Photoluminescence studies of SiGe quantum dot arrays prepared by templated self-assembly C. Dais, G. Mussler, H. Sigg, T. Fromherz, V. Auzelyte, H. H. Solak and D. Grützmacher EPL, 84 6 (2008) 67017 Published online: 12 January 2009 DOI: 10.1209/0295-5075/84/67017