Journal
APL PHOTONICS
Volume 6, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0041124
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Funding
- European Union H2020-FETFLAG-2018-2020 project PhoQuS [820392]
- Provincia Autonoma di Trento
- JSPS KAKENHI [JP20H01845]
- JST PRESTO Grant [JPMJPR19L2]
- JST CREST Grant [JPMJCR19T1]
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In this study, a semiclassical theory of laser oscillation in a chiral edge state of a topological photonic system with frequency-dependent gain is developed. By considering a Harper-Hofstadter lattice embedding two-level atoms as a gain material, the researchers demonstrate a flexible mode-selection mechanism that can stabilize single-mode lasing into an edge state. The implications of these results for recent experiments are outlined.
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.
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