Nitrogen-Vacancy Ensemble Magnetometry Based on Pump Absorption

Abstract

We demonstrate magnetic field sensing using an ensemble of nitrogen-vacancy centers by recording the variation in the pump-light absorption due to the spin-polarization dependence of the total ground state population. Using a 532 nm pump laser, we measure the absorption of native nitrogen-vacancy centers in a chemical vapor deposited diamond placed in a resonant optical cavity. For a laser pump power of 0.4 W and a cavity finesse of 45, we obtain a noise floor of $\sim$ 100 nT/$\sqrt{\text{Hz}}$ spanning a bandwidth up to 125 Hz. We project a photon shot-noise-limited sensitivity of $\sim$ 1 pT/$\sqrt{\text{Hz}}$ by optimizing the nitrogen-vacancy concentration and the detection method.

7 pages and 5 figures

References in corpus (24)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Nanometer scale quantum thermometry in a living cell
• Sensing electric fields using single diamond spins
• Magnetometry with nitrogen-vacancy defects in diamond
• High precision nano scale temperature sensing using single defects in diamond
• Optical magnetic detection of single-neuron action potentials using quantum defects in diamond
• A subpicotesla diamond magnetometer
• Magnetic spin imaging under ambient conditions with sub-cellular resolution
• Broadband Magnetometry and Temperature Sensing with a Light Trapping Diamond Waveguide
• Strongly enhanced photon collection from diamond defect centres under micro-fabricated integrated solid immersion lenses
• Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond
• Optical properties of the nitrogen-vacancy singlet levels in diamond
• Efficient photon detection from color centers in a diamond optical waveguide
• Robust control of individual nuclear spins in diamond
• Nano-engineered Diamond Waveguide as a Robust Bright Platform for Nanomagnetometry Using Shallow Nitrogen Vacancy Centers
• Light narrowing of magnetic resonances in ensembles of nitrogen-vacancy centers in diamond
• Cavity-enhanced room-temperature magnetometry using absorption by nitrogen-vacancy centers in diamond
• Microwave-free magnetometry with nitrogen-vacancy centers in diamond
• Miniature cavity-enhanced diamond magnetometer
• Optimised frequency modulation for continuous-wave optical magnetic resonance sensing using nitrogen-vacancy ensembles
• A low-loss, broadband antenna for efficient photon collection from a coherent spin in diamond
• Measuring nanoscale magnetic write head fields using a hybrid quantum register
• Pump-Enhanced Continuous-Wave Magnetometry using Nitrogen-Vacancy Ensembles
• Increasing the photon collection rate from a single NV center with a silver mirror

Cited by in corpus (7)

• Sensitivity Optimization for NV-Diamond Magnetometry
• Diamond quantum thermometry: From foundations to applications
• Optimisation of a diamond nitrogen vacancy centre magnetometer for sensing of biological signals
• Infrared laser magnetometry with a NV doped diamond intracavity etalon
• Laser threshold magnetometry using green light absorption by diamond nitrogen vacancies in an external cavity laser
• Diamond Nitrogen-Vacancy Center Magnetometry: Advances and Challenges
• Sensitivity-enhanced magnetometry using nitrogen-vacancy ensembles via adaptively complete transitions overlapping