Improved quantum sensing with a single solid-state spin via spin-to-charge conversion

Abstract

Efficient optical readout of a single, solid-state electronic spin at room temperature is a key challenge for nanoscale quantum sensing. Here we apply the technique of spin-to-charge conversion to enhance the optical spin-state readout of a single Nitrogen-Vacancy (NV) color center in room temperature diamond, with no degradation in the NV spin coherence time. We demonstrate an order-of-magnitude improvement in spin readout noise per shot and about a factor of five improvement in AC magnetometry sensitivity, compared to the conventional NV spin-state optical readout method. This improvement is realized in a widely-applicable bulk diamond system. We show that selecting for successful charge state initialization leads to possible further improvement in sensitivity. This technique is well suited to sensing applications involving low duty cycle pulsed signals, e.g., in biomagnetometry, where long deadtimes demand optimized sensitivity per shot.

11 pages

References in corpus (12)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Sub-millihertz magnetic spectroscopy with a nanoscale quantum sensor
• Magnetic field imaging with NV ensembles
• Quantum sensing with arbitrary frequency resolution
• High sensitivity magnetic imaging using an array of spins in diamond
• Nanoscale NMR Spectroscopy and Imaging of Multiple Nuclear Species
• Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond
• Efficient readout of a single spin state in diamond via spin-to-charge conversion
• Three megahertz photon collection rate from an NV center with millisecond spin coherence
• Nanoscale electrical conductivity imaging using a nitrogen-vacancy center in diamond
• Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles

Cited by in corpus (11)

• Sensitivity Optimization for NV-Diamond Magnetometry
• Spin Readout Techniques of the Nitrogen-Vacancy Center in Diamond
• Single-molecule Scale Magnetic Resonance Spectroscopy using Nitrogen-Vacancy Centers in Diamond
• Cavity quantum electrodynamic readout of a solid-state spin sensor
• High-fidelity single-shot readout of single electron spin in diamond with spin-to-charge conversion
• Dissipative superradiant spin amplifier for enhanced quantum sensing
• Qubit guidelines for solid-state spin defects
• Enhancement of spin-to-charge conversion of diamond NV centers at ambient conditions using surface electrodes
• Wavelet-based Ramsey magnetometry enhancement of a single NV center in diamond
• Sequential Bayesian experiment design for adaptive Ramsey sequence measurements
• Real-Time Charge Initialization of Diamond Nitrogen-Vacancy Centers for Enhanced Spin Readout