理学院学术报告20211105
发布人:何杰  发布时间:2021-11-02   浏览次数:10

里德堡原子中的多维光束克隆与光孤子分子


杭超    研究员/博导

华东师范大学 



   间:2021115上午10:00

腾讯会议:138 162 831


报告摘要:High-fidelity and controllable optical cloning of high-dimensional (high-D) optical beams is very important for the development of novel techniques for optical imaging, lithography, and communications, etc. In the first part, we propose a scheme to realize the cloning of high-D optical beams with a Rydberg atomic gas via electromagnetically induced transparency (EIT). We show that strong atom-atom interaction can map to two probe laser fields, which may acquire giant nonlocal Kerr nonlinearities supporting the formation of stable high-D optical solitons and vortices at very low light power. We also show that such optical solitons and vortices prepared in one probe field can be cloned onto another one with high fidelity. Moreover, we demonstrate that based on such a cloning scheme multi-times and multi-components cloning of high-D optical beams are also possible, which allows us to acquire multiple copies of high-D optical beams. In the second part, we show briefly that it is possible to acquire nonlocal high-D optical soliton molecules, with a system of cold Rydberg atomic gas working under the condition of EIT. Moreover, such soliton molecules have large sizes, low generation powers, and can be active controlled by the nonlocality degree of nonlocal Kerr nonlinearity.


报告人简介杭超,2007年毕业于华东师范大学物理系,获理学博士学位。2007年至2011年任华东师范大学精密光谱实验室讲师;2008年至2011年在葡萄牙里斯本大学做博士后;2012年至2017年任华东师范大学精密光谱实验室副研究员;2018年至今任华东师范大学精密光谱实验室研究员(教授)。主要方向为玻色-爱因斯坦凝聚中的非线性物质波动力学;光与多能级原子相互作用体系的量子非线性光学;宇称-时间对称的原子实现及其光学特性非线性量子光学在精密测量与量子信息领域的应用等。