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Updated: May 31, 2026

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
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Photonic-integrated quantum sensor array for microscale magnetic localisation.

Hao-Cheng Weng1, John G Rarity2, Krishna C Balram2

  • 1Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol, United Kingdom. haocheng.weng@bristol.ac.uk.

Nature Communications
|May 28, 2026
PubMed
Summary
This summary is machine-generated.

This study integrates nitrogen-vacancy (NV) centers with photonic circuits for scalable quantum sensing. The developed system achieves high-fidelity magnetic localization of microscale objects, paving the way for advanced applications.

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Area of Science:

  • Quantum Sensing
  • Nanophotonics
  • Materials Science

Background:

  • Nitrogen-vacancy (NV) centers are versatile solid-state quantum sensors.
  • Simultaneous use of multiple NV sensors enhances probing of complex fields and dynamics.
  • Current methods often lack scalability and simultaneous, distinct readout.

Purpose of the Study:

  • To develop a scalable architecture for multi-NV sensor operation.
  • To demonstrate high-fidelity microscale magnetic localization using NV-ensemble sensors.
  • To explore applications in dynamic tracking and magnetic field reconstruction.

Main Methods:

  • Integration of NV-ensembles with silicon-nitride photonic integrated circuits.
  • Development of a fiber-addressed, guided-wave, multi-channel architecture.
  • Utilizing machine learning for multi-point magnetic field reconstruction.
  • Simultaneous, distinct readout of eight localized NV-ensemble sensors.

Main Results:

  • Achieved scalable operation of eight localized NV-ensemble sensors in an array.
  • Demonstrated microscale magnetic localization of a 30 μm needle tip with sub-dimension error.
  • Successfully tracked the needle tip dynamically with high fidelity.
  • Quantified operating bounds for translation and rotation tracking via simulations.

Conclusions:

  • The developed fiber-addressed, multi-channel architecture enables scalable NV-based magnetic localization.
  • This approach offers a pathway towards magnetic sensing in optically inaccessible environments.
  • The system provides simultaneous, distinct readout for advanced spatiotemporal correlation studies.