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.

Spatial and spectral mode-selection effects in topological lasers with frequency-dependent gain / Seclì, Matteo; Ozawa, Tomoki; Capone, Massimo; Carusotto, Iacopo. - In: APL PHOTONICS. - ISSN 2378-0967. - 6:5(2021), pp. 1-9. [10.1063/5.0041124]

Spatial and spectral mode-selection effects in topological lasers with frequency-dependent gain

Seclì, Matteo;Capone, Massimo;
2021-01-01

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.
2021
6
5
1
9
050803
10.1063/5.0041124
https://arxiv.org/abs/2012.10709
Seclì, Matteo; Ozawa, Tomoki; Capone, Massimo; Carusotto, Iacopo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/122989
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