Absorption in dipole-lattice models of dielectrics
Philbin, TG; Churchill, RJ
Date: 5 May 2016
Article
Journal
Physical Review A: Atomic, Molecular and Optical Physics
Publisher
American Physical Society
Publisher DOI
Abstract
We develop a classical microscopic model of a dielectric. The model features nonlinear interaction terms between polarizable dipoles and lattice vibrations. The lattice vibrations are found to act as a pseudoreservoir, giving broadband absorption of electromagnetic radiation without the addition of damping terms in the dynamics. The ...
We develop a classical microscopic model of a dielectric. The model features nonlinear interaction terms between polarizable dipoles and lattice vibrations. The lattice vibrations are found to act as a pseudoreservoir, giving broadband absorption of electromagnetic radiation without the addition of damping terms in the dynamics. The effective permittivity is calculated using a perturbative iteration method and is found to have the form associated with real dielectrics. Spatial dispersion is naturally included in the model and we also calculate the wave vector dependence of the permittivity.
Physics and Astronomy
Faculty of Environment, Science and Economy
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