The Japan Society of Applied Physics

2023 International Conference on Solid State Devices and Materials

2023 International Conference on Solid State Devices and Materials

Sep 5, 2023 - Oct 31, 2023
Nagoya Congress Center

5:15 PM - 5:30 PM

[B-2-05] The high concentration NV ensembles formed from heavily nitrogen-doped CVD diamond with high quality

○Yudai Asano1, Kyosuke Hayasaka1, Mayu Ueda1, Kosuke Kimura2,3, Takashi Tanii1, Shinobu Onoda2, Shinpei Enomoto4, Hiroshi Kawarada1,4 (1. Waseda Univ. (Japan), 2. National Inst. of Quantum and Radiological Sci. and Tech. (Japan), 3. Gunma Univ. (Japan), 4. Kagami Memorial Res. Inst. for Materials Sci. and Tech. (Japan))

https://doi.org/10.7567/SSDM.2023.B-2-05

In this study, the NV density was evaluated from the dipolar interaction strength of NV in heavily nitrogen doped CVD diamond with the world's highest nitrogen concentration ([N]=8.0×1020[cm-3]). The diamond was irradiated by focused electron beam of 300keV to form dense vacancies equivalent to nitrogen density in the CVD diamond. In this study, As a result, we have obtained the highest NV density ensemble in the world on CVD diamonds (8.5x1018 cm-3) and HPHT diamonds (1.1x1019 cm-3). The NV’s high concentration is necessary breakthrough experimental for improving magnetic sensitivity.