研究目的
To model the dielectric function in a plasmonic quantum dot (QD) nanolaser and study the propagation constant of surface plasmon polariton (SPP) at the interface of Ag/InAs-QD structure.
研究成果
The dielectric function in the plasmonic QD nanolaser was successfully modeled, showing strong localization of SPP field at the interface due to the zero-dimensional QD structure. The propagation length of SPP in Ag/InAs-QD interface was found to be larger than in Ag/air interface, indicating lower damping in the former. The results align with experimental findings.
研究不足
The study is theoretical and computational, lacking experimental validation. The assumption of QDs as lossless may not hold in all practical scenarios.
1：Experimental Design and Method Selection:
The study involves modeling the dielectric function for a plasmonic QD nanolaser using a metal/semiconductor/metal structure. Theoretical models include the Drude model for metal dielectric function and calculations for QD susceptibility.
2：Sample Selection and Data Sources:
The structure considered includes silver (Ag) metal, InAs QD grown on a wetting layer (WL) surrounded by a GaAs barrier.
3：List of Experimental Equipment and Materials:
The study is computational, utilizing Matlab for calculations.
4：Experimental Procedures and Operational Workflow:
The dielectric function is calculated for both metal and QD structure, followed by the calculation of SPP propagation constant and dispersion relation.
5：Data Analysis Methods:
The analysis involves evaluating the real and imaginary parts of the dielectric function, propagation length of SPP, and skin depth.
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