Now showing items 1-6 of 6

    • Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity 

      Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2020-08)
      Research report
      Open Access
      We propose a general design strategy based on genetic optimization to realize asymmetric reflectivity in periodic and non-periodic planar structures containing dielectric and gain-loss layers. By means of an optimization ...
    • Inverse-design of non-Hermitian potentials for on-demand asymmetric reflectivity 

      Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2021-05-24)
      Article
      Open Access
      We propose a genetic algorithm-assisted inverse design approach to achieve ‘ondemand’ light transport in periodic and non-periodic planar structures containing dielectric and gain-loss layers. The optimization algorithm ...
    • Machine learning for knowledge acquisition and accelerated inverse-design for non-Hermitian systems 

      Ahmed, Waqas W.; Farhat, Mohamed; Staliunas, Kestutis; Zhang, Xiangliang; Wu, Ying (2023-12-01)
      Article
      Open Access
      Non-Hermitian systems offer new platforms for unusual physical properties that can be flexibly manipulated by redistribution of the real and imaginary parts of refractive indices, whose presence breaks conventional wave ...
    • Regularization of broad-area lasers by non-Hermitian potentials 

      Botey Cumella, Muriel; Ahmed Waseem, Waqas Waseem; Medina, Judith; Herrero Simon, Ramon; Wu, Ying; Staliunas, Kestutis (2019)
      Conference report
      Open Access
      It was recently shown that arbitrary non-Hermitian optical potentials based on local Parity-Time (PT-) symmetry may control the flow of light, due to the asymmetric mode coupling. We propose periodic non-Hermitian potentials ...
    • Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials 

      Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2019-08-15)
      Article
      Open Access
      We propose a novel physical mechanism based on periodicnon-Hermitian potentials to efficiently control the complexspatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), ...
    • Restricted Hilbert Transform for Non-Hermitian Management of Fields 

      Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2020-10-07)
      Article
      Open Access
      Non-Hermitian systems exploiting the synergy between the properties of closed-conservative systems and open-dissipative (gain-loss) systems have recently become the playground to uncover unusual physical phenomena. Indeed, ...