Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 70, Issue 8, Pages 6850-6857Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3177462
Keywords
Metasurfaces; Reflection; Electromagnetics; Polarization; Surface waves; Phase control; Optical surface waves; Metasurface; multifunctional; ultrathin; wideband
Funding
- Fundamental Research Funds for the Central China Normal Universities from China [CCNU20GF006]
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The metasurface is a subwavelength structure-based ultra-thin device with strong light field control ability. In this article, a novel ultrathin metasurface is proposed, which can function as a beam splitter and controls the polarization of electromagnetic waves. Broadband operation and phase control are achieved based on geometric phase theory.
The metasurface is a functional film device based on a subwavelength structure, which has a strong light field control ability and has the advantages of ultrathin, low loss, and easy manufacturing. However, realizing a multifunctional metasurface, yet simple enough to design, manufacture, and thin is still a challenge. In this article, we propose a novel metasurface with negligible thickness as a beam splitter, which can achieve half transmission and half reflection of the incident wave at the same frequency. It also controls the polarization of circularly polarized electromagnetic (EM) waves in the transmission mode. A broadband operation can be achieved based on the geometric phase theory, and the phase control can be achieved by azimuth rotation of the structure. The numerical results of the metasurface are in good agreement with the experimental results in the measured frequency range. The ultrathin multifunctional metasurface realized by the geometric phase principle provides an important stepping stone for simple optical devices and can be extended to a higher frequency range.
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