1. National Institute of Optics - Consiglio Nazionale delle Ricerche

    (INO-CNR, group site), Firenze, Italy (Coordinator)

  2. Universiteit Leiden (LEI), Leiden, Netherlands 

  3. The Institute of Photonic Sciences (ICFO), Barcelona, Spain

  4. Westfaelische Wilhelms-Universitaet Muenster (WWU), Muenster, Germany

  5. Imperial College of Science Technology and Medicine (IMP), London, United Kingdom

  6. Centre National de la Recherche Scientifique (CNRS), Toulouse, France

  7. Institute of Physics, Polish Academy of Sciences (IFPAN), Warszawa, Poland