Ultra-thin single-layer compact metasurface based on a meander structure for multifunctional polarization conversion

In this paper, we proposed and investigated an ultra-thin, single-layer and compact metasurface (MS) based on a meander structure that achieves linear-polarization to linear -polarization (LP-to-LP) and linear-polarization to circular-polarization (LP-to-CP) conversion for both transmission and reflection simultaneously in the microwave region. Simulation and experimental results demonstrated that the cross-polarization coefficients of both transmission and reflection are approximately 0.49 for the normal incident LP wave passing through the MS at approximately 7 GHz, indicating a near LP-to-LP conversion in both reflection and transmission modes. Furthermore, the linear-to-circular polarization coefficients for both transmission and reflection are about 0.65 at approximately 8 GHz, indicating a near LP-to-CP conversion when the incident LP wave passes through the designed MS after transmission and reflection. The simulation results are in good agreement with the experiment. This design provides a valuable reference for the practical applications of MSs in full-space multifunctional polarization conversion and wavefront manipulation. & COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement