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dc.contributor.authorZapletal, Petren
dc.contributor.authorGalilo, Bogdanen
dc.contributor.authorNunnenkamp, Andreasen
dc.date.accessioned2020-07-23T23:30:32Z
dc.date.available2020-07-23T23:30:32Z
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/308337
dc.description.abstractCombining topologically-protected chiral light transport and laser amplification gives rise to topological lasers, whose operation is immune to fabrication imperfections and defects, uncovering the role of topology in a novel nonlinear non-Hermitian regime. We study a topological laser based on the photonic Haldane model with selective pumping of chiral edge modes described by saturable gain. We investigate elementary excitations around the mean-field steady state and their consequences for the coherence properties. In particular, we show that the hybridization of chiral edge modes gives rise to long-lived elementary excitations, leading to large phase fluctuations in the emitted light field and a decrease of light coherence. In contrast to topologically trivial lasers, the lifetime of elementary excitations is robust against disorder in topological lasers. However, the lifetime strongly depends on the edge-mode dispersion around the lasing frequency. As a result, the lifetime can be reduced by orders of magnitude for lasing of different edge modes, leading to a suppression of phase fluctuations and larger coherence of the emitted light. On the other hand, amplitude fluctuations and the second-order autocorrelation function are moderately increased at the same time.
dc.description.sponsorshipEuropean Union’s Horizon 2020 research and innovation programme under grant agreement No 732894 (FET Proactive HOT), Royal Society (University Research Fellowship), Winton Programme for the Physics of Sustainability
dc.rightsAll rights reserved
dc.rights.uri
dc.titleLong-lived elementary excitations and light coherence in topological lasersen
dc.typeArticle
prism.publicationNameOpticaen
dc.identifier.doi10.17863/CAM.55429
dcterms.dateAccepted2020-07-21en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-07-21en
dc.contributor.orcidZapletal, Petr [0000-0003-3957-9585]
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (732894)
cam.orpheus.counter29*
rioxxterms.freetoread.startdate2023-07-23


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