer protocol for quantum networks (2019, background): “where pzero_phonon is the probability of emitting a photon in the zero phonon line (3% without cavity and 46% with cavity [85]) and pcollection is the probability of collection the photon into the fiber.”
- Deterministic delivery of remote entanglement on a quantum network (2017, background): “Further improvements to the photon detection efficiency (including enhancement of zero-phonon line emission) [32, 33] would lead to an additional increase of at least an order of magnitude.”