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6CCVD Research

Vector magnetometry using shallow implanted NV centers in diamond with waveguide-assisted dipole excitation and readout

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2025-02-01
JournalAPL Photonics
AuthorsSajedeh Shahbazi, Giulio Coccia, Argyro N. Giakoumaki, Johannes Lang, Vibhav Bharadwaj
InstitutionsNetherlands Institute for Radio Astronomy, Center for Integrated Quantum Science and Technology

Abstract

Section titled ā€œAbstractā€

On-chip magnetic field sensing with nitrogen-vacancy (NV) centers in diamond requires scalable integration of 3D waveguides into diamond substrates. Here, we develop a sensing array device with an ensemble of shallow implanted NV centers integrated with arrays of laser-written waveguides for excitation and readout of NV signals. Our approach enables an easy-to-operate on-chip magnetometer with a pixel size proportional to the Gaussian mode area of each waveguide. The performed continuous wave optically detected magnetic resonance on each waveguide gives an average dc-sensitivity value of (195Ā±3) nT/Hz, which can be improved with lock-in-detection or pulsed-microwave sequences. We apply a magnetic field to separate the four NV crystallographic orientations of the magnetic resonance and then utilize a DC current through a straight wire antenna close to the waveguide to prove the sensor capabilities of our device. We reconstruct the complete vector magnetic field in the NV crystal frame using three different NV crystallographic orientations. By knowing the polarization axis of the waveguide mode, we project the magnetic field vector into the lab frame.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2008 - Scanning magnetic field microscope with a diamond single-spin sensor [Crossref]
  2. 2010 - High sensitivity magnetic imaging using an array of spins in diamond [Crossref]
  3. 2018 - Mapping the microscale origins of magnetic resonance image contrast with subcellular diamond magnetometry [Crossref]
  4. 2013 - The nitrogen-vacancy colour centre in diamond [Crossref]
  5. 2013 - Nanoscale magnetometry with NV centers in diamond [Crossref]
  6. 2014 - Nitrogen-vacancy centers in diamond: Nanoscale sensors for physics and biology [Crossref]
  7. 2012 - Spin properties of very shallow nitrogen vacancy defects in diamond [Crossref]
  8. 2013 - Negatively charged nitrogen-vacancy centers in a 5Ā nm thin 12C diamond film [Crossref]
  9. 2022 - Diamond surface engineering for molecular sensing with nitrogenā€”Vacancy centers [Crossref]
  10. 2010 - Vector magnetic field microscopy using nitrogen vacancy centers in diamond [Crossref]

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