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Luminescence of a complex composed of a quantum dot and a layered plasmon nanoparticle in a magnetic field

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Abstract

This paper discusses the characteristics of the electric field inside and outside an electronically excited quantum dot. It shows that the electric potential behaves differently during strong and weak confinement of an electron–hole pair. Based on a specially created theoretical model, the luminescence spectra and the nonradiative energy-transfer rates from an exciton-activated quantum dot to a layered nanoparticle in an external magnetic field, as well as the magnetic induction, are calculated as a function of the geometric and polarization parameters of the system. Two different cases of the combination of the composite nanoparticle’s core and casing materials—metal/dielectric and dielectric/metal—are considered. It is shown that the magnetization of the electron plasma of the metallic part of the nanocomposite in an external magnetic field causes the luminescence spectra of the quantum-dot–layered-nanoparticle complex to vary, expressed as splitting of the plasmon-resonance bands.

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