1. NOOEL — Nonlinear Optics and OptoElectronics Laboratory, National Institute for the Physics of Matter (INFM), University Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
2. LICRYL — Liquid Crystal Laboratory, National Institute for the Physics of Matter (INFM), University of Calabria, 87036 Rende (CS), Italy