Abstract
We introduce a class of structured light beams, named multi-focus beams, which exhibit self-focusing at multiple propagation distances. We show that the proposed beams not only have the ability to produce multiple longitudinal focal spots, but also that the number, intensity, and position of the foci can be controlled by adjusting the initial beam parameters. Furthermore, we demonstrate that these beams still exhibit self-focusing in the shadow of an obstacle. We have experimentally generated such beams and the results are consistent with the theoretical predictions. Our studies may find application where fine control of the longitudinal spectral density is needed, such as longitudinal optical trapping and manipulation of multiple particles, and transparent material cutting.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Hui Zhang, Yibo Wang, Rong Lin, Jiayi Yu, Yangjian Cai, and Xinlei Zhu
Opt. Lett. 48(15) 4001-4004 (2023)
Jiayi Yu, Xinlei Zhu, Shuqin Lin, Fei Wang, Greg Gbur, and Yangjian Cai
Opt. Lett. 45(13) 3824-3827 (2020)
Zhiwen Yan, Ying Xu, Shuqin Lin, Hao Chang, Xinlei Zhu, Yangjian Cai, and Jiayi Yu
Opt. Express 31(16) 25680-25690 (2023)