Modeling of dielectric function in plasmonic quantum dot nanolaser

  • Jamal N. Jabir
  • S. M. M. Ameen
  • Amin Habbeb Al-KhursanEmail author


In this work we present a model of the dielectric function in plasmonic quantum dot (QD) nanolaser. A metal/semiconductor/metal structure was considered to attain plasmonic nanocavity with active region containing: QD, wetting layer and barrier. The dielectric function was calculated for both metal (Ag) and QD structure. The propagation constant of surface plasmon polariton (SPP) at the interface of Ag/InAs-QD structure was calculated and the dispersion relation of the plasmonic QD structure was evaluated. For frequencies far from plasma one, the gap between real and imaginary parts was large and a deviation from linear relation was obvious. The SPP field was strongly localized at the interface due to the effect of zero-dimensional QD structure which has application in the super-resolution and best sensitivity in optical imaging. Results of propagation length of SPP (\(L_{spp}\)) also support this. According to the \(L_{spp}\) results, the damping in the SPP energy was low in the Ag/InAs-QD compared to that in the Ag/air interface. The obtained results are in the range of experimental ones.


Surface plasmon polariton Ag/QD Plasmonic QD structure 



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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Jamal N. Jabir
    • 1
    • 2
    • 3
  • S. M. M. Ameen
    • 1
  • Amin Habbeb Al-Khursan
    • 2
    Email author
  1. 1.College of ScienceUniversity of BasrahBasrahIraq
  2. 2.Nassiriya Nanotechnology Research Laboratory (NNRL), Science CollegeThi-Qar UniversityNassiriyaIraq
  3. 3.Department of Physics, College of EducationUniversity of Al-QadisiyahDiwaniyahIraq

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