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.
Soviet Journal of Experimental and Theoretical Physics
- Pub Date:
- April 2006
- Condensed Matter - Materials Science;
- Condensed Matter - Mesoscale and Nanoscale Physics
- 20 pages,14 figures