Polarization bremsstrahlung of fast electrons on metal nanospheres in a dielectric matrix in view of plasmon interference effects

The paper is devoted to the theoretical analysis of polarization bremsstrahlung (PB) [1] due to scattering of fast electrons by a metal nanosphere embedded in a dielectric matrix in a frequency region in the vicinity of dipole and quadrupole plasmon resonances. Here we take into account plasmon inte...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-07, Vol.732 (1), p.12025
Main Authors: Astapenko, V A, Sakhno, S V, Krotov, Yu A
Format: Article
Language:English
Subjects:
Angular distribution
Bremsstrahlung
Dipoles
Electrons
Interference
Metal particles
Mie scattering
Nanospheres
Photons
Physics
Polarization
Quadrupoles
Radiation
Spectral emittance
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Summary:The paper is devoted to the theoretical analysis of polarization bremsstrahlung (PB) [1] due to scattering of fast electrons by a metal nanosphere embedded in a dielectric matrix in a frequency region in the vicinity of dipole and quadrupole plasmon resonances. Here we take into account plasmon interference effects that arise in the frequency-angular distribution of PB. These effects are a consequence of interrelation between contributions to PBs due to a plasmon on the sphere surface of different multipolarity. Our approach is based on the Fermi method of equivalent photons [2] and the Mie theory of radiation scattering by small metal particles [3]. It is shown that taking into account plasmon interference in the PB differential cross-section results in specific features in the spectral distribution of an emitted photon that depend strongly on the radiation angle and nanosphere radius.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/732/1/012025