Topological bulk lasing modes using an imaginary gauge field

Wong, Stephan and Oh, Sang Soon ORCID: https://orcid.org/0000-0003-3093-7016 2021. Topological bulk lasing modes using an imaginary gauge field. Physical Review Research 3 (3) , 033042. 10.1103/PhysRevResearch.3.033042

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Additional Information:	An Erratum for this article can be seen at http://dx.doi.org/10.1103/PhysRevResearch.4.019001 http://orca.cf.ac.uk/148367
Publisher:	American Physical Society
ISSN:	2643-1564
Funders:	European Regional Development Fund
Related URLs:	Publisher
Date of First Compliant Deposit:	14 July 2021
Date of Acceptance:	16 June 2021
Last Modified:	05 Jan 2024 07:29
URI:	https://orca.cardiff.ac.uk/id/eprint/142531

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