Circular Airy beams realized via the photopatterning of liquid crystals [Invited]

• 作 者: Yuan Zhang Bingyan Wei Sheng Liu Peng Li Xin Chen Yunlong Wu Xian\'an Dou Jianlin Zhao
• 机 构: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key
• 出 处: 中国光学快报（英文版）
• 发表日期: 2020年8期
• 关键词: circular Airy beam autofocusing liquid crystal photoalignment technique

The generation of an autofocusing circular Airy beam (CAB) is realized via a liquid crystal (LC) geometric phase plate with a simple configuration.The fabrication of the LC plate is based on the photoalignment technology and dynamic exposure skill.A focal length of 74 cm is obtained,and the propagation dynamics are consistent with the simulations.Besides,a defocusing CAB is also generated,and the switch between the autofocusing and defocusing CABs can be achieved by controlling the input polarization state.This work provides a convenient and flexible approach to acquire CABs,which will promote the CAB-related applications and researches.