Open AccessWavelength-dependent holographic impedance metasurfaces
Author(s) -
Yun Bo Li,
Limin He,
Hai Peng Wang,
Tie Jun Cui
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.423348
Subject(s) - optics , holography , wavelength , physics , polarization (electrochemistry) , electrical impedance , wave impedance , beam steering , electromagnetic radiation , circular polarization , microwave , beam (structure) , materials science , microstrip , chemistry , quantum mechanics
Impedance metasurface can establish a link between an electromagnetic surface wave and spatial wave and hence has attracted much attention of researchers in recent years. The holographic method, which is well known in the optical area, has also the great ability to shape the radiated beams in the microwave band by introducing the concept of surface impedance. Here, we propose a method to shape the radiated beams at two different wavelengths using single-layer multiplexing holographic impedance metasurface with in-plane feeding. For one wavelength, the generated broadside beam in the far field has the left-hand circular polarization, while the broadside beam in the other wavelength has the right-hand circular polarization. The radiation performance under different wavelengths are controlled independently due to the novel design of two eigen-modes in the impedance unit cell, in which the ratio of the two wavelengths can be large enough. To verify the proposed design experimentally, we fabricate a metasurface sample, and good agreement is observed between the simulation and measurement results.