Zhengji Xu is an Associate Professor and Assistant Dean in School of Microelectronics Science and Technology, Sun Yat-sen University, China. He received B.Eng. degree and Ph.D. degree from Nanyang Technological University, Singapore, in 2010 and 2016, respectively. He worked as a scientist in Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), Singapore from Nov 2017 to Mar 2020. His research interests include flat optics, plasmonics, nanofabrication and nanophotonics integration.