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Theory of Surface Polariton Excitation by Charged Particles in a Layer with Account of Retardation
Author(s) -
Arakelian V. H.,
Bagdassarian L. A.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221560127
Subject(s) - polariton , excitation , excited state , surface (topology) , surface plasmon polariton , surface phonon , phonon , charged particle , physics , condensed matter physics , plasmon , surface wave , layer (electronics) , surface plasmon , atomic physics , molecular physics , materials science , quantum mechanics , optics , mathematics , ion , geometry , nanotechnology
Surface electromagnetic waves or surface polariton (SP) excitations are considered in material layer by means of moving charged particles. A general theory of the problem is given (including retardation) without any limitations for its parameters. Compact expressions for the energy spectrum of the two possible SP branches are obtained, as well as a number of calculation curves for surface phonon‐polaritons and surface plasmons. Certain particular cases of the problem are considered. SP excitation with high phase velocities is treated in detail. SP are shown to be intensively excited only at those frequencies for which ‐1 ⪅ ε (ω) < 0.