Linearized theory of the fluctuation dynamics in two-dimensional topological lasers

Anno: 2021

Autori: Loirette-Pelous A., Amelio I., Secli M., Carusotto I.

Affiliazione autori: Univ Paris Saclay, CNRS, Inst Opt, Lab Charles Fabry,Grad Sch, F-91127 Palaiseau, France; INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Int Sch Adv Studies SISSA, Via Bonomea 265, I-34136 Trieste, Italy.

Abstract: 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.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 104 (5)      Da Pagina: 053516-1  A: 053516-12

Maggiori informazioni: We acknowledge stimulating exchanges with Moti Segev and useful discussions with Stefano Longhi. We acknowledge financial support from the European Union Horizon 2020 Research and Innovation Program under Grant Agreement No. 820392 (H2020-FETFLAG-2018-2020 project “PhoQuS”) and from the Provincia Autonoma di Trento. A.L.-P. thanks the Ecole Normale Superieure de Paris-Saclay for the financial support.
Parole chiavi: electrons
DOI: 10.1103/PhysRevA.104.053516

Citazioni: 5
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-11
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