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| 基于模式提取产生矢量Bessel光束的可调梯度力特性研究 |
| Study on the adjustable gradient force properties of vector Bessel beams based on mode extraction principle |
| 投稿时间：2025-02-05 |
| DOI：10.3969/j.issn.1005-5630.202502050017 |
| 中文关键词: 梯度力 模式提取 矢量Bessel光束 光陷阱 |
| 英文关键词:gradient force mode extraction principle vector Bessel beams optical traps |
| 基金项目:国家自然科学基金 (62305222)；国家重点研究开发计划(2018YFC1313803) |
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| 中文摘要: |
| 光学梯度力在光镊技术中起着重要的作用。本文基于模式提取原理，从单个矢量Bessel光束中提取任意偏振模式，研究了不同偏振模式下矢量Bessel光束梯度力的调制效应。模拟结果表明，不同拓扑数和偏振阶数均可以显著调节焦点区域梯度力的分布，在拓扑数为0的情况下，矢量Bessel光束梯度力大小随偏振阶数的增大而显著增大，但不同拓扑数对矢量Bessel光束梯度力的演化规律也有明显差异。该光束可形成多个可控的光陷阱，改变偏振方向，可以使光陷阱有规律地移动，可用于微粒的捕获和搬运。这项工作不仅对矢量Bessel光束梯度力的深入研究具有重要意义，而且可用于构建可调光镊，得到所需的光陷阱。 |
| 英文摘要: |
| The optical gradient force plays a pivotal role in optical tweezers technology. This paper investigates the modulation effects of the gradient force in vector Bessel beams with arbitrary polarization modes using mode extraction principle. Simulation results indicate that both the topological charge and polarization order can significantly modify the distribution of the gradient force in the focal region. In the case of a topological charge of 0, the magnitude of the vector Bessel beams gradient force increases significantly with the polarization order. However, distinct topological charges exhibit noticeable differences in the evolution of the vector Bessel beam gradient force. Additionally, multiple controllable optical traps can be generated, and by altering the polarization direction, these traps can be made to move in a systematic manner. This capability can be utilized for the capture and manipulation of microparticles. This work is not only of significant importance for the in-depth study of the vector Bessel beam gradient force but also provides potential applications for constructing tunable optical tweezers to achieve the desired optical traps. |
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