Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Optimizing the sensitivity of an NV-diamond magnetometer

Matthew J. Turner, David Le Sage, Ronald Lee Walsworth

Published Jun 11, 2015• 0 citations
OpenAlex

Related papers

Diamond Photonic Crystal for Compact, Highly Sensitive, and Low-Power NV Magnetometers

Yves Christian Nonguierma, Alexandre Guilbault, Alexis Roy +2 more

International Conference on Optical MEMS and Nanophotonics•Aug 1, 2026•0 citations

Optimizing the resolution and the sensitivity of a scanning NV magnetometer

Sungkun Hong, Patrick Maletinsky, M. S. Grinolds +6 more

Bulletin of the American Physical Society•Feb 27, 2012•0 citations

Gradiometer using NV center in spatially-isolated equal-quality diamond pair for highly sensitive quantum magnetometers

Katsumi Suzuki, Y. MASUYAMA, Takeshi Ohshima +2 more

International Conference on Solid State Devices and Materials (SSDM)•Sep 28, 2020•0 citations

Gradiometer using NV center in spatially-isolated equal-quality diamond pair for highly sensitive quantum magnetometers

克 鈴木, Katsumi Suzuki, 雄太 増山 +6 more

•Sep 1, 2020•0 citations

Improving the sensitivity of diamond NV center ensemble magnetometer based on microsphere

Yangyang Zhou, Jiong Tang, Bingxu Ma +1 more

Diamond nitrogen-vacancy (NV) center ensemble magnetometer is a novel solid quantum magnetometer with high sensitivity and high spatial resolution, which can be used at normal temperature and pressure. However, the low fluorescence collection efficiency of the magnetometer in confocal optical system hinders further improvement in sensitivity. To solve the problem, based on silica microspheres, we propose a method to enhance the excitation and collection efficiency of NV center ensemble in massive diamond. Experimental results show, compared with the NV diamond magnetometer without microspheres, the photon collection efficiency of NV diamond magnetometer coated with a layer of microspheres is increased by 110%. Thus, the sensitivity of the NV center magnetometer is increased by 4 times to 5.3μT/√Hz.

International Conference on Optical and Photonic Engineering (icOPEN)•Feb 5, 2025•0 citations

Millimeter-scale rigid diamond probe for high sensitivity endoscopic-magnetometry applications

Jihongbo Shen, Heng Yuan, Hongyu Tao +6 more

Magnetometry based on diamond nitrogen-vacancy (NV) centers has been extensively studied for applications requiring diverse capabilities, spanning from nanometer spatial resolution to subpicotesla sensitivity. Among various applications, diamond magnetometers can demonstrate high sensitivity magnetic sensing within millimeter-scale size for endoscopic applications. However, the trade-off between sensitivity and spatial resolution of diamond magnetometry makes it difficult to achieve such a probe. In this study, we present a millimeter-scale rigid diamond magnetometer probe with enhanced sensitivity via optimizing the optical design. By coupling the frustum diamond with the miniaturized compound parabolic concentrator (CPC) lens, we enhance the fluorescence collection efficiency by 37% within 4 mm diameter, and the achieved sensitivity is 200 pT/Hz1/2 based on the sample with the resonance linewidth of ~8 MHz. With this verified structure, endoscopes with mm-size probe and picotesla sensitivity can be projected for surgical and industrial applications in the future.

physics.ins-detCross-listedarXiv:2602.06077•Feb 5, 2026
Diamond nitrogen-vacancy (NV) center ensemble magnetometer is a novel solid quantum magnetometer with high sensitivity and high spatial resolution, which can be used at normal temperature and pressure. However, the low fluorescence collection efficiency of the magnetometer in confocal optical system hinders further improvement in sensitivity. To solve the problem, based on silica microspheres, we propose a method to enhance the excitation and collection efficiency of NV center ensemble in massive diamond. Experimental results show, compared with the NV diamond magnetometer without microspheres, the photon collection efficiency of NV diamond magnetometer coated with a layer of microspheres is increased by 110%. Thus, the sensitivity of the NV center magnetometer is increased by 4 times to 5.3μT/√Hz.
Magnetometry based on diamond nitrogen-vacancy (NV) centers has been extensively studied for applications requiring diverse capabilities, spanning from nanometer spatial resolution to subpicotesla sensitivity. Among various applications, diamond magnetometers can demonstrate high sensitivity magnetic sensing within millimeter-scale size for endoscopic applications. However, the trade-off between sensitivity and spatial resolution of diamond magnetometry makes it difficult to achieve such a probe. In this study, we present a millimeter-scale rigid diamond magnetometer probe with enhanced sensitivity via optimizing the optical design. By coupling the frustum diamond with the miniaturized compound parabolic concentrator (CPC) lens, we enhance the fluorescence collection efficiency by 37% within 4 mm diameter, and the achieved sensitivity is 200 pT/Hz1/2 based on the sample with the resonance linewidth of ~8 MHz. With this verified structure, endoscopes with mm-size probe and picotesla sensitivity can be projected for surgical and industrial applications in the future.