Characterisation of CVD diamond with high concentrations of nitrogen for magnetic-field sensing applications
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2021-01-05 |
| Journal | Materials for Quantum Technology |
| Authors | Andrew M. Edmonds, Connor Hart, Matthew Turner, Pierre-Olivier Colard, Jennifer M. Schloss |
| Institutions | Lockheed Martin (United States), University of Maryland, College Park |
| Citations | 73 |
Abstract
Section titled âAbstractâAbstract 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 S ) and NV. In such material, the achievable concentration of NV â ([NV â ]) is found to be influenced by the as-grown properties. At the 10-20 ppm level for [N S ], the production of CVD-grown material with strain levels sufficient not to limit achievable device sensitivity is demonstrated and a favourable product of [NV â ] and <mml:math xmlns:mml=âhttp://www.w3.org/1998/Math/MathMLâ display=âinlineâ overflow=âscrollâ> <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> 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.