Ultranarrow electroluminescence spectrum from the ground state of an ensemble of self-organized quantum dots

被引：21

作者：

Huffaker, DL ^{[1
]}

Graham, LA ^{[1
]}

Deppe, DG ^{[1
]}

机构：

[1] Univ Texas, Dept Elect & Comp Engn, Microelect Res Ctr, Austin, TX 78712 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 02期

关键词：

D O I：

10.1063/1.120689

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Data are presented on the electroluminescence from an ensemble of self-organized quantum dots excited at low current densities. The ensemble contains similar to 10(5) dots, which produce a ground state spectral emission with a 14 K linewidth of similar to 1 meV at low current density (similar to 5x10(-2) A/cm(2)). While the spectra show clearly discrete energy levels, we suggest that obtaining a single ground state emission from the ensemble may be due to interdot electronic coupling. Spectral broadening decreases for decreasing current density due to electronic slate filling, even for the lowest current densities studied. (C) 1998 American Institute of Physics.

引用

页码：214 / 216

页数：3

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