Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-09-17 |
| Journal | Applied Physics Letters |
| Authors | Harishankar Jayakumar, Siddharth Dhomkar, Jacob Henshaw, Carlos A. Meriles |
| Institutions | City College of New York, The Graduate Center, CUNY |
| Citations | 24 |
Abstract
Section titled āAbstractāWe 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 NVā 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 NVā ensembles in bulk diamond has proven useful, including sensing and imaging of target materials overlaid on the diamond surface.