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DOE OSTI · 22950037

Modeling of dielectric function in plasmonic quantum dot nanolaser

Jabir, Jamal N.·Ameen, S. M. M.
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Abstract

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{sub spp}) also support this. According to the L{sub 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.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSDIELECTRIC MATERIALSDIFFUSION BARRIERSDISPERSION RELATIONSDISPERSIONSINDIUM ARSENIDESINTERFACESLAYERSMETALSPLASMAPLASMONSPOLARONSQUANTUM DOTSRESOLUTIONSENSITIVITYSIMULATION

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Jabir, Jamal N., Ameen, S. M. M.. 2019-12-15. Modeling of dielectric function in plasmonic quantum dot nanolaser. https://doi.org/10.1007/s11082-019-2117-0

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