[19a-F206-1~12] 6.2 Carbon-based thin films

△ [19a-F206-5] NMR measurements using shallow NV centers in the nitrogen-terminated diamond

〇(B)Takahiro Sonoda¹, Sora Kawai¹, Hayate Yamano¹, Kanami Kato¹, Jorge Buendia¹, Taisuke Kageura¹, Yu Ishii¹, Ryosuke Fukuda¹, Takuma Okada¹, Moriyoshi Haruyama^2,3, Takashi Tanii¹, Keisuke Yamada², Shinobu Onoda², Wataru Kada³, Osamu Hanaizumi³, Alastair Stacey⁴, Tokuyuki Teraji⁵, Shozo Kono⁷, Junichi Isoya⁶, Hiroshi Kawarada^1,7 (1.Waseda Univ., 2.QST, 3.Gunma Univ., 4.Melbourne Univ., 5.NIMS, 6.Univ. of Tsukuba, 7.ZAIKEN)

Keywords:diamond, nitrogen-vacancy center, quantum sensing

For the application of NV centers in diamond to nanoscale NMR, establishing a method to stabilize the negative charge state of shallow NV centers has become an issue. We have already formed nitrogen-terminated surface by nitrogen radical exposure, and demonstrated that the negative charge state of the shallow NV centers stabilizes and that the coherence time T₂ is comparable to T₂ under oxygen termination. In this research, we successfully detected ¹H nuclear spin signal on the substrate surface using a shallow NV center in the nitrogen-terminated diamond.