International Conference Physics.SPb/2024, October 21-25, 2024, St. Petersburg

Two-dimensional nonradiative plasmon-excitons, their near-field pulse excitation and relaxation

V. A. Kosobukin

Ioffe Institute, 194021 St. Petersburg, Russia

Abstract: A theory is presented for non-radiative 2D plasmon-excitons propagating in atomically thin metallic and semiconducting layers placed nearby. For the waves of dielectric polarization of plasmon-excitons, the equations of motion are derived in the form characteristic of damped coupled oscillators excited by an external dipole force. The obtained dispersion relations and optical spectra reveal the presence of pronounced anti-crossing effect in the region of plasmon-exciton resonance. The transition regimes of near-field pulse excitating 2D plasmon-excitons and of their relaxation are discussed in terms of forced and damped concomitant oscillations undergone the beats.

Keywords: plasmon-excitons, polarization waves, near-field optics, pulse excitation, relaxation.

Received: 30.04.2024
Revised: 26.06.2024
Accepted: 30.10.2024

DOI: 10.61011/FTP.2024.10.59380.6474A

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