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

• 作者: Bingyan Wei Jianlin Zhao Peng Li Sheng Liu Xian'an Dou Xin Chen Yuan Zhang Yunlong Wu
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（8）
• 所属期刊栏目: Special Issue on Soft-matter Photonics
• 页码范围: 40-43
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL202018.080008

摘要

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.