Amsterdam (Netherlands) Amolf.

Boston (Massachussets) Nanomaterials and Nanostructure Optics.

Cambridge (Massachussets) Harvard university.

Florence (Italy) Centro Interdipartimentale per lo Studio delle Dinamiche Complesse.

Grenoble (France) Bart van Tiggelen's group.

Karlsruhe (Germany) Martin Wegener's group.

Madrid (Spain) The photonic crystal group.

Mumbai (India) Tata Institute of Fundamental Research.

Pavia (Italy) University of Pavia.

Philadelphia (Pennsylvania) Arjun Yodh's group.

Toronto (Canada) Ozin's group.

Toronto (Canada) Sajeev John's group.

Trento (Italy) Silicon Photonics Group.

Twente (Netherlands) Complex Photonic Systems.