Journal
ACS NANO
Volume 7, Issue 5, Pages 3833-3843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn304202g
Keywords
single-photon source; spontaneous emission rate; aerogel environment; single center emission; diamond NV center; quantum efficiency
Categories
Funding
- Australian Research Council under the ARC Center of Excellence Program (EQuS) [CE110001013]
- EPSRC [EP/F018622/1]
- Leverhulme Trust
- EPSRC [EP/F018622/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F018622/1] Funding Source: researchfish
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The nitrogen vacancy (NV) center is the most widely studied single optical defect in diamond with great potential for applications in quantum technologies. Development of practical single-photon devices requires an understanding of the emission under a range of conditions and environments. In this work, we study the properties of a single NV center in nanodiamonds embedded In an air-like silica aerogel environment which provides a new domain for probing the emission behavior of NV centers in nanoscale environments. In this arrangement, the emission rate is governed primarily by the diamond crystal lattice with negligible contribution from the surrounding environment. This is in contrast to the conventional approach of studying nanodiamonds on a glass coverslip. We observe an increase in the mean lifetime due to the absence of a dielectric interface near the emitting dipoles and a distribution arising from the irregularities in the nanodiamond geometry. Our approach results in the estimation of the mean quantum efficiency (similar to 0.7) of the nanodiamond NV emitters.
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