Open AccessКулоновские плазмон-экситоны в планарных наноструктурах металл-полупроводник
Author(s) -
В.А. Кособукин
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.04.50720.248
Subject(s) - exciton , plasmon , coulomb , condensed matter physics , physics , quasiparticle , polarization (electrochemistry) , localized surface plasmon , biexciton , surface plasmon , surface plasmon resonance , resonance (particle physics) , dipole , atomic physics , quantum mechanics , chemistry , electron , superconductivity , nanoparticle
A theory of Coulomb (non-radiative) plasmons-excitons in a semiconductor with adjacent quantum well and ultrathin metal film is presented. The equations of motion are formulated for the polarization waves of surface plasmons and quasi-two-dimensional excitons with taking account of Coulomb interaction between them. Within a model of coupled harmonic oscillators, solved are the problems of Coulomb plasmon, exciton and plasmon-exciton excitations in the presence of an external dipole force. The coupling contant is calculated for plasmon-excitons, their optical spectra are investigated, and the relative contributions of plasmons and excitons to the normal modes are found. It is concluded that near the resonance between plasmon and exciton the spectrum of plasmon-exciton excitations consists of two peaks whose behavior in passing through the resonance shows the signs of anti-crossing effect (repulsion of frequencies).