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Flexible Polarization Manipulation Using Multi-band and Wide-angle Multi-function Reflective Polarization Metasurface for Terahertz Regime

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In this paper, a metasurface-based reflective polarization converter for multi-band multi-functional polarization conversion with high-efficiency and wide-angle in the terahertz region is presented. The proposed metasurface cell is formed by a hybrid resonator composed of a modified double V and a stepped cut-wire, and a single-layer polyimide backed with gold. In the frequency band of 0.7–1.1 THz and 1.72–1.92THz, a linearly y-/x-polarized (LP) incident EM wave is converted into its cross-polarized direction with a polarization conversion ratio greater than 0.9 (PCR > 0.9). Also, in the frequency band of 1.05–1.71THz, an LP incident EM wave is converted into a circularly polarized reflective wave with an axial ratio (AR) less than 3 dB (AR < 3 dB). The multi-functional polarization conversion performance stays stable even though the incident angle up to \(40^\circ\). The numerical calculations, and physical insight analysis using surface currents distributions are studied. The results demonstrate that the proposed converter provides a new and efficient method to design high-efficient, incident angle insensitive, multi-band polarization converter for multiple polarization conversion in the terahertz frequency bands. The design can find potential applications in multi-band and multi-polarization THz communication, imaging, and sensing.

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Authors and Affiliations



Qi Zheng and Jingjing Qi worked on the theoretical analysis, structure design, simulations, discussions, and wrote the main manuscript. Peyman PourMohammadi also worked on the writing. All authors reviewed the manuscript.

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Correspondence to Qi Zheng.

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Zheng, Q., Qi, J. & PourMohammadi, P. Flexible Polarization Manipulation Using Multi-band and Wide-angle Multi-function Reflective Polarization Metasurface for Terahertz Regime. Plasmonics 18, 2263–2272 (2023).

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