1. NANOM MEMS, G. Cosbuc 9,Rasnov, Brasov,Romania,505400
2. University of Cantabria,Group of Optics, Faculty of Sciences,Department of Applied Physics,Spain
3. Tyndall National Institute-University College Cork,Lee Maltings, Dyke Parade,Cork,Ireland,T12 R5CP
4. CNR ICMATE, Corso Stati Uniti 4,Padova,Italy,I-35127
5. Institute of Nanotechnology CNR-NANOTEC, Via Orabona 4,Bari,Italy,70126