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

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)], 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. (C) 2020 Optical Society of America

Automated summary

A new class of angular dependent autofocusing ring Pearcey beams with a cross-phase structure is introduced in this Letter, showing non-uniform abrupt autofocusing behavior. The focal length, focusing ability, and direction of the beams can be adjusted flexibly using only the cross-phase structure. Poynting vectors are used to convincingly demonstrate the beam-focusing mechanism, with potential applications in optical tweezing, three-dimensional printing, material processing, and more.