Affiliation: | [1]Department of Physics, Faculty of Science, Ningbo University, Ningbo 315211, China [2]Photonics Research Centre, School of Electronic and Communications Engineering, Dublin Institute of Technology, Dublin 8, Ireland [3]Institute of Optoelectronic Materials & Technology, South China Normal University, Guangzhou 510631, China [4]Institute of Cybernetics of CNR, Via Campi Flegrei 34, 80072-Pozzuoli, Italy |