Characterisation of CVD diamond with high concentrations of nitrogen for magnetic-field sensing applications

Media type: E-Article
Title: Characterisation of CVD diamond with high concentrations of nitrogen for magnetic-field sensing applications
Contributor: Edmonds, Andrew M; Hart, Connor A; Turner, Matthew J; Colard, Pierre-Olivier; Schloss, Jennifer M; Olsson, Kevin S; Trubko, Raisa; Markham, Matthew L; Rathmill, Adam; Horne-Smith, Ben; Lew, Wilbur; Manickam, Arul; Bruce, Scott; Kaup, Peter G; Russo, Jon C; DiMario, Michael J; South, Joseph T; Hansen, Jay T; Twitchen, Daniel J; Walsworth, Ronald L
imprint: IOP Publishing, 2021
Published in: Materials for Quantum Technology
Language: Not determined
DOI: 10.1088/2633-4356/abd88a
ISSN: 2633-4356
Keywords: General Medicine
Origination:
Footnote:
Description: <jats:title>Abstract</jats:title> <jats:p>Ensembles of nitrogen-vacancy (NV) centres in diamond are a leading platform for practical quantum sensors. Reproducible and scalable fabrication of NV-ensembles with desired properties is crucial, as is an understanding of how those properties influence performance. This work addresses these issues by characterising nitrogen-doped diamond produced by the chemical vapour deposition (CVD) method across a range of synthesis conditions. This is shown to produce material with widely differing absorption characteristics, which is linked to the level of defects other than substitutional nitrogen (N<jats:sub>S</jats:sub>) and NV. In such material, the achievable concentration of NV<jats:sup>−</jats:sup> ([NV<jats:sup>−</jats:sup>]) is found to be influenced by the as-grown properties. At the 10–20 ppm level for [N<jats:sub>S</jats:sub>], the production of CVD-grown material with strain levels sufficient not to limit achievable device sensitivity is demonstrated and a favourable product of [NV<jats:sup>−</jats:sup>] and <jats:inline-formula> <jats:tex-math><?CDATA ${T}_{2}^{{\ast}}$?></jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>*</mml:mo> </mml:mrow> </mml:msubsup> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="mqtabd88aieqn1.gif" xlink:type="simple" /> </jats:inline-formula> is obtained. Additionally, reproducible properties over a batch of 23 samples from a single synthesis run are achieved, which appears promising for the scalability efforts underway in this area of research.</jats:p>
Access State: Open Access

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