Volume 58, Number 3, May 2002
|Page(s)||415 - 421|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 August 2002|
Optical properties of crystals with spatial dispersion— Josephson plasma resonance in layered superconductors
Los Alamos National Laboratory - Los Alamos, NM 87545, USA
2 ETH Hönggerberg, Institut für Theoretische Physik - 8093 Zürich, Switzerland
Accepted: 4 February 2002
We derive the transmission coefficient, , for grazing incidence of crystals with spatial dispersion accounting for the excitation of multiple modes with different wave vectors for a given frequency ω. The generalization of the Fresnel formulas contains the refraction indices of these modes as determined by the dielectric function . Near frequencies , where the group velocity vanishes, depends also on an additional parameter determined by the crystal microstructure. The transmission T is significantly suppressed, if one of the excited modes is decaying into the crystal. We derive these features microscopically for the Josephson plasma resonance in layered superconductors.
PACS: 74.25.Gz – Optical properties / 42.25.Gy – Edge and boundary effects; reflection and refraction / 74.72.-h – High- compounds
© EDP Sciences, 2002
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