1 College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; 2 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; 3 School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; 4 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
Abstract A tightly linked dual ring antenna is designed, and it is specifically tailored for uniformly coupling the microwave magnetic field to the nitrogen-vacancy (NV) center. The designed antenna operates at a center frequency of about 2.87 GHz, with a bandwidth of around 200 MHz, allowing it to address multiple resonance peaks in the optically detected magnetic resonance (ODMR) spectrum in an external magnetic field. Moreover, the antenna generates a fairly uniform magnetic field in a range with a radius of 0.75 mm. High resolution imaging of the magnetic field distribution on the surface of the antenna is conducted by using a fiber diamond probe. We also investigate the effect of magnetic field uniformity on the linewidth of ODMR, so as to provide insights into reducing the inhomogeneous broadening of ODMR.
(Decoherence; open systems; quantum statistical methods)
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2021YFB2012600) and the Shanghai Aerospace Science and Technology Innovation Fund (Grant No. SAST-2022-102).
Corresponding Authors:
Guan-Xiang Du
E-mail: duguanxiang@njupt.edu.cn
Cite this article:
Qing-Yun Ye(叶青云), Ya-Wen Xue(薛雅文), Fei-Yue He(何飞越), Xu-Tong Zhao(赵旭彤), Yu-Chen Bian(卞雨辰), Wen-Tao Lu(卢文韬), Jin-Xu Wang(王金旭), Hong-Hao Chen(陈鸿浩), Sheng-Kai Xia(夏圣开), Ming-Jing Zeng(曾明菁), and Guan-Xiang Du(杜关祥) Design of tightly linked dual ring antenna and imaging of magnetic field distribution using a diamond fiber probe 2024 Chin. Phys. B 33 024202
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