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  4. The effect of nitrogen concentration on quantum sensing with nitrogen-vacancy centres
 
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2019
Conference Paper
Title

The effect of nitrogen concentration on quantum sensing with nitrogen-vacancy centres

Abstract
The nitrogen-vacancy (NV) centre in diamond is a perfect candidate for quantum sensing applications applied to numerous fields of science. Past studies improved the sensitivity of diamonds containing NV centres by increasing their density or prolonging their coherence time. However, few studies discussed the effects of other defects inside the diamond crystal on the sensitivity of the NV centres. In this study, we demonstrated the implication of single substitutional nitrogen defects on the fluorescence emission, charge state stability, coherence time and sensitivity of the NV centres. We found that there is an optimal concentration of nitrogen defects that allows diamond samples to have a high-density of NV centres and high fluorescence without significantly affecting the coherence time. This results will inform the correct choice of diamond characteristics for current and future quantum sensing applications with the NV centres.
Author(s)
Capelli, Marco
ARC Centre of Excellence for Nanoscale Biophotonics, RMIT University
Abe, Hiroshi
National Institutes for Quantum and Radiological Science and Technology, Japan
Ohshima, Takeshi
National Institutes for Quantum and Radiological Science and Technology, Japan
Johnson, Brett C.
School of Physics, University of Melbourne
Simpson, David A.
School of Physics, University of Melbourne
Jeske, Jan  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Greentree, Andrew D.
ARC Centre of Excellence for Nanoscale Biophotonics, RMIT University
Reineck, P.
ARC Centre of Excellence for Nanoscale Biophotonics, RMIT University
Gibson, Brant C.
ARC Centre of Excellence for Nanoscale Biophotonics, RMIT University
Mainwork
Biophotonics Australasia 2019  
Conference
Conference "Biophotonics Australasia" 2019  
DOI
10.1117/12.2541225
Language
English
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Keyword(s)
  • nitrogen-vacancy centre

  • magnetometry

  • diamond

  • P1 centre

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