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    Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials

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    Manuscript_OL_waqas.pdf
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    Accepted manuscript
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    Type
    Article
    Authors
    Ahmed, Waqas Waseem
    Herrero, Ramon
    Botey, Muriel
    Wu, Ying cc
    Staliunas, Kestutis
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Applied Mathematics and Computational Science Program
    KAUST Grant Number
    BAS/1/1626-01-01
    OSR-2016-CRG5-2950
    Date
    2019-08-06
    Online Publication Date
    2019-08-06
    Print Publication Date
    2019-08-15
    Permanent link to this record
    http://hdl.handle.net/10754/656755
    
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    Abstract
    We 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.
    Citation
    Ahmed, 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
    Sponsors
    King 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).
    Publisher
    OSA - The Optical Societycustserv@osa.org
    Journal
    Optics Letters
    DOI
    10.1364/OL.44.003948
    Additional Links
    https://www.osapublishing.org/abstract.cfm?URI=ol-44-16-3948
    ae974a485f413a2113503eed53cd6c53
    10.1364/OL.44.003948
    Scopus Count
    Collections
    Articles; Applied Mathematics and Computational Science Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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