Absorption in dipole-lattice models of dielectrics
Physical Review A: Atomic, Molecular and Optical Physics
American Physical Society
This is the author accepted manuscript. The final version is available from American Physical Society via the DOI in this record.
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.
We acknowledge financial support from EPSRC under Program Grant EP/I034548/1.
Vol. 93, pp. 053809 - 053809