Presentation Information
[24p-1BB-5][The 55th Young Scientist Presentation Award Speech] Developing a sensitive diamond quantum sensor system for detecting the brain magnetic field of a living rat
〇Atsumi Yoshimura1, Naota Sekiguchi1, Motofumi Fushimi2, Yuta Kainuma1, Chikara Shinei3, Masashi Miyakawa3, Takashi Taniguchi3, Tokuyuki Teraji3, Shinobu Onoda4, Takeshi Ohshima4, Masaki Sekino2, Takayuki Iwasaki1, Mutsuko Hatano1 (1.Tokyo Tech., 2.Univ. of Tokyo, 3.NIMS, 4.QST)
Keywords:
NV center,quantum sensor,magnetoencephalography
Diamond quantum sensors have been actively studied for applications in biomagnetic field measurements such as brain magnetic fields. We developed a diamond quantum sensor that can be placed close to the head of a living rat. We reduced the laser intensity noise by balance detection and obtained a magnetic field sensitivity of 13 pT Hz-1/2 in the bandwidth of the brain magnetic field. If the field’s strength is 1 to 10 pT, this sensor is expected to detect an evoked field. We are working on biometric measurements.