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    Non-Hermitian Broad Aperture Semiconductor Lasers Based on PT-Symmetry

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    ICTON19botey.pdf
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    Type
    Conference Paper
    Authors
    Botey, Muriel
    Ahmed, Waqas Waseem
    Medina, Judit
    Herrero, Ramon
    Staliunas, Kestutis
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    KAUST Grant Number
    BAS/1/1626-01-01
    Date
    2019-09-20
    Online Publication Date
    2019-09-20
    Print Publication Date
    2019-07
    Permanent link to this record
    http://hdl.handle.net/10754/658664
    
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    Abstract
    In this paper we propose a novel configuration to regularize the complex spatiotemporal dynamics of broad area lasers into bright light beam. It has recently been shown that arbitrary non-Hermitian optical potentials based on local Parity-Time (PT-) symmetry may tailor and control the flow of light, due to the asymmetric mode coupling. We now provide a comprehensive analysis on how this can be applied to stabilize the emission from broad aperture semiconductor lasers. The mechanism relies on a non-Hermitian configuration of the laser potential achieved by simultaneous spatial modulation of the refractive index and gain-loss profiles. This allows concentrating the light into a bright and narrow output beam. We provide a numerical analysis on Vertical Cavity Surface Emitting lasers and Broad Area Semiconductor Lasers. The results indicate a significant intensity enhancement and concentration of the emitted stabilized beam. The proposed mechanism may be technologically achievable, and it is expected to be applicable to regularize the radiation of other broad aperture and microlasers, which typically emit quite random and irregular light patterns. Besides, the reported concentration effect is universal, and could be extended to random and quasi-periodic background potentials.
    Citation
    Botey, M., Ahmed, W. W., Medina, J., Herrero, R., & Staliunas, K. (2019). Non-Hermitian Broad Aperture Semiconductor Lasers Based on PT-Symmetry. 2019 21st International Conference on Transparent Optical Networks (ICTON). doi:10.1109/icton.2019.8840291
    Sponsors
    King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR-2016- CRG5-2950); KAUST Baseline Research Fund (BAS/1/1626-01-01); Spanish Ministerio de Economía y Competitividad (FIS2015-65998-C2-1-P); European Union Horizon 2020 Framework EUROSTARS (E10524 HIP-Laser).
    Publisher
    IEEE
    Conference/Event name
    21st International Conference on Transparent Optical Networks, ICTON 2019
    DOI
    10.1109/icton.2019.8840291
    Additional Links
    https://ieeexplore.ieee.org/document/8840291/
    https://upcommons.upc.edu/bitstream/2117/178305/3/ICTON19botey.pdf
    ae974a485f413a2113503eed53cd6c53
    10.1109/icton.2019.8840291
    Scopus Count
    Collections
    Conference Papers; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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