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Normalized low temperature PL spectra for QDashes with the nominal thickness of QDash layer changing from .
Temperature dependent PL spectra for structures with the smallest (sample A) and with the biggest (sample E) size of QDashes.
The PL intensities plotted vs inversed temperature (symbols). The solid lines are curves fitted to the experimental data.
Activation energies and (triangles), low temperature QDash ground state energy (rotated square), low temperature barrier energy (square), and sum of both activation energies with low temperature QDash ground state (full circles) vs nominal QDash-layer thickness.
Sketch of the PL thermal quenching mechanism in QDash structures. The thick and the thin dashed lines represent the confinement potential of QDash and quantum well (wetting layer), respectively.
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