Observation of long-lived oblique excitons in GaN-AlGaN multiple quantum wells

The 2-K recombination dynamics of coupled GaN-AlGaN multiple quantum wells reveals a composite nature in terms of the joint contributions of short-lived direct excitons and long-lived oblique ones. The possibility to observe these oblique excitons, which produce a unusual blueshift of the photoluminescence at long decay times is found to be in straightforward correlation with the presence of internal electric fields together with the existence of a slight disorder at the monolayer scale. [S0163-1829(99)09815-X].


Published in:
Physical Review B, 59, 15, 10246-10250
Year:
1999
ISSN:
0163-1829
Keywords:
Laboratories:




 Record created 2010-10-05, last modified 2018-09-13


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