Emission and nonradiative decay of nanodiamond NV centers in a low refractive index environment

F.A. Inam, M.D.W. Grogan, M. Rollings, T. Gaebel, J.M. Say, C. Bradac, T.A. Birks, W.J. Wadsworth, S. Castelletto, J.R. Rabeau, M.J. Steel

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Abstract

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 (∼0.7) of the nanodiamond NV emitters.
Original languageEnglish
Pages (from-to)3833-3843
Number of pages11
JournalACS Nano
Volume7
Issue number5
Early online date15 Apr 2013
DOIs
Publication statusPublished - 28 May 2013

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Inam, F. A., Grogan, M. D. W., Rollings, M., Gaebel, T., Say, J. M., Bradac, C., ... Steel, M. J. (2013). Emission and nonradiative decay of nanodiamond NV centers in a low refractive index environment. ACS Nano, 7(5), 3833-3843. https://doi.org/10.1021/nn304202g