Vector Vortex Beam Emitter Embedded in a Photonic Chip. - Yuan Chen; Ke-Yu Xia; Wei-Guan Shen; Jun Gao; Zeng-Quan Yan; Zhi-Qiang Jiao; Jian-Peng Dou; Hao Tang; Yan-Qing Lu; Xian-Min Jin (Physical Review Letters, 2020)