Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy

S. Blumenthal, T. Rieger, D. Meertens, A. Pawlis, D. Reuter, D.J. As, Physica Status Solidi (B) 255 (2018) 1600729.

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Journal Article | Published | English
Author
Blumenthal, Sarah; Rieger, Torsten; Meertens, Doris; Pawlis, Alexander; Reuter, DirkLibreCat; As, Donat JosefLibreCat
Abstract
We have investigated the stacking of self-assembled cubic GaN quantum dots (QDs) grown in Stranski–Krastanov (SK) growth mode. The number of stacked layers is varied to compare their optical properties. The growth is in situ controlled by reflection high energy electron diffraction to prove the SK QD growth. Atomic force and transmission electron microscopy show the existence of wetting layer and QDs with a diameter of about 10 nm and a height of about 2 nm. The QDs have a truncated pyramidal form and are vertically aligned in growth direction. Photoluminescence measurements show an increase of the intensity with increasing number of stacked QD layers. Furthermore, a systematic blue-shift of 120 meV is observed with increasing number of stacked QD layers. This blueshift derives from a decrease in the QD height, because the QD height has also been the main confining dimension in our QDs.
Publishing Year
Journal Title
physica status solidi (b)
Volume
255
Issue
3
Page
1600729
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Blumenthal S, Rieger T, Meertens D, Pawlis A, Reuter D, As DJ. Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy. physica status solidi (b). 2018;255(3):1600729. doi:https://doi.org/10.1002/pssb.201600729
Blumenthal, S., Rieger, T., Meertens, D., Pawlis, A., Reuter, D., & As, D. J. (2018). Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy. Physica Status Solidi (B), 255(3), 1600729. https://doi.org/10.1002/pssb.201600729
@article{Blumenthal_Rieger_Meertens_Pawlis_Reuter_As_2018, title={Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy}, volume={255}, DOI={https://doi.org/10.1002/pssb.201600729}, number={3}, journal={physica status solidi (b)}, author={Blumenthal, Sarah and Rieger, Torsten and Meertens, Doris and Pawlis, Alexander and Reuter, Dirk and As, Donat Josef}, year={2018}, pages={1600729} }
Blumenthal, Sarah, Torsten Rieger, Doris Meertens, Alexander Pawlis, Dirk Reuter, and Donat Josef As. “Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy.” Physica Status Solidi (B) 255, no. 3 (2018): 1600729. https://doi.org/10.1002/pssb.201600729.
S. Blumenthal, T. Rieger, D. Meertens, A. Pawlis, D. Reuter, and D. J. As, “Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy,” physica status solidi (b), vol. 255, no. 3, p. 1600729, 2018.
Blumenthal, Sarah, et al. “Stacked Self-Assembled Cubic GaN Quantum Dots Grown by Molecular Beam Epitaxy.” Physica Status Solidi (B), vol. 255, no. 3, 2018, p. 1600729, doi:https://doi.org/10.1002/pssb.201600729.

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