Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154519
Title: Single-mode lasing based on PT-breaking of two-dimensional photonic higher-order topological insulator
Authors: Zhu, Bofeng
Wang, Qiang
Zeng, Yongquan
Wang, Qi Jie
Chong, Yidong
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2021
Source: Zhu, B., Wang, Q., Zeng, Y., Wang, Q. J. & Chong, Y. (2021). Single-mode lasing based on PT-breaking of two-dimensional photonic higher-order topological insulator. Physical Review B, 104(14), L140306-. https://dx.doi.org/10.1103/PhysRevB.104.L140306
Project: MOE2016‐T3‐1‐006 
MOE2018-T2-1-176
MOE2016-T2-2-159 
MOE2019-T2-2-085
RG187/18 
NRF-CRP18-2017-02 
Journal: Physical Review B
Abstract: 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 theoretically that by distributing uniform gain and loss on two sublattices of a two-dimensional higher-order topological insulator (HOTI) lattice, single-mode lasing based on topological corner states can be sustained over a wide range of pump strengths. This behavior stems from the parity/time-reversal breaking of the topological corner states, which supplies them with more effective gain than the edge and bulk states, rather than through localized pumping of the domain corners. These results point to opportunities for exploiting non-Hermitian phenomena and designing compact high performance topological lasers.
URI: https://hdl.handle.net/10356/154519
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.104.L140306
Rights: © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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