2020/12/17 by Stephan Wong, Sang Soon Oh
Mathematics · Physics and Astronomy · #Field (mathematics) #Gauge (firearms) #Gauge theory #Laser #Lasing threshold #Materials science #Mathematics #Mechanical and Optical Resonators #Physics #Pure mathematics #Quantum Mechanics and Non-Hermitian Physics #Quantum electrodynamics #Quantum mechanics #Topological Materials and Phenomena #Topology (electrical circuits) #physics.optics
paper · pdf · doi:10.1103/physrevresearch.3.033042
published as Phys. Rev. Research 3, 033042 (2021) · 10 pages, 10 figures
arxiv created 2020/12/17 · openalex publication_date 2021/07/09 · arxiv updated 2021/07/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Topological edge modes, which are robust against disorders, have been used to enhance the spatial stability of lasers. Recently, it was revealed that topological lasers can be further stabilized using a topological phase in non-Hermitian photonic topological insulators. Here we propose a procedure to realize topologically protected modes extended over a d-dimensional bulk by introducing an imaginary gauge field. This generalizes the idea of zero-energy extended modes in the one-dimensional Su-Schrieffer-Heeger lattice into higher dimensional lattices, allowing a d-dimensional bulk mode that is topologically protected. Furthermore, we numerically demonstrate that the topological bulk lasing mode can facilitate high temporal stability superior to topological edge-mode lasers. Using an exemplified topological extended mode in the kagome lattice, we show that large regions of stability exist in its parameter space.