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arXiv · 1809.07380

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

Harishankar Jayakumar·Siddharth Dhomkar·Jacob Henshaw·Carlos A. Meriles
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Abstract

We demonstrate 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 spin state with a contrast of up to 12%. In comparison with the conventional 520 nm spin readout, spin-to-charge-conversion-based readout provides 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.

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Harishankar Jayakumar, Siddharth Dhomkar, Jacob Henshaw, Carlos A. Meriles. 2018-09-19. Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles. https://doi.org/10.1063/1.5040261

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