[8p-C310-1~13] KS.1 Solid State Quantum Sensor Group

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8p-C310-10] Development of Diamond Quantum Sensor Module with Bias-Free Magnetometry

〇Ayumi Kanamoto¹, Shoichi Mizuta¹, Naota Sekiguchi¹, Chikara Shinei^2,3, Masashi Miyakawa³, Takashi Taniguchi³, Tokuyuki Teraji³, Hiroshi Abe⁴, Shinobu Onoda⁴, Takeshi Ohshima^4,5, Mutsuko Hatano¹, Takayuki Iwasaki¹ (1.Science Tokyo, 2.Univ. of Tsukuba, 3.NIMS, 4.QST, 5.Tohoku Univ.)

Keywords:

Quantum Sensing,NV Center

Diamond quantum sensors are promising for biomagnetic field measurements. In this study, we developed a fiber-coupled sensor module employing Bias-Free Magnetometry (BFM), which utilizes a modulation magnetic field under shielded conditions. Compared with conventional bias-field-based methods, BFM suppresses the effects of temperature fluctuations and magnetic field inhomogeneity while enabling a more compact sensor design. An elliptical light-collection system was implemented to improve fluorescence collection efficiency, achieving a photon shot-noise limit of 16 pT Hz^-1/2.