1. DTU Fotonik, Department of Photonics Engineering; Technical University of Denmark; Ørsteds Plads 343 DK-2800 Kgs. Lyngby Denmark
2. P. N. Lebedev Physical Institute; Leninsky pr. 53 117924 Moscow Russia
3. Plasmonics Ltd; Nijnie Polia Street, 52/1 119382 Moscow Russia
4. Peter Grünberg Institute (PGI-9); Research Centre Jülich GmbH; 52425 Jülich Germany