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ISSN Druckformat: 0040-2508
ISSN Online: 1943-6009
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SURFACE STATES IN A FINE-STRATIFIED PERIODIC STRUCTURE IN A MAGNETIC FIELD
ABSTRAKT
The problem of the surface electromagnetic waves localized at the interface between vacuum and fine-stratified periodic semiconductor-dielectric structure in an external magnetic field is studied. Such a structure is defined as a biaxial crystal with effective components of permittivity which depend both on physical parameters of the structure and on geometrical parameters. The dispersion equation is derived for the system under consideration. It has been shown, that surface polaritons in such structures exist above and below the plasma frequency. Besides, owing to the specificity of the fine-stratified structure, the regions of existence of surface waves can be divided by convention into areas of strong and weak anisotropy. The characteristic frequencies and the magnitudes of external magnetic fields, at which there is a significant change in the characteristics of surface polaritons, are derived. The possibility for effective controlling the frequencies of the surface states by means of the external magnetic field, the thickness of the layers and the period of the structure has been shown.