[14p-D221-1~16] 6.2 Carbon-based thin films

△ [14p-D221-2] Stability and spin coherence properties of NV center near diamond surface

〇Akira Watanabe¹, Tetsuri Nishikawa¹, Hiromitsu Kato², Toshiharu Makino², Satoshi Yamasaki², Ernst David Herbschleb¹, Norikazu Mizuochi¹ (1.Kyoto Univ., 2.AIST)

Keywords:diamond, magnetic sensor, NV center

The purpose of this study is to improve the sensitivity of a magnetic sensor using a single NV in n-type diamond. I measured the coherence time (T₂) of a single NV center near the surface in phosphorus-doped n-type diamond using the Hahn Echo method. I also compared the NV with T₂ of a single NV center fabricated under the same conditions in diamond without phosphorus doping. In this presentation, I report on the preparation method of each sample and the measurement results of T₂.