Ultranarrow electroluminescence spectrum from the ground state of an ensemble of self-organized quantum dots
作者:
D. L. Huffaker,
L. A. Graham,
D. G. Deppe,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 72,
issue 2
页码: 214-216
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.120689
出版商: AIP
数据来源: AIP
摘要:
Data are presented on the electroluminescence from an ensemble of self-organized quantum dots excited at low current densities. The ensemble contains∼105dots, which produce a ground state spectral emission with a 14 K linewidth of ∼1 meV at low current density(∼5×10−2A/cm2).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 state filling, even for the lowest current densities studied. ©1998 American Institute of Physics.
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