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On the Origin of the Optical Emission Peak Shifts in QD Superlattices
Author(s) -
Petitprez E.,
Marega E.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200207)232:1<164::aid-pssb164>3.0.co;2-q
Subject(s) - photoluminescence , superlattice , quantum dot , materials science , transmission electron microscopy , relaxation (psychology) , condensed matter physics , coupling (piping) , electron , work (physics) , molecular physics , optoelectronics , nanotechnology , physics , quantum mechanics , composite material , psychology , social psychology
In this work attention is focused on the photoluminescence peak position variation of vertically aligned self‐assembled InAs quantum dots as a function of the vertical spacer layer separation. Using a simple model it is possible to reproduce the observed photoluminescence peak behavior, even for unexpected features. Such a model is based on experimental transmission electron microscopy results and on a reduced number of physical phenomena, namely quantum dot dimensions, strain relaxation, electronic coupling and structural defect formation.