Open AccessTuning the optical performance of surface quantum dots in InGaAs/GaAs hybrid structures
Author(s) -
B. L. Liang,
Zh. M. Wang,
Yu. I. Mazur,
Sh. Seydmohamadi,
Morgan E. Ware,
Gregory J. Salamo
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.008157
Subject(s) - photoluminescence , quantum dot , materials science , optoelectronics , coupling (piping) , gallium arsenide , excitation , optics , physics , quantum mechanics , metallurgy
GaAs spacer thicknesses are varied to tune the coupling between InGaAs surface quantum dots (QDs) and multilayers of buried QDs. Temperature and excitation intensity dependence of the photoluminescence together with time resolved photoluminescence reveal that coupling between layers of QDs and consequently the optical properties of both the surface and the buried QDs significantly depend on the GaAs spacer. This work provides an experimental method to tune and control the optical performance of surface QDs.