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dc.contributor.authorAhmed, Waqas Waseem
dc.contributor.authorHerrero, Ramon
dc.contributor.authorBotey, Muriel
dc.contributor.authorWu, Ying
dc.contributor.authorStaliunas, Kestutis
dc.date.accessioned2019-09-15T12:56:50Z
dc.date.available2019-09-15T12:56:50Z
dc.date.issued2019-08-06
dc.identifier.citationAhmed, W. W., Herrero, R., Botey, M., Wu, Y., & Staliunas, K. (2019). Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials. Optics Letters, 44(16), 3948. doi:10.1364/ol.44.003948
dc.identifier.doi10.1364/OL.44.003948
dc.identifier.urihttp://hdl.handle.net/10754/656755
dc.description.abstractWe propose a novel physical mechanism based on periodic non-Hermitian potentials to efficiently control the complex spatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), achieving a stable emission of maximum brightness. A radially dephased periodic refractive index and gain-loss modulations accumulate the generated light from the entire active layer and concentrate it around the structure axis to emit narrow, bright beams. The effect is due to asymmetric inward radial coupling between transverse wave vectors for particular phase differences of the refractive index and gain-loss modulations. Light is confined into a central beam with large intensity, opening the path to design compact, bright, and efficient broad-area light sources. We perform a comprehensive analysis to explore the maximum central intensity enhancement and concentration regimes. This Letter reveals that the optimum schemes are those holding unidirectional inward coupling, but not fulfilling a perfect local PT-symmetry.
dc.description.sponsorshipKing Abdullah University of Science and Technology (KAUST) (BAS/1/1626-01-01, OSR-2016-CRG5-2950); Spanish Ministerio de Economía y Competitividad (MINECO) (FIS2015-65998-C2-1-P); European Union Horizon 2020 Framework Programme (H2020) EUROSTARS (E10524 HIP-Laser).
dc.publisherThe Optical Society
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=ol-44-16-3948
dc.rightsArchived with thanks to Optics Letters
dc.titleRegularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.identifier.journalOptics Letters
dc.eprint.versionPost-print
dc.contributor.institutionDepartament de Física, Universitat Politècnica de Catalunya (UPC), Colom 11, E-08222, Terrassa, Barcelona, Spain
dc.contributor.institutionInstitució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, E-08010, Barcelona, Spain
kaust.personAhmed, Waqas Waseem
kaust.personWu, Ying
kaust.grant.numberBAS/1/1626-01-01
kaust.grant.numberOSR-2016-CRG5-2950
refterms.dateFOA2019-09-16T05:12:15Z
kaust.acknowledged.supportUnitOSR
dc.date.published-online2019-08-06
dc.date.published-print2019-08-15


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