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“Quantum Sensing System for Large Detection Volume with Ensemble Nitrogen-Vacancy Centers

雄太 増山, Y. MASUYAMA, 勇斗 小澤, Hayato Ozawa, 孝之 岩崎, Takayuki Iwasaki, 睦子 波多野, Mutsuko Hatano, Mutsuko Hatano

Published Nov 1, 2017• 0 citations
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For quantum sensing based on nitrogen-vacancy (NV) centers in diamond, microwave irradiation with uniform power density and large detection volume is necessary to achieve ultrahigh sensitivity. We demonstrate the fabrication of a double magnetic ring stereoscopic antenna used for the tridimensional uniform control of NV spin ensembles with a 4π mm 2 × 2 mm large volume. Compared with those of traditional microwave antennas (copper wire and single-loop antenna), the sensitivity of the sensor can be improved 4.93 and 9.98 times, and the linearity of the lock-in signal can be increased by 2.04 and 1.11%, respectively. Moreover, the proposed antenna can suppress the thermal noise generated by itself and is amenable to three-dimensional (3D) integration.
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