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Midinfrared intraband electroluminescence from AlInAs quantum dots

Ulbrich, N. ; Bauer, J. ; Scarpa, G. ; Boy, R. ; Schuh, Dieter ; Abstreiter, Gerhard ; Schmult, Stefan ; Wegscheider, Werner
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Date of publication of this fulltext: 14 Dec 2009 13:18


Midinfrared electroluminescence from a cascade of coupled AlInAs quantum dots and GaAs quantum wells at low temperature (80 K) is demonstrated. At low injection currents, the spectra show a clear peak at 158 meV with a luminescence width of 15 meV which is associated with transitions from the s shells of a resonant subensemble of quantum dots. A Stark shift to 143 meV and spectral broadening is ...


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