EFFECT OF THE SPHERICAL NANOPARTICLE WITH A METAL SHELL ON DEACTIVATION OF THE EXCITED QUANTUM DOT

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 the quantum dot to the nanoparticle and the rate of spontaneous emission of the quantum dot in the presence of the 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 the energy exchange between the nanoparticle and the quantum dot has been studied, and values of the parameters of the system under consideration, at which the kinetics has the character of damped oscillations, have been established.