Linearized theory of the fluctuation dynamics in 2D topological lasers
| Autor: | Loirette-Pelous, Aurelian, Amelio, Ivan, Seclì, Matteo, Carusotto, Iacopo |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 104, 053516 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.104.053516 |
| Popis: | 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. Comment: 13 pages, 6 figures |
| Databáze: | arXiv |
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