Enhancement of spin-to-charge conversion of diamond NV centers at ambient conditions using surface electrodes

Liam Hanlon, Michael Olney-Fraser, Marcus W. Doherty, Lukas Razinkovas

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    1 Citation (Scopus)

    Abstract

    The nitrogen-vacancy (NV) center in diamond is a heavily studied defect due to its potential applications to quantum metrology and computation, particularly in ambient conditions. The key mechanism to using the NV in any application lies in the ability to read out the spin state of the defect which is typically done optically. The optical contrast is then the key metric for electron spin readout fidelity and one of the key limiting factors in the NV's overall performance. We present a mechanism for high contrast readout using the spin-to-charge conversion mechanism in conjunction with an electrode to improve the spin contrast by altering the NV energy levels relative to the diamond conduction band. Theoretical modeling predicts an optical spin contrast at 42% which would be the highest optical contrast for the NV at room temperature and the technique opens up a range of alternative research pathways for the NV which are discussed.

    Original languageEnglish
    Article number134111
    JournalPhysical Review B
    Volume107
    Issue number13
    DOIs
    Publication statusPublished - 1 Apr 2023

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