POLAR OPTICAL VIBRATIONAL-MODES IN QUANTUM DOTS

被引：213

作者：

ROCA, E ^{[1
]}

TRALLEROGINER, C ^{[1
]}

CARDONA, M ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH, D-70569 STUTTGART, GERMANY

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.49.13704

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A macroscopic continuum model coupling the mechanical vibrational amplitude and electrostatic potential is applied to obtain the optical vibrational modes in quantum-dot structures. A unified method of solution (valid for any type of nanostructure) that reduces the four coupled second-order differential equations to Helmholtz's and Laplace's equations is described. Analytical solutions for the vibrational amplitude and the Frohlich-type electron-phonon interaction are given for quantum dots with spherical geometry. The existence of surface modes and their relation to the matching boundary conditions are studied. A qualitative discussion of the ir and Raman activity of the calculated modes is given together with a comparison with the few existing experimental data.

引用

页码：13704 / 13711

页数：8

共 31 条

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