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6CCVD Research

Mitigation of nitrogen vacancy photoluminescence quenching from material integration for quantum sensing

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-06-22
JournalMaterials for Quantum Technology
AuthorsJacob Henshaw, Pauli Kehayias, Luca Basso, Michael Jaris, Rong Cong
InstitutionsBrown University, Center for Integrated Nanotechnologies
Citations4

Abstract

Section titled ā€œAbstractā€

Abstract The nitrogen-vacancy (NV) color center in diamond has demonstrated great promise in a wide range of quantum sensing. Recently, there have been a series of proposals and experiments using NV centers to detect spin noise of quantum materials near the diamond surface. This is a rich complex area of study with novel nano-magnetism and electronic behavior, that the NV center would be ideal for sensing. However, due to the electronic properties of the NV itself and its host material, getting high quality NV centers within nanometers of such systems is challenging. Band bending caused by space charges formed at the metal-semiconductor interface force the NV center into its insensitive charge states. Here, we investigate optimizing this interface by depositing thin metal films and thin insulating layers on a series of NV ensembles at different depths to characterize the impact of metal films on different ensemble depths. We find an improvement of coherence and dephasing times we attribute to ionization of other paramagnetic defects. The insulating layer of alumina between the metal and diamond provide improved photoluminescence and higher sensitivity in all modes of sensing as compared to direct contact with the metal, providing as much as a factor of 2 increase in sensitivity, decrease of integration time by a factor of 4, for NV T 1 relaxometry measurements.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  5. 2019 - Probing magnetism in 2D materials at the nanoscale with single-spin microscopy [Crossref]
  6. 2021 - Magnetic domains and domain wall pinning in atomically thin CrBr3 revealed by nanoscale imaging [Crossref]
  7. 2022 - Nanoscale solid-state nuclear quadrupole resonance spectroscopy using depth-optimized nitrogen-vacancy ensembles in diamond [Crossref]
  8. 2016 - Wide-band nanoscale magnetic resonance spectroscopy using quantum relaxation of a single spin in diamond [Crossref]
  9. 2010 - Conversion of neutral nitrogen-vacancy centers to negatively charged nitrogen-vacancy centers through selective oxidation [Crossref]
  10. 2017 - Charge state stabilization of shallow nitrogen vacancy centers in diamond by oxygen surface modification [Crossref]

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