Placing a sensor close to the target at the nano-level is a central challenge in quantum sensing. We demonstrate magnetic field imaging with a boron vacancy ( ) defects array in hexagonal boron nitride with a few 10 nm thickness. sensor spots with a size of (100 nm)2 are arranged periodically with nanoscale accuracy 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 straight micro wire with a high spatial resolution. Each sensor exhibits a practical sensitivity of , suitable for quantum materials research. Our technique of arranging quantum sensors periodically and tightly on measurement targets will maximize their potential.
Magnetic field imaging by hBN quantum sensor nanoarray
Kento Sasaki, Yuki Nakamura, Hao Gu, Moeta Tsukamoto, Shu Nakaharai, Takuya Iwasaki, Kenji Watanabe, Takashi Taniguchi, Shinichi Ogawa, Yukinori Morita, Kensuke Kobayashi; Magnetic field imaging by hBN quantum sensor nanoarray. Appl. Phys. Lett. 5 June 2023; 122 (24): 244003. https://doi.org/10.1063/5.0147072
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