[8p-Z05-1~20] 6.2 Carbon-based thin films

[8p-Z05-18] Sensitivity of the diamond quantum sensor in the simultaneous multiple operation point measurement

〇Yuji Hatano¹, Daisuke Nishitani¹, Yuta Masuyama², Shinobu Onoda², Takeshi Ohshima², Keigo Arai¹, Takayuki Iwasaki¹, Mutsuko Hatano^1,2 (1.Tokyo Inst. Tech., 2.QST)

Keywords:NV center, diamond, quantum sensor

Diamond quantum sensor based on the NV center in the diamond crystal was used to construct the two-point locked system enabling the simultaneous measurement of the magnetic field and the temperature without magnetic shield. The diamond sensor was the Ib HPHT crystal with 10¹⁸ cm^-2 EB dose, which was adhered to the end of the optical fiber. Microwave frequencies were locked to the paired two resonance points in the ODMR spectrum. Measured sensitivity was 17~19 nT/√Hz at the light power of 190 mW.