[16p-A408-1~18] 6.2 Carbon-based thin films

△ [16p-A408-8] Extension of spin coherence time of NV centers in diamonds by suppressing impurities

〇(M2)Riku Kawase¹, Hiroyuki Kawashima¹, Hiromitsu Kato², Norio Tokuda³, Satoshi Yamasaki³, Masahiko Ogura², Toshiharu Makino², Norikazu Mizuochi^1,4 (1.Kyoto Univ., 2.AIST, 3.Kanazawa Univ., 4.CSRN)

Keywords:diamond, NV center, CVD

NV center in diamond is expected to use for high-sensitive quantum sensor which is available at room-temperature because it shows the longest spin coherence time (T₂) among solid system at room temperature. In the recent chemical vapor deposition research, we found a diamond synthesis method for impurity suppression which is important for T₂ expansion, and we obtained T₂ comparable to the reported longest value at room-temperature. In the presentation, we will report the method for impurity suppression and NV properties for sensitivity of quantum sensor.