1. University College Dublin, School of Electrical, Electronic and Communications Engineering, IoE2 Lab, SFI-Strategic Research Cluster in Solar Energy Conversion, College of Engineering and Architecture, Belfield, Dublin 4, Ireland
2. Technische Universität Ilmenau, Institut für Mikro-und Nanotechnologien, Macro-Nano, Fachgebiet Optik Design, P.O. Box 10 05 65, 98684 Ilmenau, Germany