Infrared absorption and Raman scattering on coupled plasmon--phonon modes in superlattices

Details Infrared absorption and Raman scattering on coupled plasmon--phonon modes in superlattices Infrared absorption and Raman scattering on coupled plasmon--phonon modes in superlattices

2005-10-28

arxiv.org/abs/cond-mat/0510784v1

Journal of Experimental and Theoretical Physics, Vol. 102, No. 4, pp. 661-670 (2006)

Physics

Condensed Matter

Materials Science

20 pages,14 figures

Scientific paper

10.1134/S1063776106040169

We consider theoretically a superlattice formed by thin conducting layers separated spatially between insulating layers. The dispersion of two coupled phonon-plasmon modes of the system is analyzed by using Maxwell's equations, with the influence of retardation included. Both transmission for the finite plate as well as absorption for the semi-infinite superlattice in the infrared are calculated. Reflectance minima are determined by the longitudinal and transverse phonon frequencies in the insulating layers and by the density-state singularities of the coupled modes. We evaluate also the Raman cross section from the semi-infinite superlattice.

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