We theoretically study the collective excitation modes of a topological laser device operating in a single-mode steady state with monochromatic emission. We consider a model device based on a two-dimensional photonic Harper-Hofstadter lattice including a broadband gain medium localized on the system edge. Different regimes are considered as a function of the value of the optical nonlinearity and of the gain relaxation time. The dispersion of the excitation modes is calculated via a full two-dimensional Bogoliubov approach and physically interpreted in terms of an effective one-dimensional theory. Depending on the system parameters, various possible physical processes leading to dynamical instabilities are identified and characterized. On this basis, strategies to enforce a stable single-mode topological laser operation are finally pointed out.
Linearized theory of the fluctuation dynamics in two-dimensional topological lasers / Loirette-Pelous, A; Amelio, I; Secli, M; Carusotto, I. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 104:5(2021). [10.1103/PhysRevA.104.053516]
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Titolo: | Linearized theory of the fluctuation dynamics in two-dimensional topological lasers | |
Autori: | Loirette-Pelous, A; Amelio, I; Secli, M; Carusotto, I | |
Autori Unitn: | ||
Titolo del periodico: | PHYSICAL REVIEW A | |
Anno di pubblicazione: | 2021 | |
Numero e parte del fascicolo: | 5 | |
Codice identificativo WOS: | WOS:000722307000006 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevA.104.053516 | |
Handle: | http://hdl.handle.net/11572/342908 | |
Citazione: | Linearized theory of the fluctuation dynamics in two-dimensional topological lasers / Loirette-Pelous, A; Amelio, I; Secli, M; Carusotto, I. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 104:5(2021). [10.1103/PhysRevA.104.053516] | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |