Work

Plasmon-polariton modes on a single electron wave packet

Year: 2025

Type: article

Abstract: The explicit expression for the photon polarization operator in the presence of a single electron is found in the i n − i n formalism in the one-loop approximation out of the photon mass shell. This polarization operator describes the dielectric permittivity of a single electron wave packet in coherent scattering processes. The plasmons and plasmon-polaritons supported by a single electron wave packet are described. The two limiting cases are considered: the wavelength of the external electromagnetic field is much smaller than the typical scale of variations of the electron wave packet and the wavelength of the external electromagnetic field is much larger than the size of the electron wave packet. In the former case, there are eight independent plasmon-polariton modes. In the latter case, the plasmons boil down to the dynamical dipole moment attached to a point electron. Thus, in the infrared limit, the electron possesses a dynamical electric dipole moment manifesting itself in coherent scattering processes.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.036028

Authors: I. M. Akimov, P. O. Kazinski, A. A. Sokolov

Institutions: National Research Tomsk State University, Tomsk Polytechnic University

Language: English

Topic: Quantum and Classical Electrodynamics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Ministry of Education and Science of the Russian Federation

Award: G3710638305