Polarization-Sensitive Dielectric Membrane Metasurfaces

Dielectric metasurfaces composed of subwavelength resonators are widely employed for manipulating electromagnetic waves over a broad frequency spectrum ranging from microwaves to optics. Here, a novel type of metasurfaces, created by a periodic lattice of elliptical holes fabricated in a thin dielectric membrane, is studied both theoretically and experimentally. Such membrane metasurfaces demonstrate polarization‐selective behavior, and they change their specific functionality from a reflective magnetic mirror, for one polarization, to a transparent Huygens' surface, for the orthogonal polarization. Such a polarization dependence is achieved by manipulating the interference of Mie‐resonant multipoles through optimizing the design of the elliptic holes in the dielectric membrane. Such membrane metasurfaces can be employed as flat components with polarization‐multiplexed functionalities, bringing benefits for the integration of ultracompact signal manipulation systems.The authors acknowledge the use of the Australian National Fabrication Facility (ANFF) at the ACT Node. The work has been supported by the Australian Research Council and the Strategic Fund of the Australian National University. The authors also acknowledge support from the National Science Foundation of China (61935015, 61875150) and Singapore Ministry of Education AcRF Tier 1, Grant RG191/1