Off-Axis Magnetic Sensing via Dissipative Spin Dynamics Probed by Time-Resolved Fluorescence in Diamond.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-09-30 DOI:10.1021/acs.nanolett.5c03898

Baiqiang Zhu,Fei Liu,Jia-Xin Peng,Zhifei Yu,Jianpei Geng,Keye Zhang,Bing Chen

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引用次数: 0

Abstract

Magnetic field sensing with a nitrogen-vacancy (NV) center in diamond typically relies on coherent spin manipulation, which is susceptible to spin dephasing noise. Here, we demonstrate an alternative protocol that exploits dissipative spin dynamics, probed through time-resolved fluorescence, to extract off-axis magnetic field information without relying on spin coherence. The approach operates under continuous optical excitation and leverages spin-dependent transition channels to encode both the strength and orientation of the magnetic field into the fluorescence dynamics. Numerical simulations incorporating Gaussian magnetic noise confirm that the protocol remains robust against spin dephasing, maintaining a stable estimation performance even under short coherence times. We further develop a general parameter estimation framework based on photoluminescence trajectories, enabling off-axis field reconstruction from experimental measurements. The method is experimentally validated and may be adapted to other fluorescence-based spin defect platforms including silicon carbide and hexagonal boron nitride.

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金刚石中时间分辨荧光探测的耗散自旋动力学离轴磁传感。

金刚石中氮空位（NV）中心的磁场传感通常依赖于相干自旋操作，这容易受到自旋失相噪声的影响。在这里，我们展示了一种替代方案，利用耗散自旋动力学，通过时间分辨荧光探测，在不依赖自旋相干的情况下提取离轴磁场信息。该方法在连续光激发下工作，并利用自旋相关的过渡通道将磁场的强度和方向编码到荧光动力学中。结合高斯磁噪声的数值模拟证实，该协议对自旋失相仍然具有鲁棒性，即使在短相干时间下也能保持稳定的估计性能。我们进一步开发了一个基于光致发光轨迹的通用参数估计框架，使实验测量的离轴场重建成为可能。该方法经过实验验证，并且可以适用于其他基于荧光的自旋缺陷平台，包括碳化硅和六方氮化硼。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.