Magnetic field imaging by hBN quantum sensor nanoarray

Abstract

Placing a sensor close to the target at the nano-level is a central challenge in quantum sensing. We demonstrate high-spatial-resolution magnetic field imaging with a boron vacancy (V${}_{\text{B}}^{-}$) defects array in hexagonal boron nitride with a few 10 nm thickness. V${}_{\text{B}}^{-}$ sensor spots with a size of (100 nm)${}^2$ are arranged periodically with nanoscale precision using a helium ion microscope and attached tightly to a gold wire. The sensor array allows us to visualize the magnetic field induced by the current in the wire with a spatial resolution beyond the diffraction limit. Each sensor exhibits a practical sensitivity of $73.6\mu {\text{T/Hz}}^{0.5}$, suitable for quantum materials research. Our technique of arranging V${}_{\text{B}}^{-}$ quantum sensors periodically and tightly on measurement targets will maximize their potential.

6 pages, 4 figures

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Cited by in corpus (9)

• Quantum sensing and imaging with spin defects in hexagonal boron nitride
• Quantum Optics Applications of Hexagonal Boron Nitride Defects
• Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
• Photonics in Flatland: Challenges and Opportunities for Nanophotonics with 2D Semiconductors
• Nitrogen isotope effects on boron vacancy quantum sensors in hexagonal boron nitride
• Quantifying the creation of negatively charged boron vacancies in He-ion irradiated hexagonal boron nitride
• Systematic characterization of nanoscale $h$-BN quantum sensor spots created by helium-ion microscopy
• Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride
• All-optical magnetic imaging with spin defects in van der Waals materials at Angstrom-scale