arXiv 2602.030052026-02-03physics.optics

利用聚焦的拉格朗日-高斯光束旋转荧光纳米钻石组装体

Rotating fluorescent nanodiamond assemblies with focused Laguerre-Gaussian beams

School of Physics, The University of New South Wales（新南威尔士大学物理学院）；School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney（悉尼科技大学工程与信息学院生物医学工程系）；School of Clinical Medicine, The University of New South Wales（新南威尔士大学临床医学院）；School of Natural and Computing Science, University of Aberdeen（阿伯丁大学自然与计算科学学院）；Department of Physics, The University of Melbourne（墨尔本大学物理系）

Adam Stewart, Anthony J. El-Helou, Ying Zhu, David McGloin, David A. Simpson, Peter J. Reece

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AI总结：

本研究利用拉格朗日-高斯光束实现荧光纳米钻石簇的受控旋转，并通过二维运动探索磁场重建的额外信息。

摘要：

利用结构化光场的光学镊子能够通过将轨道角动量（OAM）从全息生成的拉格朗日-高斯（LG）模式转移来使被捕获的纳米颗粒旋转。在本研究中，我们利用OAM转移来演示在聚焦的高阶LG光束中组装的明亮荧光纳米钻石簇的受控旋转。我们发现，这些组装体可以在具有高达5 Hz轨道频率的二维光学陷阱中被有效旋转。我们利用视频追踪来探索此类捕获排列的布朗运动，并研究方向稳定性对应用弱外部磁场下的光学检测磁共振（ODMR）测量的影响。通过在轨道上多个点收集ODMR光谱，我们证明了受约束的二维运动可以为矢量磁场重建提供额外的见解。

英文摘要：

Optical tweezers which utilize structured light fields enable the rotation of trapped nanoparticles through the transfer of orbital angular momentum (OAM) from holographically generated Laguerre-Gaussian (LG) modes. In this research we use OAM transfer to demonstrate controlled rotation of bright fluorescent nanodiamond clusters assembled in a focused higher-order LG beam. We find that the assemblies can be effectively rotated in a two-dimensional optical trap with orbital frequencies of up to 5 Hz. We use video tracking to explore the Brownian dynamics of such a trapping arrangement and look at the impact of orientation stability on measurements of optically detected magnetic resonance (ODMR) with an applied weak external magnetic field. By collecting ODMR spectra at multiple points along the orbit, we show that the constrained two-dimensional motion can provide additional insights for vector magnetic field reconstruction.

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