Author Affiliations
Abstract
1 Advanced Photonics Center, Southeast University, Nanjing 210096, China
2 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
Photonic structures with topological edge states and resonance loops are both important in optical communication systems, but they are usually two separate structures. In order to obtain a photonic system combining properties from both, we design multiple-layer nested photonic topological structures. The nested topological loops not only have topological protection immune to structural disorder and defects, but also possess both the properties of unidirectional propagation and loop resonance. Through mode analysis and simulations, we find that the transport can form diverse circulation loops. Each loop has its own resonance frequencies and can be solely excited in the nested layered structure through choosing its resonance frequencies. As a result, this work shows great application prospects in the area of reconfigurable photonic circuits.
topological edge states unidirectional propagation loops resonance reconfigurability Chinese Optics Letters
2022, 20(6): 061301
1 安庆师范大学物理和电气工程学院, 安徽 安庆 246133
2 江苏大学计算机科学与通信工程学院, 江苏 镇江 212013
为了获得圆偏振和激光输出一体化的结构,利用增益和损耗微腔、磁性微腔和金属层组成一个复合结构体系,并借助4×4传输矩阵研究该结构的传输特性。结果发现,该结构在一定结构参数范围内产生了较强的法拉第旋转效应,并获得了增益传输模式,实现了多种椭圆偏振或圆偏振激光的同时输出。此外,在某些特定结构参数和特定波长条件下,该结构会产生超强的圆偏振激光。
激光器 磁光效应 圆偏振 增益传输 耦合共振