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

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8p-C310-8] Development of Diamond Quantum Magnetic Sensor Using Polarrization Dependance of Infrared Absorption

〇Mikito Bunno¹, 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,Infrared absorption

Conventional fluorescence-based diamond quantum magnetic sensors using nitrogen-vacancy (NV) centers face challenges in miniaturization due to the constraints of their light collection systems. In this study, we propose a magnetic field measurement method that detects the polarization rotation of transmitted light, utilizing infrared absorption in the metastable singlet state and linear dichroism. This approach eliminates the need for a large light collection system, making it highly promising for sensor miniaturization. Experimental results demonstrate that this method effectively reduces laser intensity noise, achieving a magnetic sensitivity of 81 pT Hz^-¹^/², which approaches the optical shot-noise limit.