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Flexible autofocusing properties of ring Pearcey beams by means of a cross phase

Liu Xin, Zhaoqing Li, Yashar E. Monfared, Chunhao Liang, Fei Wang, Bernhard J. Hoenders, Yangjian Cai, and Pujuan Ma

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Abstract

In this Letter, we introduce a new class of angular dependent autofocusing ring Pearcey beams by imposing a cross-phase structure. Due to this structure, the beam exhibits a non-uniform abrupt autofocusing behavior. Unlike the properties of the ring Pearcey beam without a cross phase [Opt. Lett. 43, 3626 (2018) [CrossRef]  ], we can flexibly adjust the focal length of the beam and its focusing ability, as well as the direction of the ring Pearcey beams, with the help of only the cross-phase structure. Furthermore, the Poynting vectors are employed to demonstrate convincingly the beam-focusing mechanism. Such beams with these fascinating characteristics are anticipated to find potential applications in optical tweezing, three-dimensional printing, material processing, and so on.

© 2020 Optical Society of America

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