Ulbrich, N. and Bauer, J. and Scarpa, G. and Boy, R. and Schuh, Dieter and Abstreiter, Gerhard and Schmult, Stefan and Wegscheider, Werner
Midinfrared intraband electroluminescence from AlInAs quantum dots.
Applied Physics Letters 83 (8), pp. 1530-1532.
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 observed at higher injection currents which is associated with luminescence from the inhomogeneously broadened quantum-dot ensemble. The reported design is a possible solution to obtain population inversion in unipolar quantum-dot-cascade structures.
|Date:||25 August 2003|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|78.67.Hc; 78.60.Fi; 42.55.Px; 78.20.Jq; 73.21.La||PACS|
|Keywords:|| aluminium compounds, semiconductor quantum dots, electroluminescence, indium compounds, III-V semiconductors, Stark effect, spectral line broadening, population inversion, quantum dot lasers, quantum cascade lasers|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||14 Dec 2009 13:18|
|Last Modified:||20 Jul 2011 22:11|