Optical Resonances in Reflectivity near Crystal Modes with Spatial Dispersion

Abstract

We study the effect of spatial dispersion of crystal modes on optical properties such as the reflectivity $R$. As an example for isotropic media, we investigate the simplest model for phonons in ionic crystals and compare with previous results for highly anisotropic plasmons, which are now understood from a more general point of view. As a consequence of the wave vector dependence of the dielectric function small changes in the lineshape are predicted. Beyond that, if the frequency of minimal $R$ is near a pole of the dispersionless dielectric function, the relative amplitude of dips in $R$ with normal and anomalous dispersion differ significantly, if dissipation and disorder are low.

4 pages, 7 eps figures, minor changes

References in corpus (4)

• Optical Properties of Layered Superconductors near the Josephson Plasma Resonance
• Reflectivity and Microwave Absorption in Crystals with Alternating Intrinsic Josephson Junctions
• Optical Properties of Crystals with Spatial Dispersion: Josephson Plasma Resonance in Layered Superconductors
• Field Dependence of the Josephson Plasma Resonance in Layered Superconductors with Alternating Junctions

Cited by in corpus (3)

• Electromagnetic properties of viscous charged fluids
• Observation of polaritons in Bi2Sr2CaCu2O8+x single crystals
• Electronic compressibility and charge imbalance relaxation in cuprate superconductors