[12a-S301-1~11] 6.2 Carbon-based thin films

[12a-S301-11] Generation of spin defects in h-BN and measurements of their optical properties

〇Tetta Suzuki^1,2, Yuichi Yamazaki², Takashi Taniguchi³, Kenji Watanabe³, Yuichiro Matsushita⁴, Kazuya Harii², Shiro Entani², Yuta Masuyama², Yasuto Hijikata¹, Takeshi Ohshima² (1.Saitama-Univ, 2.QST, 3.NIMS, 4.Tokyo Tech)

Keywords:hexagonal boron nitride, boron vacancy, ODMR

We generated boron vacancy (V_B) center in hexagonal boron nitride (h-BN) which acts as spin defect and measured their optical properties. V_B was generated in thin h-BN flake by 40keV-N₂ ion irradiation (fluence : 1×10¹⁴~10¹⁷cm^-2).This exhibited photoluminescence (PL) emission at 700~900nm under 532nm laser excitation. We performed optically detected magnetic resonance (ODMR) measurements to demonstrate quantum sensing of magnetic field. As a result, we confirmed two ODMR signals centered 3.46GHz split with increasing magnetic fields.