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Updated: Aug 6, 2026
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Development of a modular optically detected magnetic resonance setup for optical experiments in a variable
Anh Tong1,2,3, Andreas Bauer1,2, Markus Kleinhans1
1Physik Department, TUM School of Natural Sciences, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany.
The Review of Scientific Instruments
|July 20, 2026
Summary
We created a new optical setup for magnetic resonance using nitrogen-vacancy (NV) centers. This system works with standard cryostats, enabling sensitive measurements in challenging low-temperature environments.
Area of Science:
- Quantum Sensing
- Materials Science
- Cryogenics
Background:
- Nitrogen-vacancy (NV) centers are promising quantum sensors.
- Integrating NV centers with cryogenic systems for magnetic measurements presents challenges.
- Existing setups may require significant modifications for cryostat compatibility.
Purpose of the Study:
- To develop an optically detected magnetic resonance setup compatible with commercial helium bath cryostats.
- To enable NV center excitation and fluorescence detection from outside the cryostat.
- To demonstrate NV magnetometry in constrained cryogenic environments.
Main Methods:
- Designed an optical path extending nearly 2m to span the cryostat insert.
- Ensured preservation of optical alignment and beam quality over the extended path.
- Integrated the setup with a helium bath cryostat and variable temperature insert.
Main Results:
- Successfully demonstrated excitation and fluorescence detection of NV centers from outside the cryostat.
- Measured temperature dependence of the resonance signal and behavior under applied magnetic fields.
- Observed the magnetic transition of a SrRuO3 sample using NV magnetometry.
Conclusions:
- The developed setup is compatible with existing cryogenic systems without major modifications.
- NV magnetometry is feasible for samples in constrained cryogenic environments.
- The setup facilitates advanced quantum sensing applications at low temperatures.
