1. Dip. di Fisica “E. Pancini”, Università degli Studi di Napoli Federico II, Napoli, Italy
2. Photon Technology (Zhejiang) Company Ltd., Jiashan, Zhejiang, China
3. Department of Electronics and Information, Politecnico di Milano, Milano, Italy
4. Innovative Materials and Devices, CNR-SPIN Institute of Superconductors, Pozzuoli, Italy
5. Shanghai Key Laboratory of Supercoductor Integrated Circuit Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, China
6. Dip. di Fisica “E. Pancini,”, Università degli Studi di Napoli Federico II, Napoli, Italy