Ultrathin Pancharatnam–Berry Metasurface with Maximal Cross‐Polarization Efficiency

Novel ultrathin dual-functional metalenses are proposed, fabricated, tested, and verified in the microwave regime for the first time. The significance is that their anomalous transmission efficiency almost reaches the theoretical limit of 25%, showing a remarkable improvement compared with earlier ultrathin metasurface designs with less than 5% coupling efficiency. The planar metalens proposed empowers significant reduction in thickness, versatile focusing behavior, and high transmission efficiency simultaneously. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are…

• WF
  Welch Foundation

  Award: F-1802
• NU
  National University of Singapore

  Award: R-263-000-688-112
• NN
  National Natural Science Foundation of China

  Awards: 61401122, 61371044
• AF
  Air Force Office of Scientific Research

  Award: FA9550-13-1-0204