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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Magnetic field imaging by hBN quantum sensor nanoarray
(Submitted on 30 Jan 2023 (v1), last revised 16 Jun 2023 (this version, v2))
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.
Submission history
From: Kento Sasaki [view email][v1] Mon, 30 Jan 2023 03:54:19 GMT (744kb)
[v2] Fri, 16 Jun 2023 16:48:01 GMT (751kb)
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