2025年1月7日下午，新加坡南洋理工大学申艺杰教授应邀到我院进行学术交流，作题为《Topological optical skyrmions of free space-time》的学术报告。报告会由凌晓辉教授主持，院长谭延亮教授和副院长唐振坤教授出席了报告会，学院部分本硕学生和光学方向的老师参与了报告会。

申教授详细介绍了拓扑稳定的准粒子（如斯格明子）在量子场、固态物理和磁性材料中的研究进展，并分享了其最新的研究成果。他系统地阐述了拓扑光学准粒子的分类、实验生成方法及其拓扑控制。申教授指出，斯格明子的产生方法不仅限于偏振光，还可以通过自旋和坡印廷矢量等方式进行生成，为拓扑光学研究提供了更多的自由度。他还指出，超表面能够通过其特殊的结构和功能性设计，对光的传播和调控产生重要影响，从而实现斯格明子的产生和操控。更加有趣的是，斯格明子的生成不仅局限于光波，水波也能够表现出类似的拓扑特性。

报告结束后，申教授与现场师生进行了互动交流，详细解答了大家提出的问题。这次报告不仅拓展了学生们的学术视野，更激发了他们对科研问题的深入探讨兴趣。

申艺杰教授简介：

Yijie Shen is Nanyang Assistant Professor in School of Physical and Mathematical Sciences & School of Electrical and Electronic Engineering, Nanyang Technological University. He was previously a Marie Curie Senior Research Fellow in Optoelectronics Research Centre, University of Southampton, UK. He received the Ph.D. degree in optical engineering at the Department of Precision Instrument, Tsinghua University, China, in 2019. He received the B.S. degree in mechanical engineering and automation from South China University of Technology, China, in 2015. During Mar.-Jun. 2019, he was invited as a visiting researcher in School of Physics: Structured Light Laboratory, University of the Witwatersrand, Johannesburg, South Africa. He was recognized as members of the Chinese Optical Society, Chinese Society of Theoretical and Applied Mechanics, Optical Society of America, the Wang Da-Heng Optics Award in 2019, the Rising Stars in Optics 2024, IOP. He has published more than 100 papers in high-impact journals with >5000 citations (H-index of 33).