Two-dimensional nonradiative plasmon-excitons, their pulse near-field excitation and relaxation
Kosobukin V. A.
1
1Ioffe Institute, St. Petersburg, Russia
Email: Vladimir.Kosobukin@mail.ioffe.ru
A theory is presented for nonradiative plasmon-excitons propagating in atomically thin metal and semiconductor layers placed nearby. For the waves of dielectric polarization of two-dimensional plasmon-excitons, the equations of motion are derived in the form to be characteristic of damped coupled oscillators excited by an external dipole. The obtained dispersion relations and optical spectra reveal the presence of pronounced anticrossing effect in the range of plasmon-exciton resonance. The transient regimes in exciting 2D plasmon-excitons by a pulse of near field and in their relaxation are discussed in terms of forced and concomitant damped oscillations with the beats. Keywords: plasmon-excitons, polarization waves, near-field optics, pulse excitation, relaxation.
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