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Si-interdiffusion in heavily doped AlN-GaN-based quantum well intersubband photodetectors
Auteur(s)
Di Francesco, Joab F.
Martin, Denis
Grandjean, Nicolas
Kotsar, Yulia
Monroy, Eva
Date de parution
2011
In
Applied Physics Letters, American Institute of Physics (AIP), 2011/98/241101/1-3
Résumé
We demonstrate the effect of rapid thermal annealing on heavily Si-doped AlN/GaN quantum wells. After 1000 °C annealing during 5, 10, and 20 min, the dominant effect was interdiffusion of Si rather than intermixing between the Al and Ga atoms. Both their original value and the magnitude of the changes after annealing reveal that intersubband absorption and photovoltage are related to two different optical transitions as follows: absorption occurs in the 1 to 2 intersubband transition, whereas photovoltage is due to a subsequent process from the 1 to 2 and the manifold of 2 to higher order transitions.
Identifiants
Type de publication
journal article
