4–9 Jun 2023
Hotel Corallo, Riccione
Europe/Rome timezone

Radiation of Surface Polaritons in Cylindrical Channels

6 Jun 2023, 12:20
20m

Speaker

Vardazar Kotanjyan

Description

We investigate the radiation of surface polaritons by a charged particle
moving parallel to the axis of a dielectric cylinder immersed in homogeneous
medium. Both the cases of the charge motion inside and outside the
cylinder are discussed. The electromagnetic fields in the exterior
and interior media are evaluated by using the Green tensor. The parts
in the fields corresponding to surface polaritons localized near the
cylindrical interface are extracted explicitly. By using those fields
the energy fluxes inside and outside the cylinder are studied for
general case of the dispersion of the active medium with negative
dielectric permittivity. The general results are specified for the
Drude model of dispersion. The total energy losses of the charged
particle are investigated as well. The corresponding results are compared
with the energy losses on guiding modes of the dielectric cylinder.

The work was partially supported by the Science Committee of RA, in
the frames of the research project 21AG-1C069 and the
PhD support program 22AA-1C002.

Primary authors

Anna Kotanjyan (Yerevan State University) Aram Saharian (Yerevan State University, Yerevan, Armenia) Vardazar Kotanjyan Hrant Khachatryan (Institute of Applied Problems in Physics) Levon Grigoryan (Institute of Applied Problems in Physics)

Presentation materials