*Reporter：Luqi Yuan, Professor (Shanghai Jiao Tong University)

*Time：Oct. 16^th , 2024 (Wednesday) 10:00am

*Place：Room B-203 Science Building, Liangxiang Campus

*Contact Person: Tian Chen, Associate Professor, chentian@bit.edu.cn

*Abstract:

Synthetic dimensional photonics, which utilizes multiple degrees of freedom of light fields to construct artificial synthetic dimensions and study optical simulation physics problems, has recently received widespread attention internationally. Based on the frequency degrees of freedom of the optical field, constructing a photon tight confinement model on the optical frequency axis through dynamic electro-optic modulation, i.e. synthesizing the frequency dimension, is also of great significance for the research of optical simulation and optical field control direction. In this talk, I will introduce the frequency dimension foundation of photon synthesis, report on the research progress of constructing a series of artificial photon lattice models through the design of resonant cavity systems and modulation signals, and carry out many experimental verifications and theoretical explorations, including photon band observation, topological characterization, and non-Hermitian researches. I will showcase various optical simulation phenomena related to physical concepts such as the effective gauge field, topological edge flow, dynamic band, flat-band localization, time modulation, and non-Abelian interference. Our works are based on the artificial fabrication of photonic lattices, providing a new multi-dimensional light field control scheme through controllable external electric fields. It is expected to have potential applications in fields such as optical signal processing, photon state manipulation, and photonic chip design in the future.

*Profile：

Dr. Luqi Yuan, Professor and Doctoral Supervisor at the School of Physics and Astronomy, Shanghai Jiao Tong University. His researches are mainly engaged in photonics, quantum optics and related fields, with research directions including photon synthesis dimension, topology and non-Hermitian photonics, mixed light quantum systems, etc. Up to now, He has published over 100 peer-reviewed papers and served as an editorial board member for many prestigious journals, such as Communications Physics, Ultrafast Science, and Advanced Photonics.