OPTICAL VIBRATION MODES IN SPHERICAL CORE-SHELL QUANTUM DOTS

被引：4
|
作者：
Xing, Y. [1 ]
Liang, X. X.
Wang, Z. P.
机构：
[1] Inner Mongolia Univ, Dept Phys, Hohhot 010021, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2013年 / 27卷 / 18期
关键词：
Optical vibration mode; electron-phonon interaction; core-shell quantum dots; BOUND POLARON; NANOCRYSTALS; CDSE; WIRE;
D O I：
10.1142/S0217984913501340
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using a dielectric continuum approach, the optical vibration modes in a spherical core-shell quantum dots (QDs) imbedded in a host nonpolar material are studied. The dispersion relation and the corresponding electron-phonon interaction Hamiltonian are derived. The numerical calculations for the CdSe/ZnS system are performed. The results reveal that there are three branches frequencies of interface/surface optical phonon in the system. A detailed discussion of the combined effects of the spatial confinement and dielectric mismatch between the dot and the host medium is given.
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页数：9
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