Single-mode lasing based on PT-breaking of two-dimensional photonic higher-order topological insulator

• Main Authors: Zhu, Bofeng, Wang, Qiang, Zeng, Yongquan, Wang, Qi Jie, Chong, Yidong
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics; Single-Mode Lasing; PT-Symmetry; Higher-Order Topological Insulators
• Online Access: https://hdl.handle.net/10356/154519
• Institution: Nanyang Technological University

Topological lasers are a new class of lasers that seek to exploit the special properties of topological states of light. A typical limiting factor in their performance is the existence of non-topological states with quality factors comparable to the desired topological states. We show theoretical...