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 张媛;魏冰妍;刘圣;李鹏;陈馨;吴云龙;豆贤安;赵建林(MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,and Shaanxi Key Laboratory of Optical Information Technology,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China;State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,and Shaanxi Key Laboratory of Optical Information Technology,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China [2]State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,China

出　　处：《Chinese Optics Letters》2020年第8期40-43,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Nos.11804277,11634010,61675168,and 11774289);the National Key R&D Program of China(No.2017YFA0303800);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2019JQ-616);the Open Research Fund of State Key Laboratory of Pulsed Power Laser Technology(No.SKL2019KF08);the Fundamental Research Funds for the Central Universities(Nos.310201911cx022 and3102019JC008);the Openof National Laboratory of Solid State Microstructures(No.M31040);the Anhui Provincial Natural Science Foundation(No.1908085QF275)。

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.

关 键 词：circular Airy beam autofocusing liquid crystal photoalignment technique 

分 类 号：O43[机械工程—光学工程]