Ultrathin Pancharatnam-Berry Metasurface with Maximal Cross-Polarization Efficiency Ding, Xumin ; Monticone, Francesco ; Zhang, Kuang ; Zhang, Lei ; Gao, Dongliang ; Burokur, Shah Nawaz ; de Lustrac, Andre ; Wu, Qun ; Qiu, Cheng-Wei ; Alù, Andrea Abstract Publication: Advanced Materials Pub Date: February 2015 DOI: 10.1002/adma.201405047 Bibcode: 2015AdM....27.1195D