@article{49f73874cfee479b9f543e3f9a46a036,
title = "Spatial and spectral mode-selection effects in topological lasers with frequency-dependent gain",
abstract = "We develop a semiclassical theory of laser oscillation into a chiral edge state of a topological photonic system endowed with a frequency-dependent gain. As an archetypal model of this physics, we consider a Harper-Hofstadter lattice embedding population-inverted, two-level atoms as a gain material. We show that a suitable design of the spatial distribution of gain and its spectral shape provides flexible mode-selection mechanisms that can stabilize single-mode lasing into an edge state. Implications of our results for recent experiments are outlined.",
author = "Matteo Secl{\`i} and Tomoki Ozawa and Massimo Capone and Iacopo Carusotto",
note = "Funding Information: We warmly acknowledge continuous stimulating exchanges with Boubacar Kant{\'e}. We are grateful to Aurelian Loirette-Pelous and Ivan Amelio for continuous discussions on topolaser dynamics, and we thank Maxim Gorlach for discussions on our preliminary results. We acknowledge financial support from the European Union H2020-FETFLAG-2018-2020 project “PhoQuS” (Grant No. 820392) and from the Provincia Autonoma di Trento. T.O. acknowledges support from JSPS KAKENHI Grant No. JP20H01845, JST PRESTO Grant No. JPMJPR19L2, and JST CREST Grant No. JPMJCR19T1. The numerical simulations were performed on SISSA{\textquoteright}s Ulysses cluster. Publisher Copyright: {\textcopyright} 2021 Author(s).",
year = "2021",
month = may,
day = "1",
doi = "10.1063/5.0041124",
language = "English",
volume = "6",
journal = "APL Photonics",
issn = "2378-0967",
publisher = "AIP Publishing LLC",
number = "5",
}