Fiber-Coupled Diamond Magnetometry with an Unshielded Sensitivity of 
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Graham, Suzanne; Rahman, Anisur; Munn, L.; Patel, R. L.; Newman, A.J.; Stephen, Colin; Colston, Gerard; Nikitin, Alexander P.; Edmonds, Andrew M.; Twitchen, Daniel J.; Markham, Matthew; Morley, Gavin W.

doi:10.1103/physrevapplied.19.044042

Cited by 15 publications

(3 citation statements)

References 104 publications

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“…The recent demonstration of electronic readout of an electronic spin state of a single NV centre [ 1 ] shows the potential for device fabrication for various quantum applications. These include magnetic field sensing, such as the recent achievement of high sensitivity high-frequency sensing using dynamical decoupling [ 2 ], and sensitive magnetometry with a fibre-coupled sensor [ 3 ]. The demonstration of repeated quantum error correction also proves NV centres are suitable as the basis for scalable quantum computation [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

A special issue preface: diamond for quantum applications

Nicley,

Morley,

Haenen

2023

Phil. Trans. R. Soc. A.

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This special issue discusses current progress in the utilization of defect centres in diamond as spin–photon interfaces for quantum applications. This issue is based on the discussions of the Theo Murphy meeting ‘Diamond for quantum applications' which covered the recent progress of diamond growth and engineering for the creation and optimization of colour centres, toward the integration of diamond-based qubits in quantum systems.This article is part of the Theo Murphy meeting issue 'Diamond for quantum applications'.

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Section: Introductionmentioning

confidence: 99%

A special issue preface: diamond for quantum applications

Nicley,

Morley,

Haenen

2023

Phil. Trans. R. Soc. A.

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“…In addition, due to the high spatial confinement, moderate laser (20 μW in fiber) and microwave (8 μW) source powers are used here. In contrast, either a high-level laser or a strong microwave is usually required with separated driving channels. ,, It indicates the high efficiency of spin manipulation with our device.…”

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confidence: 97%

“…Electromagnetic driving fields, ranging from visible light to radio frequency, are usually required for the full control of quantum systems, such as atoms, − trapped ions, − and solid-state spins. − Conventional free-space driving will limit the compactness, efficiency, and robustness of quantum devices. In pursuit of high practicality and scalability, intensive research on integrated transporting and modulating the multiple electromagnetic fields has been carried out over the last few decades. − On-chip quantum information processing devices − and portable quantum sensors − are designed to promote the practical quantum applications.…”

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confidence: 99%

Integrated Manipulation and Addressing of Spin Defect in Diamond

Ma,

Wu,

Liu

et al. 2024

Nano Lett.

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Scalable and addressable integrated manipulation of qubits is crucial for practical quantum information applications. Different waveguides have been used to transport the optical and electrical driving pulses, which are usually required for qubit manipulation. However, the separated multifields may limit the compactness and efficiency of manipulation and introduce unwanted perturbation. Here, we develop a tapered fiber-nanowire-electrode hybrid structure to realize integrated optical and microwave manipulation of solid-state spins at nanoscale. Visible light and microwave driving pulses are simultaneously transported and concentrated along an Ag nanowire. Studied with spin defects in diamond, the results show that the different driving fields are aligned with high accuracy. The spatially selective spin manipulation is realized. And the frequency-scanning optically detected magnetic resonance (ODMR) of spin qubits is measured, illustrating the potential for portable quantum sensing. Our work provides a new scheme for developing compact, miniaturized quantum sensors and quantum information processing devices.

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Fiber‐Integrated Diamond Quantum Sensor for High‐Voltage Current Measurements

Liu,

Nie,

Peng

et al. 2024

Advanced Sensor Research

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In power network systems, there is an urgent demand for highly accurate and miniaturized sensors, owing to their high safety level and limited installation space. Current sensors in high‐voltage grids are required to accommodate harsh environments and provide accurate measurements of several kiloamperes. Thus, this study proposed an integrated quantum diamond sensor to facilitate high‐accuracy, large‐dynamic‐range current measurements. The design incorporated optical fiber and directional microwave (MW) antennas to drive the diamond sensor, which significantly reduced the size and power consumption on the high‐voltage side. Remote‐control and demodulation systems are installed more than 10 m away from the low‐voltage side. The proposed approach achieved zero power consumption on the high‐voltage side and ensured efficient signal transmission. A passive diamond probe manufactured using microfabrication processes facilitated miniaturization and practical deployment. Through parameter optimization, a magnetic detection sensitivity of 4.86 nT·Hz−1/2 is achieved at a safe distance of 11 m, which can be further optimized to 0.77 nT·Hz−1/2 with enhanced MW power. This sensor achieved a current measurement error of ±0.4% in the 1000 A measurement range. Thus, this study provides a new solution for the application of diamond quantum sensors in power systems.

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Fiber-Coupled Diamond Magnetometry with an Unshielded Sensitivity of 30pT/Hz

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Cited by 15 publications

References 104 publications

A special issue preface: diamond for quantum applications

A special issue preface: diamond for quantum applications

Integrated Manipulation and Addressing of Spin Defect in Diamond

Fiber‐Integrated Diamond Quantum Sensor for High‐Voltage Current Measurements

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