No CrossRef data available.
Published online by Cambridge University Press: 21 March 2011
Recent results of experimental investigations of cubic GaN/InGaN/GaN double heterostructures grown by molecular beam epitaxy are reviewed. Micro-Raman effect, photoluminescence and photoluminescence excitation spectroscopy as well as 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.