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

Harishankar Jayakumar, Siddharth Dhomkar, Jacob Henshaw, Carlos A. Meriles

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Article number122404
JournalApplied Physics Letters
Volume113
Issue number12
DOIs
StatePublished - Sep 17 2018
Externally publishedYes

Bibliographical note

Funding Information:
All authors acknowledge the support from the National Science Foundation through grants NSF-1619896 and NSF-1547830 and from Research Corporation for Science Advancement through a FRED Award.

Publisher Copyright:
© 2018 Author(s).

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