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Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles

Jayakumar, H; Dhomkar, S; Henshaw, J; Meriles, CA; (2018) Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles. Applied Physics Letters , 113 (12) , Article 122404. 10.1063/1.5040261. Green open access

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Abstract

We demonstrate the optical readout of ensembles of nitrogen-vacancy (NV) center spins in a bulk diamond sample via spin-to-charge conversion. A high power 594 nm laser is utilized to selectively ionize these paramagnetic defects in the mS=0 spin state with a contrast of up to 12%. In comparison to the conventional 520 nm spin readout, the spin-to-charge-conversion-based readout provides a higher signal-to-noise ratio, with tenfold sensing measurement speedup for millisecond long pulse sequences. This level of performance was achieved for an NV− ionization of only 25%, limited by the ionization and readout laser powers. These observations pave the way to a range of high-sensitivity metrology applications where the use of NV− ensembles in bulk diamond has proven useful, including sensing and imaging of target materials overlaid on the diamond surface.

Type: Article
Title: Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.5040261
Publisher version: https://doi.org/10.1063/1.5040261
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10057222
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