Diamond nitrogen-vacancy centres spin-state-based quantum sensor using a compact broadband antenna

Mingming Cui; Fazhong Shen; Yingying Qiao; Guanxiang Du; Xiang Zhuo; Jiawei Zang; Zhenyuan Zhang; Yi Wang; Lei Li; Yang Gao

doi:10.1049/ell2.12649

Diamond nitrogen-vacancy centres spin-state-based quantum sensor using a compact broadband antenna

Mingming Cui, Fazhong Shen, Yingying Qiao, Guanxiang Du, Xiang Zhuo, Jiawei Zang, Zhenyuan Zhang, Yi Wang, Lei Li^*, Yang Gao^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper presents a compact broadband antenna that is used in the spin-state-based magnetic field quantum sensor. In the diamond nitrogen-vacancy (NV) centre system, the qubit resonance is excited by the microwave signal, and the frequency shift is proportional to the external magnetic field strength. Conventional narrow-band antennas or single resonators are not able to match the resonance frequency of the NV centre over a wide bandwidth, resulting in degraded sensitivity and dynamic range of the sensor. Here, the authors designed a compact broadband antenna, which achieves a fractional bandwidth of 71.43% at the Zeeman splitting frequency of 2.87 GHz. With the introduced slot structure on the antenna, a higher microwave near field strength can also be achieved, which improves the magnetic field sensitivity and dynamic range. By applying our design antenna, the experimental results indicate that the NV-based quantum sensor achieves a sensitivity of 3.07 μT/Hz^1/2 and a dynamic range up to 44.9 dB, which are both greatly improved compared to sensor that uses a conventional antenna.

Original language	English
Pages (from-to)	893-895
Number of pages	3
Journal	Electronics Letters
Volume	58
Issue number	24
Early online date	21 Oct 2022
DOIs	https://doi.org/10.1049/ell2.12649
Publication status	Published - 21 Nov 2022

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (NO. 62105294) and the National Key Scientific Instrument and Equipment Development Project of China (NO. 6202780147).

Publisher Copyright:
© 2022 The Authors. Electronics Letters published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

Keywords

Antennas and Propagation
Letter

ASJC Scopus subject areas

Electrical and Electronic Engineering

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CuiM2022DiamondFinal published version, 1.25 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Diamond nitrogen-vacancy centres spin-state-based quantum sensor using a compact broadband antenna",

abstract = "This paper presents a compact broadband antenna that is used in the spin-state-based magnetic field quantum sensor. In the diamond nitrogen-vacancy (NV) centre system, the qubit resonance is excited by the microwave signal, and the frequency shift is proportional to the external magnetic field strength. Conventional narrow-band antennas or single resonators are not able to match the resonance frequency of the NV centre over a wide bandwidth, resulting in degraded sensitivity and dynamic range of the sensor. Here, the authors designed a compact broadband antenna, which achieves a fractional bandwidth of 71.43% at the Zeeman splitting frequency of 2.87 GHz. With the introduced slot structure on the antenna, a higher microwave near field strength can also be achieved, which improves the magnetic field sensitivity and dynamic range. By applying our design antenna, the experimental results indicate that the NV-based quantum sensor achieves a sensitivity of 3.07 μT/Hz1/2 and a dynamic range up to 44.9 dB, which are both greatly improved compared to sensor that uses a conventional antenna.",

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note = "Funding Information: This work was supported by the National Natural Science Foundation of China (NO. 62105294) and the National Key Scientific Instrument and Equipment Development Project of China (NO. 6202780147). Publisher Copyright: {\textcopyright} 2022 The Authors. Electronics Letters published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.",

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AU - Cui, Mingming

AU - Shen, Fazhong

AU - Qiao, Yingying

AU - Du, Guanxiang

AU - Zhuo, Xiang

AU - Zang, Jiawei

AU - Zhang, Zhenyuan

AU - Wang, Yi

AU - Li, Lei

AU - Gao, Yang

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (NO. 62105294) and the National Key Scientific Instrument and Equipment Development Project of China (NO. 6202780147). Publisher Copyright: © 2022 The Authors. Electronics Letters published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

PY - 2022/11/21

Y1 - 2022/11/21

N2 - This paper presents a compact broadband antenna that is used in the spin-state-based magnetic field quantum sensor. In the diamond nitrogen-vacancy (NV) centre system, the qubit resonance is excited by the microwave signal, and the frequency shift is proportional to the external magnetic field strength. Conventional narrow-band antennas or single resonators are not able to match the resonance frequency of the NV centre over a wide bandwidth, resulting in degraded sensitivity and dynamic range of the sensor. Here, the authors designed a compact broadband antenna, which achieves a fractional bandwidth of 71.43% at the Zeeman splitting frequency of 2.87 GHz. With the introduced slot structure on the antenna, a higher microwave near field strength can also be achieved, which improves the magnetic field sensitivity and dynamic range. By applying our design antenna, the experimental results indicate that the NV-based quantum sensor achieves a sensitivity of 3.07 μT/Hz1/2 and a dynamic range up to 44.9 dB, which are both greatly improved compared to sensor that uses a conventional antenna.

AB - This paper presents a compact broadband antenna that is used in the spin-state-based magnetic field quantum sensor. In the diamond nitrogen-vacancy (NV) centre system, the qubit resonance is excited by the microwave signal, and the frequency shift is proportional to the external magnetic field strength. Conventional narrow-band antennas or single resonators are not able to match the resonance frequency of the NV centre over a wide bandwidth, resulting in degraded sensitivity and dynamic range of the sensor. Here, the authors designed a compact broadband antenna, which achieves a fractional bandwidth of 71.43% at the Zeeman splitting frequency of 2.87 GHz. With the introduced slot structure on the antenna, a higher microwave near field strength can also be achieved, which improves the magnetic field sensitivity and dynamic range. By applying our design antenna, the experimental results indicate that the NV-based quantum sensor achieves a sensitivity of 3.07 μT/Hz1/2 and a dynamic range up to 44.9 dB, which are both greatly improved compared to sensor that uses a conventional antenna.

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Diamond nitrogen-vacancy centres spin-state-based quantum sensor using a compact broadband antenna

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