1. Magnetic field imaging by hBN quantum sensor nanoarray
- Author
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Sasaki, Kento, Nakamura, Yuki, Gu, Hao, Tsukamoto, Moeta, Nakaharai, Shu, Iwasaki, Takuya, Watanabe, Kenji, Taniguchi, Takashi, Ogawa, Shinichi, Morita, Yukinori, and Kobayashi, Kensuke
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Applied Physics ,Quantum Physics - 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., Comment: 6 pages, 4 figures
- Published
- 2023
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