Large-area, tridimensional uniform microwave antenna for quantum sensing based on nitrogen-vacancy centers in diamond

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...

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Bibliographic Details
Published in:Applied physics express 2018-12, Vol.11 (12), p.123001
Main Authors: Chen, Yulei, Guo, Hao, Li, Wangwang, Wu, Dajin, Zhu, Qiang, Zhao, Binbin, Wang, Lei, Zhang, Yang, Zhao, Rui, Liu, Wenyao, Du, Fangfang, Tang, Jun, Liu, Jun
Format: Article
Language:English
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Summary: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 mm2 × 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.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.11.123001