Abstract:
A theory is developed for the relaxation of two-dimensional non-radiative (Coulomb) plasmon-excitons in thin closely located layers of a metal and a semiconductor. In the framework of classical electrodynamics, the equations of motion are formulated for the polarization waves of non-radiative plasmons and excitons with taking into account the Coulomb coupling and the near-field of external polarization. In the model of coupled harmonic oscillators represented by the polarization fields of excitations, the problem of relaxation is solved for Coulomb plasmons, excitons and plasmon-excitons. It is shown that the two dispersion branches of normal plasmon-exciton modes undergo anticrossing (mutual repulsion) at the resonance between plasmon and exciton. With dissipative damping and power interchange between the excitations taken into account, the process of plasmon-exciton relaxation depending on time is investigated. The theory displays the principal analogies between dynamics of plasmon-excitons and of excitations in other objects of linear vibration theory, such as mechanical oscillators, resonant electric chains, etc.
\Bibitem{Kos21}
\by V.~A.~Kosobukin
\paper Two-dimensional coulomb plasmon-excitons: relaxation of excitations
\jour Fizika Tverdogo Tela
\yr 2021
\vol 63
\issue 8
\pages 1157--1164
\mathnet{http://mi.mathnet.ru/ftt8078}
\crossref{https://doi.org/10.21883/FTT.2021.08.51171.078}
\elib{https://elibrary.ru/item.asp?id=46345449}
\transl
\jour Phys. Solid State
\yr 2021
\vol 63
\issue 8
\pages 1228--1236
\crossref{https://doi.org/10.1134/S1063783421080163}
Linking options:
https://www.mathnet.ru/eng/ftt8078
https://www.mathnet.ru/eng/ftt/v63/i8/p1157
This publication is cited in the following 1 articles:
Viktor P. Afanas'ev, Lydia G. Lobanova, “Emission of Longitudinal Photons During the Decay of Plasma Excitations in Solids”, L&E, 2024, no. 06-2024, 55