Visible photoluminescence from Ge quantum dots
Journal
Physica E: Low-Dimensional Systems and Nanostructures
Journal Volume
28
Journal Issue
4
Pages
525-530
Date Issued
2005
Author(s)
Abstract
Spectroscopic analyses on stacked Ge quantum dots (QDs) on Si (1 0 0) substrates are presented. Strong and visible photoluminescence around 620 nm from stacked Ge QDs is observed. The luminescence is intense and clearly visible to the naked eye at both room temperature and low temperature. We have investigated the temperature dependence of the luminescence, as well as the composition of Ge dots via transmission electron microscopy and the Raman spectroscopy. Possible causes of the visible luminescence are also speculated in this report. © 2005 Elsevier B.V. All rights reserved.
Type
journal article