MAGNETIC-FIELD-INDUCED PLASMON POLARITONS IN FINITE QUASI-PERIODIC CONDUCTING SUPERLATTICES

We consider the effects of an external magnetic field on the plasmon p olaritons in finite quasiperiodic superlattices consisting of alternat e degenerate semiconductor or metallic layers. The magnetic field is a pplied parallel to the interfaces. A type of magnetoplasmon polariton that is not present in the conductor-insulator-conductor configuration is discussed. The spectrum is composed of three main bands in which t he modes exhibit different localization properties. The modes at highe r frequency are extended, but those at lower frequency are critical or localized. Some surface modes have been found in the finite system.