Nitrogen vacancy centres in diamond for laser threshold magnetometry

Zahraa Al-Baiaty*, Felix Hahl, Sarath R. Nair, Lachlan Rogers, Brant C. Gibson, Richard P. Mildren, Thomas Volz, Jan Jeske, Andrew D. Greentree

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


High precision magnetometry is important for a range of applications from the monitoring of biologically generated magnetic fields (e.g. magnetoencephalography and magnetocardiography), to navigation in GPS denied environments, to the detection of gravitational waves. Diamond containing the negatively-charged nitrogen vacancy colour centre (NV-) has emerged as a powerful room-Temperature sensing solution. Here we explore NV- centres as a laser medium for a new form of magnetometry: laser threshold magnetometry (LTM). LTM works by placing NV- inside an optical cavity and uses the coherent laser output as a potentially more sensitive readout channel than is possible using conventional (incoherent) optically detected magnetic resonance. Here we show progress towards LTM with diamond. We show twolaser excitation and stimulated emission in free space, and report progress towards diamond-cavity experiments. Our studies highlight the need for different NV- optimisation for laser applications, rather than those conventionally used for quantum information applications.

Original languageEnglish
Title of host publicationBiophotonics Australasia 2019
EditorsEwa M. Goldys, Brant C. Gibson
Place of PublicationBellingham, Washington
Number of pages4
ISBN (Electronic)9781510631458
ISBN (Print)9781510631441
Publication statusPublished - 30 Dec 2019
EventBiophotonics Australasia 2019 - Melbourne, Australia
Duration: 9 Dec 201912 Dec 2019

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceBiophotonics Australasia 2019


  • Laser threshold magnetometry
  • NV centre in diamond
  • Fabry-Perot cavity
  • stimulated emission

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