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 (\(L_{spp}\)) 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.
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Jabir, J.N., Ameen, S.M.M. & Al-Khursan, A.H. Modeling of dielectric function in plasmonic quantum dot nanolaser. Opt Quant Electron 51, 396 (2019). https://doi.org/10.1007/s11082-019-2117-0
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DOI: https://doi.org/10.1007/s11082-019-2117-0