[24p-1BB-1~16] KS.1 Solid State Quantum Sensor Group

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)

[24p-1BB-10] Material Properties of Diamond and Their Effects on the DC Field Sensitivity for NV-Ensemble Magnetometer

〇Takeharu Sekiguchi¹, Takashi Taniguchi³, Masashi Miyakawa³, Chikara Shinei³, Hiroyuki Abe², Shinobu Onoda², Seiichi Saiki², Shuya Ishii², Tokuyuki Teraji³, Takeshi Ohshima², Takayuki Iwasaki¹, Mutsuko Hatano^1,2 (1.Tokyo Tech, 2.QST, 3.NIMS)

Keywords:

quantum sensor,NV center,diamond

We study the material properties of diamnd and their effects on the static magnetic field sensitivity of quantum sensor based on a large ensemble of NV centers. The experimental methods to measure the spin dephasing time T2* and NV concentration are given with experimental results, as well as achieved values of sensitivity with improved diamond samples. We will discuss the relationship between such material parameters and the magnetic sensitivity, as well as our direction to achieve higher sensitivity.