Abstract

Quantum sensing with solid-state spin defects has transformed nanoscale metrology, offering sub-wavelength spatial resolution with exceptional sensitivity to multiple signal types. This work presents a comprehensive experimental framework to probe a 2D spin ensemble in hexagonal boron nitride, mapping hyperfine interactions with proximal nuclear spins, demonstrating switchable magnetic and electric noise sensing, and reconstructing the environmental noise spectrum while accounting for control imperfections. The authors report a coherence time of 80 µs under dynamical decoupling and sub-microtesla AC magnetic sensitivity at a 10 nm target distance.

Abstract

Quantum sensing with solid-state spin defects has transformed nanoscale metrology, offering sub-wavelength spatial resolution with exceptional sensitivity to multiple signal types. This work presents a comprehensive experimental framework to probe a 2D spin ensemble in hexagonal boron nitride, mapping hyperfine interactions with proximal nuclear spins, demonstrating switchable magnetic and electric noise sensing, and reconstructing the environmental noise spectrum while accounting for control imperfections. The authors report a coherence time of 80 µs under dynamical decoupling and sub-microtesla AC magnetic sensitivity at a 10 nm target distance.

Abstract

Quantum sensing with solid-state spin defects has transformed nanoscale metrology, offering sub-wavelength spatial resolution with exceptional sensitivity to multiple signal types. This work presents a comprehensive experimental framework to probe a 2D spin ensemble in hexagonal boron nitride, mapping hyperfine interactions with proximal nuclear spins, demonstrating switchable magnetic and electric noise sensing, and reconstructing the environmental noise spectrum while accounting for control imperfections. The authors report a coherence time of 80 µs under dynamical decoupling and sub-microtesla AC magnetic sensitivity at a 10 nm target distance.

Abstract

Quantum sensing with solid-state spin defects has transformed nanoscale metrology, offering sub-wavelength spatial resolution with exceptional sensitivity to multiple signal types. This work presents a comprehensive experimental framework to probe a 2D spin ensemble in hexagonal boron nitride, mapping hyperfine interactions with proximal nuclear spins, demonstrating switchable magnetic and electric noise sensing, and reconstructing the environmental noise spectrum while accounting for control imperfections. The authors report a coherence time of 80 µs under dynamical decoupling and sub-microtesla AC magnetic sensitivity at a 10 nm target distance.