Magnetic field imaging by hBN quantum sensor nanoarray
- URL: http://arxiv.org/abs/2301.12645v2
- Date: Fri, 16 Jun 2023 16:48:01 GMT
- Title: Magnetic field imaging by hBN quantum sensor nanoarray
- Authors: Kento Sasaki, Yuki Nakamura, Hao Gu, Moeta Tsukamoto, Shu Nakaharai,
Takuya Iwasaki, Kenji Watanabe, Takashi Taniguchi, Shinichi Ogawa, Yukinori
Morita, Kensuke Kobayashi
- Abstract summary: We demonstrate high-spatial-resolution magnetic field imaging with a boron vacancy (V$_textB-$) defects array in hexagonal boron nitride with a few 10 nm thickness.
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.
- Score: 1.559812637550576
- License: http://creativecommons.org/licenses/by/4.0/
- 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.
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