Effect of Confinement Anisotropy on Excitonic Properties in InAs/InP Quantum Dashes

• Authors: P. Mrowiński , A. Musiał , G. Sęk , J. Misiewicz , S. Höfling , A. Somers , S. Hein , A. Forchel
• Languages of publication: EN

Abstracts

EN

The influence of confinement potential anisotropy on emission properties of strongly elongated single InAs/InGaAlAs/InP quantum dashes has been investigated by polarization-resolved microphotoluminescence spectroscopy at around 1.5 μm. There have been determined the exciton fine structure splitting, degree of linear polarization of surface emission and biexciton binding energy. The investigated dashes exhibited usually: the exciton anisotropy splitting larger than 100 μeV, the corresponding biexciton binding energy of about 3 meV, and the degree of linear polarization values in the range from 24% to 55%. Here, we presented a correlation of these parameters for several quantum dashes, which can be attributed either to a change in lateral aspect ratio within the ensemble, or the carrier localization on random fluctuations of the dash confinement potential.

Keywords

EN

71.35.-y; 71.70.Gm; 78.67.Hc; 73.21.-b; 81.07.Ta

Discipline

• 78.67.Hc: Quantum dots
• 81.07.Ta: Quantum dots
• 73.21.-b: Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems(for electron states in nanoscale materials, see 73.22.-f)
• 71.70.Gm: Exchange interactions
• 71.35.-y: Excitons and related phenomena

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 5
• Pages: 801-804

Dates

published

2013-11

Contributors

author

P. Mrowiński

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

A. Musiał

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

G. Sęk

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

J. Misiewicz

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

S. Höfling

• Technische Physik, University of Würzburg and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems (RCCM), Am Hubland, D-97074 Würzburg, Germany

author

A. Somers

• Technische Physik, University of Würzburg and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems (RCCM), Am Hubland, D-97074 Würzburg, Germany

author

S. Hein

• Technische Physik, University of Würzburg and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems (RCCM), Am Hubland, D-97074 Würzburg, Germany

author

A. Forchel

• Technische Physik, University of Würzburg and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems (RCCM), Am Hubland, D-97074 Würzburg, Germany

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Identifiers

DOI

10.12693/APhysPolA.124.801