论文标题
扫描氮 - 磁化磁力测定标准降低至350MK
Scanning nitrogen-vacancy magnetometry down to 350mK
论文作者
论文摘要
我们报告了在干稀释冰箱中实施扫描氮胶合（NV）磁力计的。使用脉冲的光学检测到的磁共振结合通过共平面波导结合有效的微波递送，我们达到350 MK的基本温度，受实验热负荷和探针的热限制的限制。我们通过在50 nm-薄的铝微结构中成像超导涡流来证明NV磁力测定法。我们测量的灵敏度约为每平方根Hz的3μt。我们的工作证明了在亚克尔文温度下使用扫描NV中心进行非侵入性磁场成像的可行性。
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 μT per square root Hz. Our work demonstrates the feasibility for performing non-invasive magnetic field imaging with scanning NV centers at sub-Kelvin temperatures.
