Modeling of dielectric function in plasmonic quantum dot nanolaser

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...

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Bibliographic Details
Published in:Optical and quantum electronics 2019-12, Vol.51 (12), p.1-13, Article 396
Main Authors: Jabir, Jamal N., Ameen, S. M. M., Al-Khursan, Amin Habbeb
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Computer Communication Networks
Damping
DIELECTRIC MATERIALS
Dielectrics
DIFFUSION BARRIERS
DISPERSION RELATIONS
DISPERSIONS
Electrical Engineering
INDIUM ARSENIDES
INTERFACES
Lasers
LAYERS
METALS
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
PLASMA
PLASMONS
Polaritons
POLARONS
Propagation
QUANTUM DOTS
RESOLUTION
SENSITIVITY
Silver
SIMULATION
Wetting
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Summary: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.
ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-019-2117-0