Regensburg 2002 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 38: Poster 2

HL 38.22: Poster

Donnerstag, 14. März 2002, 16:30–19:00, Poster A

Light emission from quantum-dot-like structures in cubic GaN/InGaN/GaN double heterostructures and quantum wells — •Olaf Husberg, Alexandre Khartchenko, and Klaus Lischka — Fachbereich Physik, Universität Paderborn

Recent results of experimental investigations of cubic GaN/InGaN/GaN double heterostructures grown by molecular beam epitaxy are reviewed. Micro-Raman effect, photoluminescence high-resolution x-ray diffraction measurements reveal clear evidence that the photoluminescence of these double heterostructures is related to In-rich quantum dot-like structures which are embedded within the InGaN layers. Annealing experiments corroborate the assumption that the formation of the In-rich clusters is terminated already during the growth process.