Growth-Temperature Dependence of Wetting Layer Formation in High Density InGaAs/GaAs Quantum Dot Structures Grown by Droplet Epitaxy

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概要

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• We present a study of the growth-temperature-dependent wetting layer formation in self-assembled InGaAs/GaAs quantum dot structures formed by droplet epitaxy at elevated growth temperatures up to 500 °C. The energies of electron heavy-hole and light-hole transitions of the InGaAs wetting layer is investigated by contactless electroreflectance spectroscopy. A clear indication of a strong growth-temperature influence on the wetting layer morphology is observed. At the lowest growth temperature no wetting layer could be detected at all. The influence of the substrate temperature on structural and optical properties of the dots is also discussed.

• 2012-08-25

著者

• Sek Grzegorz

  Institute Of Physics Wroclaw University Of Technology

• Misiewicz Jan

  Institute Of Physics Wroclaw University Of Technology

• Reithmaier Johann

  Technische Physik. Universitat Wiirzburg, Am Hubland

• Misiewicz Jan

  Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspiankiego 27, 50-370 Wroclaw, Poland

• Zuerbig Verena

  Technische Physik, Institute of Nanostructure Technologies and Analytics, CINSaT, University of Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany

• Bugaew Natalia

  Technische Physik, Institute of Nanostructure Technologies and Analytics, CINSaT, University of Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany

• Kozub Michał

  Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspiankiego 27, 50-370 Wroclaw, Poland

• Musiał Anna

  Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspiankiego 27, 50-370 Wroclaw, Poland

• Reithmaier Johann

  Technische Physik, Institute of Nanostructure Technologies and Analytics, CINSaT, University of Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany

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• Theoretical Studies of the Influence of Temperature on Photoluminescence Dynamics in GaInNAs/GaAs Quantum Wells

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