Mariani Giacomo, Nomoto Shuhei, Kashiwaya Satoshi, Nomura Shintaro
Division of Physics, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, 305-8571, Japan.
Department of Applied Physics, Nagoya University, Chikusa-Ku, Nagoya, 464-8571, Japan.
Sci Rep. 2020 Mar 16;10(1):4813. doi: 10.1038/s41598-020-61669-w.
Nitrogen-vacancy (NV) centers in diamond have been used as platforms for quantum information, magnetometry and imaging of microwave (MW) fields. The spatial distribution of the MW fields used to drive the electron spin of NV centers plays a key role for these applications. Here, we report a system for the control and characterization of MW magnetic fields used for the NV spin manipulation. The control of the MW field in the vicinity of a diamond surface is mediated by an exchangeable lumped resonator, coupled inductively to a MW planar ring antenna. The characterization of the MW fields in the near-field is performed by an FFT imaging of Rabi oscillations, by using an ensemble of NV centers. We have found that the Rabi frequency over a lumped resonator is enhanced 22 times compared to the Rabi frequency without the presence of the lumped resonator. Our system may find applications in quantum information and magnetometry where a precise and controlled spin manipulation is required, showing NV centers as good candidates for imaging MW fields and characterization of MW devices.
金刚石中的氮空位（NV）中心已被用作量子信息、磁力测量和微波（MW）场成像的平台。用于驱动NV中心电子自旋的MW场的空间分布对这些应用起着关键作用。在此，我们报告了一种用于控制和表征用于NV自旋操纵的MW磁场的系统。金刚石表面附近MW场的控制由一个可交换的集总谐振器介导，该谐振器通过电感耦合到一个MW平面环形天线。近场MW场的表征通过使用NV中心系综对拉比振荡进行快速傅里叶变换（FFT）成像来完成。我们发现，与不存在集总谐振器时相比，集总谐振器上的拉比频率提高了22倍。我们的系统可能在需要精确和可控自旋操纵的量子信息和磁力测量中找到应用，表明NV中心是成像MW场和表征MW器件的良好候选者。
