PLASMON MODE FEATURES IN PbSe-BASED FREE-STANDING SEMICONDUCTOR QUANTUM WIRES

Abstract

The features of the dispersion spectrum of quasi-dimensional plasmon modes in free-standing PbSe based quantum wires in the presence of strong dielectric mismatch are discussed. It is shown that in such a nanosystem, in addition to plasmonic intraband oscillations at the long wave limit, alternative long wave related oscillations can occur, the frequency of which does not depend on the wave vector and simultaneously increases with decreasing the wire thickness. The numerical analysis of the allowed plasmon spectral characteristic range is performed.