Nonlinear topological laser on the non-Hermitian Haldane model with higher-order corner states

The non-Hermitian skin effect (NHSE) on the non-Hermitian Haldane model with gain and loss on the honeycomb lattice with the outline of a triangle is discussed. The NHSE only occurs on the edge of the lattice, transforming the edge modes into the higher-order corner modes. The NHSE can also occur on...

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Published inOptics express Vol. 31; no. 24; pp. 39424 - 39432
Main Authors Wei, Mei-Song, Wang, Yi-Qing, Liao, Ming-Jie, Yang, Yaping, Xu, Jingping
Format Journal Article
LanguageEnglish
Published 20.11.2023
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Summary:The non-Hermitian skin effect (NHSE) on the non-Hermitian Haldane model with gain and loss on the honeycomb lattice with the outline of a triangle is discussed. The NHSE only occurs on the edge of the lattice, transforming the edge modes into the higher-order corner modes. The NHSE can also occur on a lattice with only loss, which can be treated as a lattice with gain and loss as well as a global loss added to it. When the saturated gain is added to the three corner sites of the dissipative lattice, a single-mode laser system is obtained. When any one site is stimulated initially, the system will reach a saturated state depending on the distribution of the corner modes, and the stable laser light is emitted by sites at the corners.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.503800