Highly sensitive macro-scale diamond magnetometer operated by dynamical decoupling sequence with coplanar waveguide resonator

Abstract

Ultimate sensitivity for quantum magnetometry using nitrogen-vacancy (NV) centers in diamond is limited by 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 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 1.4e-3 mm${}^3$. 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${}^{1/2}$ using the dynamical decoupling pulse sequence.

References in corpus (11)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Magnetometry with nitrogen-vacancy defects in diamond
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Optical magnetic detection of single-neuron action potentials using quantum defects in diamond
• High nitrogen-vacancy density diamonds for magnetometry applications
• A subpicotesla diamond magnetometer
• Robust dynamical decoupling
• Single-spin magnetometry with multi-pulse sensing sequences
• Efficient photon detection from color centers in a diamond optical waveguide
• Perfectly Aligned Shallow Ensemble Nitrogen-Vacancy Centers in (111) Diamond
• Polarization- and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond

Cited by in corpus (9)

• Optimisation of a diamond nitrogen vacancy centre magnetometer for sensing of biological signals
• Nuclear quadrupole resonance spectroscopy with a femtotesla diamond magnetometer
• Simultaneous Wide-field Imaging of Phase and Magnitude of AC Magnetic Signal Using Diamond Quantum Magnetometry
• Construction and operation of a tabletop system for nanoscale magnetometry with single nitrogen-vacancy centers in diamond
• Diamond Nitrogen-Vacancy Center Magnetometry: Advances and Challenges
• Quantum Error Mitigation via Quantum-Noise-Effect Circuit Groups
• Nuclear Spin Metrology with Nitrogen Vacancy Center in Diamond for Axion Dark Matter Detection
• Coupling spin defects in hexagonal boron nitride to a microwave cavity
• Long Rayleigh length confocal microscope: A fast evaluation tool for obtaining quantum properties of color centers