High bandwidth heterodyne sensing with bulk NV diamond

@misc{taylor2026high,
  title = {{High bandwidth heterodyne sensing with bulk NV diamond}},
  author = {H. A. M. Taylor and J. P. Duff and L. B. Miller and A. Tritt and M. S. Oldfield and K. Helmerson and M. S. J. Barson},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.39022},
  eprint = {2610.39022},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.39022},
  note = {CC BY-NC-SA 4.0},
}

TY  - UNPB
TI  - High bandwidth heterodyne sensing with bulk NV diamond
AU  - H. A. M. Taylor
AU  - J. P. Duff
AU  - L. B. Miller
AU  - A. Tritt
AU  - M. S. Oldfield
AU  - K. Helmerson
AU  - M. S. J. Barson
PY  - 2026
DA  - 2026/10/28
PB  - arXiv
DO  - 10.48550/arxiv.2610.39022
UR  - https://arxiv.org/abs/2610.39022
AB  - Developing high performance portable sensors is of significant importance for both terrestrial and satellite communications, with quantum sensors offering potential advantages in sensitivity and bandwidth. The nitrogen vacancy center in diamond is a popular quantum sensing platform for its relative simplicity and wide range of acceptable operating conditions, but suffers a limited instantaneous bandwidth due to the narrow linewidth of the spin resonance. In this work, we first present a magnetic quantum sensing scheme utilizing heterodyne mixing with strong optical and microwave driving, achieving MHz-scale instantaneous bandwidth with a sensitivity of 548 pT/√(Hz) in an active diamond volume of $ 2.5\times 10^{-4} \; \text{mm}^3$ with 2 × 10^11 NV centers. We then demonstrate expansion of the sensing bandwidth by employing a strong magnetic gradient and many individually modulated microwave control fields, expanding the single resonance bandwidth to 48 MHz with a peak sensitivity of 8.5 nT/√(Hz).
ER  -