Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-10-06
Appl. Phys. Lett. 97, 043507 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1063/1.3456528
Temperature dependence of intersubband transitions in AlN/GaN multiple quantum wells grown with molecular beam epitaxy is investigated both by absorption studies at different temperatures and modeling of conduction-band electrons. For the absorption study, the sample is heated in increments up to $400^\circ$C. The self-consistent Schr\"odinger-Poisson modeling includes temperature effects of the band-gap and the influence of thermal expansion on the piezoelectric field. We find that the intersubband absorption energy decreases only by $\sim 6$ meV at $400^\circ$C relative to its room temperature value.
Andersson Thorvald G.
Berland Kristian
Farivar Rashid
Hyldgaard Per
Larsson Anders
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