1. UHasselt – Hasselt University Institute for Materials Research (IMO) Agoralaan 1 – Building D Diepenbeek 3590 Belgium
2. IMEC Associated Lab IMOMEC Wetenschapspark 1 Diepenbeek 3590 Belgium
3. Department of Physics Swansea University Singleton Park Swansea SA2 8PP UK
4. Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics Technische Universität Dresden Nöthnitzer Str. 61 Dresden 01187 Germany