Open AccessCharacterisation of CVD diamond with high concentrations of nitrogen for magnetic-field sensing applications
Author(s) -
Andrew M. Edmonds,
Connor Hart,
Matthew Turner,
Pierre-Olivier Colard,
Jennifer Schloss,
Kevin Olsson,
Raisa Trubko,
Matthew Markham,
Adam Rathmill,
Ben Horne-Smith,
Wilbur Lew,
Arul Manickam,
Scott A. Bruce,
Peter G. Kaup,
Jon Russo,
Michael J. DiMario,
Joseph T. South,
Jay T. Hansen,
Daniel J. Twitchen,
Ronald L. Walsworth
Publication year - 2021
Publication title -
materials for quantum technology
Language(s) - English
Resource type - Journals
ISSN - 2633-4356
DOI - 10.1088/2633-4356/abd88a
Subject(s) - diamond , materials science , nitrogen , chemical vapor deposition , fabrication , analytical chemistry (journal) , nanotechnology , chemistry , environmental chemistry , metallurgy , medicine , alternative medicine , organic chemistry , pathology
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 − ([NV − ]) 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 − ] and T 2 * 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.