Absorption of radiation by small metallic particles: a general self-consistent approach

M. Wilkinson, B. Mehlig

Research output: Contribution to journalArticle

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Abstract

Calculations of low-frequency absorption of electromagnetic radiation by small conducting particles must take account of screening of the externally applied field due to polarization charges. In this paper we introduce a 'semiclassical' variant of the random-phase-approximation (RPA) method for obtaining the self-consistent field. Electric and magnetic dipole absorption are treated within a unified scheme, and we also demonstrate the equivalence of this approach to a superficially dissimilar perturbative method. The approach is more tractable than the full RPA equations, and allows us to discuss the effective potential for both diffusive and ballistic electron dynamics.
Original languageEnglish
Pages (from-to)10481-10498
Number of pages17
JournalJournal of Physics: Condensed Matter
Volume12
Issue number50
DOIs
Publication statusPublished - 18 Dec 2000

Fingerprint

Ballistics
Electromagnetic waves
Screening
Polarization
Radiation
Electrons
radiation
approximation
magnetic dipoles
ballistics
electric dipoles
self consistent fields
equivalence
electromagnetic radiation
screening
low frequencies
conduction
polarization
electrons

Keywords

  • electromagnetic radiation
  • polarization
  • magnetic dipole absorption
  • ballistic electron dynamics

Cite this

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abstract = "Calculations of low-frequency absorption of electromagnetic radiation by small conducting particles must take account of screening of the externally applied field due to polarization charges. In this paper we introduce a 'semiclassical' variant of the random-phase-approximation (RPA) method for obtaining the self-consistent field. Electric and magnetic dipole absorption are treated within a unified scheme, and we also demonstrate the equivalence of this approach to a superficially dissimilar perturbative method. The approach is more tractable than the full RPA equations, and allows us to discuss the effective potential for both diffusive and ballistic electron dynamics.",
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Absorption of radiation by small metallic particles: a general self-consistent approach. / Wilkinson, M.; Mehlig, B.

In: Journal of Physics: Condensed Matter, Vol. 12, No. 50, 18.12.2000, p. 10481-10498.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Absorption of radiation by small metallic particles: a general self-consistent approach

AU - Wilkinson, M.

AU - Mehlig, B.

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PY - 2000/12/18

Y1 - 2000/12/18

N2 - Calculations of low-frequency absorption of electromagnetic radiation by small conducting particles must take account of screening of the externally applied field due to polarization charges. In this paper we introduce a 'semiclassical' variant of the random-phase-approximation (RPA) method for obtaining the self-consistent field. Electric and magnetic dipole absorption are treated within a unified scheme, and we also demonstrate the equivalence of this approach to a superficially dissimilar perturbative method. The approach is more tractable than the full RPA equations, and allows us to discuss the effective potential for both diffusive and ballistic electron dynamics.

AB - Calculations of low-frequency absorption of electromagnetic radiation by small conducting particles must take account of screening of the externally applied field due to polarization charges. In this paper we introduce a 'semiclassical' variant of the random-phase-approximation (RPA) method for obtaining the self-consistent field. Electric and magnetic dipole absorption are treated within a unified scheme, and we also demonstrate the equivalence of this approach to a superficially dissimilar perturbative method. The approach is more tractable than the full RPA equations, and allows us to discuss the effective potential for both diffusive and ballistic electron dynamics.

KW - electromagnetic radiation

KW - polarization

KW - magnetic dipole absorption

KW - ballistic electron dynamics

UR - http://dx.doi.org/10.1088/0953-8984/12/50/310

UR - http://arxiv.org/abs/physics/9907036

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