Deterministic enhancement of coherent photon generation from a nitrogen-vacancy center in ultrapure diamond

Riedel D, Sollner I, Shields BJ, Starosielec S, Appel P, Neu E, Maletinsky P, Warburton RJ (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review X American Physical Society

Book Volume: 7

Article Number: 031040

Journal Issue: 3

DOI: 10.1103/PhysRevX.7.031040

Abstract

The nitrogen-vacancy (NV) center in diamond has an optically addressable, highly coherent spin. However, a 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 percent 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 nanofabrication, yet it is notoriously difficult to process diamond without degrading the NV centers. Here, we present a microcavity scheme that 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 antinode position, a Purcell effect. The overall Purcell factor FP ¼ 2.0 translates to a Purcell factor for the zero phonon line (ZPL) of FZPLP ∼ 30 and an increase in the ZPL emission probability from about 3% to 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.

Involved external institutions

Universität Basel CH Switzerland (CH)

How to cite

APA:

Riedel, D., Sollner, I., Shields, B.J., Starosielec, S., Appel, P., Neu, E.,... Warburton, R.J. (2017). Deterministic enhancement of coherent photon generation from a nitrogen-vacancy center in ultrapure diamond. Physical Review X, 7(3). https://dx.doi.org/10.1103/PhysRevX.7.031040

MLA:

Riedel, Daniel, et al. "Deterministic enhancement of coherent photon generation from a nitrogen-vacancy center in ultrapure diamond." Physical Review X 7.3 (2017).

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