Влияние сферической наночастицы с металлической оболочкой на дезактивацию возбужденной квантовой точки

Abstract

The plasmon-exciton interaction between a spherical nanoparticle with a dielectric core and a metal shell and a quantum dot in the mode of strong or weak confinement has been theoretically investigated. The rate of nonradiative transfer of electron excitation energy from a quantum dot to a nanoparticle and the rate of spontaneous emission of a quantum dot in the presence of a nanoparticle are calculated. It is shown that at the radii of the nanoparticle core, for which the frequency of the plasmon oscillation coincides with the frequency of the electronic transition in the quantum dot, the rates of radiative and nonradiative processes increase sharply. The kinetics of energy exchange between a nanoparticle and a quantum dot has been studied, and the values of the parameters of the system under consideration, at which the kinetics has the character of damped oscillations, have been established.