Fine Structure of Neutral Excitons in Single GaAlAs Quantum Dots

• Authors: M. Molas , K. Gołasa , B. Piętka , M. Potemski , A. Babiński
• Languages of publication: EN

Abstracts

EN

Optical anisotropy of neutral excitons in GaAlAs/AlAs quantum dots is investigated. Low-temperature polarization-sensitive photoluminescence measurements of single quantum dots are performed. It is found that neutral excitons (X) in the quantum dots exhibit a fine structure splitting. The fine structure splitting ranges from 10 μeV to 100 μeV and correlates with the X energy. The polarization axis of the fine structure splitting is well oriented along [110] crystallographic direction of a substrate. The orientation is attributed to the elongation of GaAlAs/AlAs quantum dots in the [110] direction of the substrate.

Keywords

EN

78.55.Cr; 78.67.Hc

Discipline

• 78.55.Cr: III-V semiconductors
• 78.67.Hc: Quantum dots

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 6
• Pages: 988-990

Dates

published

2012-12

Contributors

author

M. Molas

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, PL-00-681 Warsaw, Poland
• Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, 25, av. des Martyrs, 38042 Grenoble, France

author

K. Gołasa

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, PL-00-681 Warsaw, Poland

author

B. Piętka

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, PL-00-681 Warsaw, Poland

author

M. Potemski

• Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, 25, av. des Martyrs, 38042 Grenoble, France

author

A. Babiński

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, PL-00-681 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.122.988