Open AccessSURFACE AND INTERFACE OPTICAL-PHONON MODES IN A FOUR-LAYER HETEROSTRUCTURE
Author(s) -
Junjie Shi,
Pan Shao-Hua
Publication year - 1994
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.43.790
Subject(s) - heterojunction , phonon , dispersion relation , condensed matter physics , slab , dielectric , finite thickness , surface phonon , materials science , formalism (music) , bilayer , physics , optoelectronics , mechanics , chemistry , art , musical , biochemistry , membrane , geophysics , visual arts
We have used the dielectric-continuum model to study the surface and interface optical-phonon modes in a four-layer heterostructure with finite thickness. The eige-nvectors, the dispersion relation and the interface charge densities are obtained. All the previous results for a dielectric slab, bilayer, trilayer and infinite four-layer he-terostructures can be reded-iced from our general relation for a finite four-layer he-terostructure. The dispersion relations and their numerical illustration for some inte-resting and practical structures such as a finite step-quantum-well are also given. This work can be regarded as a generalization of the formalism in reference [8].