Professor Hui Liu and Ph.D student Chong Sheng have made an important progress in optical metamaterial research. They realized the wavefront shaping by emulating curved space in transformation optical waveguides. This method can be used to produce collimation beam and mimic Einstein Ring. The work published in Nature Communications 7:10747, DOI: 10.1038/ncomms10747 (2016). This work was done in collaboration with Dr. Rivka bekenstein and Prof. Moti Segev at Technion in Israel.