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

doi:10.1117/12.2539583

30 December 2019 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

Author Affiliations +

Proceedings Volume 11202, Biophotonics Australasia 2019; 112020S (2019) https://doi.org/10.1117/12.2539583
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

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

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Zahraa Al-Baiaty, Felix Hahl, Sarath R. Nair, Lachlan Rogers, Brant C. Gibson, Richard P. Mildren, Thomas Volz, Jan Jeske, and Andrew D. Greentree "Nitrogen vacancy centres in diamond for laser threshold magnetometry", Proc. SPIE 11202, Biophotonics Australasia 2019, 112020S (30 December 2019); https://doi.org/10.1117/12.2539583

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