1. Laboratoire de Physique des
Solides CNRS/UMR8502, Bâtiment
510, University Paris-Sud, Orsay 91405, France
2. Department of Physics, Lund University, P.O.
Box 118, SE-221 00 Lund, Sweden
3. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, Campinas, São Paulo 13083-970, Brazil
4. Instituto de Quı́mica-Fı́sica
- CSIC, Serrano 119, 28006 Madrid, Spain
5. Institute of Electrical Engineering, University of Paderborn,Warburger Strasse 100, D-33098 Paderborn, Germany
6. Departamento de Química
Física, Universidade de Vigo, 36310 Vigo, Spain
7. Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain
8. Ikerbasque,
Basque Foundation for Science, 48013 Bilbao, Spain
9. ICFO-Institut
de Ciencies Fotoniques, Mediterranean
Technology Park, 08860 Castelldefels (Barcelona), Spain
10. ICREA-Institució Catalana
de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010 Barcelona, Spain