Micro-photoluminescence spectroscopy of hierarchically self-assembled quantum 
dots

Rastelli, A.; Kiravittaya, S.; Wang, L.; Bauer, C.; Schmidt, O. G.

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Micro-photoluminescence spectroscopy of hierarchically self-assembled quantum dots

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Rastelli, A.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Kiravittaya, S.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Wang, L.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Bauer, C.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Schmidt, O. G.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Rastelli, A., Kiravittaya, S., Wang, L., Bauer, C., & Schmidt, O. G. (2006). Micro-photoluminescence spectroscopy of hierarchically self-assembled quantum dots. Physica E, 32(1-2), 29-32.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FB13-2

Abstract

Novel, self-assembled quantum dot (QD) structures suitable for
single-dot optical spectroscopy are fabricated by combining III-V
molecular beam epitaxy and in situ, atomic layer precise etching.
Several growth and etching steps are used to produce lateral InAs/GaAs
QD bimolecules and unstrained GaAs/AlGaAs QDs with low surface density
(less than or similar to 10(8) cm(-2)). Micro-photoluminescence is used
to investigate the ensemble and single-QD properties of GaAs QDs.
Single-QD spectra show resolution-limited sharp lines at low excitation
and broad "shell-structures" at high excitation intensity. (c) 2006
Elsevier B.V. All rights reserved.