Extending coherence time of macro-scale diamond magnetometer by dynamical decoupling with coplanar waveguide resonator
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-12-01 |
| Journal | Review of Scientific Instruments |
| Authors | Y. MASUYAMA, Kosuke Mizuno, Hayato Ozawa, Hitoshi Ishiwata, Yuji Hatano |
| Institutions | The University of Osaka, National Institutes for Quantum Science and Technology |
| Citations | 31 |
Abstract
Section titled āAbstractāUltimate sensitivity for quantum magnetometry using nitrogen-vacancy (NV) centers in a diamond is limited by a number of NV centers and coherence time. Microwave irradiation with a high and homogeneous power density for a large detection volume is necessary to achieve a highly sensitive magnetometer. Here, we demonstrate a microwave resonator to enhance the power density of the microwave field and an optical system with a detection volume of 1.4 Ć 10ā3 mm3. The strong microwave field enables us to achieve 48 ns Rabi oscillation which is sufficiently faster than the phase relaxation time of NV centers. This system combined with a decoupling pulse sequence, XY16, extends the spin coherence time (T2) up to 27 times longer than that with a spin echo method. Consequently, we obtained an AC magnetic field sensitivity of 10.8 pt/Hz using the dynamical decoupling pulse sequence.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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