Absorption in dipole-lattice models of dielectrics
| Autor: | Thomas G. Philbin, R. J. Churchill |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Permittivity
Physics Condensed matter physics FOS: Physical sciences Physics::Optics Dielectric 01 natural sciences Electromagnetic radiation 010305 fluids & plasmas Dipole Polarizability Lattice (order) 0103 physical sciences Wave vector 010306 general physics Artificial dielectrics Optics (physics.optics) Physics - Optics |
| Popis: | 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 pseudo-reservoir, 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 wavevector dependence of the permittivity. 13 pages, 9 figures; references added to section 1 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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