Xin Liu, Li Zhaoqing, Monfared Yashar E, Liang Chunhao, Wang Fei, Hoenders Bernhard J, Cai Yangjian, Ma Pujuan
Opt Lett. 2021 Jan 1;46(1):70-73. doi: 10.1364/OL.413380.
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)OPLEDP0146-959210.1364/OL.43.003626], 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.
在本信函中，我们通过施加交叉相位结构引入了一类新型的角相关自聚焦环形皮尔斯光束。由于这种结构，该光束呈现出非均匀的突然自聚焦行为。与没有交叉相位的环形皮尔斯光束的特性[《光学快报》43, 3626 (2018) OPLEDP0146 - 959210.1364/OL.43.003626]不同，借助仅交叉相位结构，我们可以灵活地调整光束的焦距及其聚焦能力，以及环形皮尔斯光束的方向。此外，利用坡印廷矢量令人信服地证明了光束聚焦机制。这种具有这些迷人特性的光束有望在光镊、三维打印、材料加工等领域找到潜在应用。
