Midinfrared intraband electroluminescence from AlInAs quantum dots
Identifieur interne : 00C039 ( Main/Repository ); précédent : 00C038; suivant : 00C040Midinfrared intraband electroluminescence from AlInAs quantum dots
Auteurs : RBID : Pascal:03-0352352Descripteurs français
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Abstract
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. © 2003 American Institute of Physics.
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<front><div type="abstract" xml:lang="en">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. © 2003 American Institute of Physics.</div>
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