光学
光学(聚焦)
贝塞尔函数
角谱法
物理
镜头(地质)
光学镊子
贝塞尔光束
激光器
衍射
作者
Zhoulin Ding,Yongji Yu,Xiaoqing Li,Siyao Li,Chunyu Hou
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2023-09-04
卷期号:31 (20): 33228-33228
被引量:7
摘要
We introduce what we believe to be a new family of abruptly autofocusing waves named autofocusing Bessel beams (ABBs). Since the beams only strongly influence the area near the focus, it holds promise for medical laser treatment and optical tweezers. By the angular spectrum method, ABBs are proved to be a class solution for the Helmholtz equation. The focal length is well-defined and easily tuned in our mathematical description. Under the finite energy limitation, the abruptly autofocusing and vortex characteristics of Gaussian-modulated ABBs are studied. Interestingly, we found a kind of abruptly autofocusing waves focusing twice on the propagation axis, which is formed by an ABB passing through a focusing lens. Dual-focus ABBs make it possible for a single laser to manipulate two particles on the propagation axis simultaneously. In the experiment, the autofocusing of ABBs and the dual focus of ABBs passing through a focusing lens are observed. This article provides a theoretical model and experimental protocol for studying abruptly autofocusing waves.
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