Polarizability and Absorption of Small Conducting Particles in a Time-Varying Electromagnetic Field

Details Polarizability and Absorption of Small Conducting Particles in a Time-Varying Electromagnetic Field Polarizability and Absorption of Small Conducting Particles in a Time-Varying Electromagnetic Field

2000-09-22

arxiv.org/abs/cond-mat/0009362v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages

Scientific paper

10.1016/S0921-4526(01)00537-3

We study small conducting particles and thin films in an oscillating longitudinal electric field. We find the charge, current, and field distribution in the particle, the polarizability and the electric dipole absorption. We account for Thomas-Fermi screening by adding a Fick's diffusion term to Ohm's law. Alternatively, we describe a particle as a dielectric body with a non-local dielectric constant which is derived in a microscopic linear-response theory. We show that both approaches are equivalent.

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