[23p-A202-1~16] 6.2 Carbon-based thin films

△ [23p-A202-4] Spin Characterization of NV Ensembles on Ultra High-Concentration Nitrogen-doped CVD Diamonds

〇Yudai Asano¹, Ueda Mayu¹, Hayasaka kyosuke¹, Kanehisa Kyotaro¹, Kageura Taisuke^1,3, Tanii Takashi¹, Onoda Shinobu², Enomoto Shinpei⁴, Kono Shozo⁴, Kawarada Hiroshi^1,4 (1.Waseda Univ., 2.QST, 3.NIMS, 4.ZAIKEN)

Keywords:diamond, NV center

NV ensembles in diamond are expected to have applications in magnetic sensing. In this study, highly nitrogen-doped diamond was prepared by CVD processes, and a nitrogen concentration of 8×10²⁰ cm^-3 was obtained. In addition, high-density NV ensembles were fabricated by electron irradiation using a transmission electron microscope, and their spin properties were investigated. The fabricated sample yielded an NV center density comparable to that of HPHT diamond, with a T₂ of about 0.5 μs. The T₂ was about 0.5 μs, which is a very high value considering the density.