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 ...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.展开更多
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)+4 种基金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)。
文摘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.
