期刊
APPLIED PHYSICS LETTERS
卷 120, 期 22, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0093548
关键词
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资金
- European Research Council [ERC CoG 817720]
- Swiss National Science Foundation (SNSF) [200020-175600]
- NCCR QSIT
- National Centre of Competence in Research in Quantum Science and Technology [51NF40-185902]
- Advancing Science and Technology through dIamond Quantum Sensing (ASTERIQS) program [820394]
In this paper, we present the implementation of a scanning nitrogen-vacancy (NV) magnetometer in a dry dilution refrigerator. By utilizing pulsed optically detected magnetic resonance and efficient microwave delivery through a co-planar waveguide, we successfully achieved magnetic field imaging of superconducting vortices at sub-Kelvin temperatures with high sensitivity.
We report on the implementation of a scanning nitrogen-vacancy (NV) magnetometer in a dry dilution refrigerator. Using pulsed optically detected magnetic resonance combined with efficient microwave delivery through a co-planar waveguide, we reach a base temperature of 350 mK, limited by experimental heat load and thermalization of the probe. We demonstrate scanning NV magnetometry by imaging superconducting vortices in a 50-nm-thin aluminum microstructure. The sensitivity of our measurements is approximately 3 mu T per square root Hz. Our work demonstrates the feasibility for performing noninvasive magnetic field imaging with scanning NV centers at sub-Kelvin temperatures. (C) 2022 Author(s).
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