1. Department of Information Engineering, University of Padova, via Gradenigo 6/B, 35131 Padova, Italy
2. IEMN (Institute of Electronics, Microelectronics and Nanotechnology), Avenue Poincaré, 59650 Villeneuve d’Ascq, France
3. Dipartimento di Ingegneria “Enzo Ferrari,” University of Modena and Reggio Emilia, Via P. Vivarelli, 10, 41125 Modena, Italy
4. École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
5. Dipartimento di Scienze e Metodi dell’Ingegneria, University of Modena and Reggio Emilia, via Amendola 2—Pad. Morselli, 42122 Reggio Emilia, Italy