Broadband magnetometry and temperature sensing with a light-trapping diamond waveguide
By Hannah A. Clevenson, Matthew E. Trusheim, C. Teale, T. Schröder, D. Braje, Dirk Englund. Nature Physics, 2014
274 citations recorded by the source corpus.
Nitrogen–vacancy centres offer significant promise as nanoscale magnetometers. A light-trapping diamond waveguide is demonstrated, enhancing the temperature and magnetic field sensitivity of such centres by three orders of magnitude. Solid-state quantum sensors are attracting wide interest because of their sensitivity at room temperature. In particular, the spin properties of individual nitrogen–vacancy (NV) colour centres in diamond1,2,3 make them outstanding nanoscale sensors of magnetic fields4,5,6,7,8,9, electric fields10 and temperature11,12,13 under ambient conditions. Recent work on NV ensemble-based magnetometers14,15,16, inertial sensors17, and clocks18 has employed unentangled colour centres to realize significant improvements in sensitivity15,19. However, to achieve this potential sensitivity enhancement in practice, new techniques are required to excite efficiently and to collect the optical signal from large NV ensembles. Here, we introduce a light-trapping diamond waveguide geometry with an excitation efficiency and signal collection that enables in excess of 5% conversion efficiency of pump photons into optically detected magnetic resonance20 (ODMR) fluorescence—an improvement over previous single-pass geometries of more than three orders of magnitude. This marked enhancement of the ODMR signal enables precision broadband measurements of magnetic field and temperature in the low-frequency range, otherwise inaccessible by dynamical decoupling techniques.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/5eee5a29f0ef51fb232575b7a40a7ddbc79d5838
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Citations in the corpus
- Sensitivity optimization for NV-diamond magnetometry (2019, methodology): “Given the square-root improvement of sensitivity with number of interrogated spins, we primarily concentrate on ensemble-based devices with & 104 NV- centers (Acosta et al., 2009; Barry et al., 2016; Clevenson et al., 2015; Le Sage et al., 2012; Wolf et al., 2015).”
- Quantum nanophotonics in diamond [Invited] (2016, background): “5 nTHz−1∕2 in the low-frequency regime around 1 Hz [18,20].”