All-optical low-field magnetometry of superconductors using NV nanodiamonds

Measurement 2026 Open access

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Authors: Omkar Dhungel, Saravanan Sengottuvel, Mariusz Mrózek, T. Lenz, Nir Bar‐Gill, Adam M. Wojciechowski, Arne Wickenbrock, Dmitry Budker
DOI: 10.1016/j.measurement.2026.122080
Cited by: 1
References: 39

Abstract

We report a microwave-free, all-optical sensing approach for characterization of superconducting materials using nitrogen-vacancy (NV) centers in nanodiamonds. By implementing near-zero-field cross-relaxation magnetometry within a custom-built widefield fluorescence microscope integrated with a lock-in amplifier, we measured critical superconducting parameters including transition temperature and penetration fields by depositing nanodiamonds on a 200 nm YBa 2 Cu 3 O 7 − δ thin film. This minimally invasive, all-optical approach provides a general platform for measuring local magnetic responses in superconducting materials without the perturbative effects of traditional microwave-based sensing.

Fields of Study & Subjects

Diamond and Carbon-based Materials Research Advanced Fiber Laser Technologies Mechanical and Optical Resonators

Publication details

Journal / source
Measurement
Publisher
Elsevier BV
Volume
283
Pages
122080–122080
Publication date
6 June 2026
Language
EN