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Laser threshold magnetometry using the negatively charged nitrogen-vacancy (NV-) centre in diamond as a gain medium has been proposed as a technique to dramatically enhance the sensitivity of room-temperature magnetometry. We experimentally explore a diamond-loaded open tunable fibre-cavity system as a potential contender for the realisation of lasing with NV- centres. We observe amplification of the transmission of a cavity-resonant seed laser at 721 nm when the cavity is pumped at 532 nm and attribute this to stimulated emission. Changes in the intensity of spontaneously emitted photons accompany the amplification, and a qualitative model including stimulated emission and ionisation dynamics of the NV- centre captures the dynamics in the experiment very well. These results highlight important considerations in the realisation of an NV- laser in diamond.
|Number of pages||14|
|Early online date||28 Sep 2020|
|Publication status||Published - Nov 2020|
Bibliographical noteCopyright 2020 Sarath Raman Nair et al., published by De Gruyter. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
- diamond colour centres
- fibre cavity
- laser threshold magnetometry
- nitrogen-vacancy centres
- NV charge state switching
- NV-stimulated emission
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ARC Centre of Excellence for Quantum Engineered Systems (EQuS) (RAAP)
Volz, T. & Doherty, A. C.
5/04/17 → …