1. Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
2. Delmic BV, Kanaalweg 4, 2628 EB, Delft, The Netherlands
3. Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Äußere Nürnberger Strasse 62, 91301 Forchheim, Germany
4. CEMES-CNRS, 29 Rue Jeanne Marvig, 31055 Toulouse, France