Jj. Shi et Sh. Pan, SURFACE AND INTERFACE OPTICAL-PHONON MODES IN A FINITE 4-LAYER HETEROSTRUCTURE OF POLAR CRYSTALS, Communications in Theoretical Physics, 24(3), 1995, pp. 291-298
The dispersion relation and eigenvector for the surface and interface
optical-phonon modes in a finite four-layer heterostructure of polar c
rystals have been derived by using the dielectric continuum model. Mor
eover, as practical examples, the dispersion relations for some intere
sting structures such as finite and semi-infinite step quantum wells a
nd a semi-infinite single quantum well are given for the first time.