PT对称光晶格势中的涡旋光孤子传输特性的研究  

Research On the Transmission Characteristics of Vortex Optical Solitons in PT-symmetric Optical Lattice Potential

作　　者：徐四六[1,2] 吴桐 高鹏飞 侯毅恒 赵元[1,2] 范灼 XU Si-liu;WU Tong;GAO Peng-fei;HOU Yi-heng;ZHAO Yuan;FAN Zhuo(School of Biomedical Engineering and Imaging,Xianning Medical College,Hubei University of Science and Technology,Xianning 437100,China;Key Laboratory of Optoelectronic Sensing and Intelligent Control,Hubei University of Science and Technology,Xianning 437100,China;School of Electronic and Information Engineering,Hubei University of Science and Technology,Xianning 437100,China)

机构地区：[1]湖北科技学院医学部生物医学工程与医学影像学院,湖北咸宁437100 [2]湖北科技学院光电传感与智能控制重点实验室,湖北咸宁437100 [3]湖北科技学院电子信息与工程学院,湖北咸宁437100

出　　处：《湖北科技学院学报》2024年第4期1-6,12,共7页Journal of Hubei University of Science and Technology

基　　金：国家自然科学基金“PT对称超冷里德堡原子系统中的光孤子与量子非线性效应理论研究”(62275075);湖北省教育厅项目(B2022188);湖北省大创项目(S202210927003);湖北省自然科学基金(2023AFC042)。

摘　　要：本研究提出了一种实现具有宇称时间(PT)对称性的光学贝塞尔势的方案。通过从冷原子气体中光的衍射、非局域非线性和PT对称势约束之间的相互作用入手,研究了如何存在、传播和操纵二维涡旋光孤子。结果显示,该系统支持稳定的二维涡旋光孤子,其拓扑电荷最大值为|m|=6。此外,可通过控制PT对称晶格势的虚部来保证这种孤子的稳定性。由于里德堡-电磁感应透明(Rydberg-EIT)效应增强了局域和非局域非线性,因此这些二维涡旋光孤子只需要很低的功率就可以激发出来。研究结果不仅对PT对称势以及操纵二维涡旋光孤子有重要意义,还在光信息处理和传输方面具有很好的应用前景。In this paper,an optical Bessel potential with parity-time(PT)symmetry is proposed.The existence,propagation and manipulation of two-dimensional vortex solitons are investigated by the interaction between light diffraction,non-local nonlinearities and PT-symmetric potential constraints in cold atomic gas under Rydberg-EIT conditions.The results show that the system can support stable two-dimensional vortex solitons with the maximum topological charge.The stability of such solitons can be actively controlled by the imaginary part of PT-symmetry potential.Because the Rydberg-EIT effect enhances local and non-local nonlinearities,these two-dimensional vortex solitons require only very low power to excite.The results of this study not only generate PT symmetry potential and manipulate two-dimensional vortex optical solitons,but also have a good application prospect in optical information processing and transmission.

关 键 词：PT对称 里德堡-电磁感应透明 涡旋光孤子 贝塞尔晶格 

分 类 号：O437[机械工程—光学工程]