INFLUENCE OF EXCITON DIFFUSION AND LOCALIZATION ON CATHODOLUMINESCENCE IMAGING OF QUANTUM-WELL STRUCTURES

被引：13

作者：

JAHN, U ^{[1
]}

FUJIWARA, K ^{[1
]}

MENNIGER, J ^{[1
]}

HEY, R ^{[1
]}

GRAHN, HT ^{[1
]}

机构：

[1] KYUSHU INST TECHNOL,KITAKYUSHU 804,FUKUOKA,JAPAN

来源：

JOURNAL OF APPLIED PHYSICS | 1995年 / 77卷 / 03期

关键词：

D O I：

10.1063/1.358988

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of exciton diffusion and localization on the cathodoluminescence (CL) intensity distribution using a scanning electron microscope has been investigated in a single quantum well and a multiple quantum well structure prepared by growth interrupted molecular beam epitaxy. Although of different origin, lateral variations of the exciton confinement energy occur in both samples on a length scale much larger than the exciton Bohr radius. The spectral and spatial CL intensity distribution is substantially influenced by diffusion of excitons to quantum well regions with low exciton confinement energy. The CL micrographs from both quantum well structures exhibit a similar bright/dark pattern with a typical length scale, which is determined by the exciton diffusion length in this material. © 1995 American Institute of Physics.

引用

页码：1211 / 1216

页数：6

共 17 条

[1] CATHODOLUMINESCENCE ATOMIC SCALE IMAGES OF MONOLAYER ISLANDS AT GAAS/GAALAS INTERFACES [J].