报 告 人 : 宋前举（重庆大学物理学院）
时 间 : 2020年12月24号（星期四）晚上 19点 00 分
地 点 : 物理学院 LE705
邀 请 人 :软凝聚态物理及智能材料研究重庆市重点实验室
报告摘要：
Some photonic and plasmonic chains and slabs have bound states in the continuum (BICs) that have infinite quality (Q)-factors even though their frequencies and momentums are matched to vacuum modes. We show that a prototypical system provides an analytically solvable model for BICs. Under a parity-time (PT)-symmetric perturbation, we further show rigorously that a BIC always splits into a pair of new type BIC and lasing threshold mode. Different from the ordinary BIC, these PT symmetry-induced BICs (pt-BICs) can be excited by an external source but do not radiate, and they carry a reduced Q-factor divergence rate compared with the ordinary ones. All these results clearly demonstrate that the interplay between PT-symmetry and BICs is capable of spawning a host of novel phenomena unseen in the physics of PT-symmetry.
报告人介绍：
重庆大学物理学院在读博士生，师从韩德专研究员，研究方向为微纳光子学和表面等离子激元等，近年来在《Science Advances》、《Physical Review A》等期刊上发表SCI论文4篇。
