Wideband Polarization‐Insensitive 1‐Bit Phase Manipulations with Co‐and Cross‐Polarized Conversions for LP and CP Waves

• Published in: Laser & photonics reviews 2024-07, Vol.18 (7), p.n/a
• Main Authors: Liu, Wei, Dai, Jun Yan, Zhang, Yan Ming, Sun, Meng Ke, Zhang, Lei, Li, Ya, He, Hong Jun, Cui, Tie Jun, Cheng, Qiang
• Format: Article
• Language: English
• Subjects: beam steering; Circular polarization; Coding; coding metasurface; Electric fields; Electromagnetic radiation; Frequency ranges; Metasurfaces; polarization conversions; polarization‐insensitive; Radar imaging; Reflected waves; wideband phase manipulation; Wireless communication systems
• ISSN: 1863-8880; 1863-8899
• DOI: 10.1002/lpor.202400049

Polarization and phase manipulations have gained widespread applications across various fields. The emergence of metasurface provides a new platform for the manipulation of electromagnetic waves. However, most metasurfaces are limited to modulating only one single property. Here, a coding metasurface that achieves 1‐bit phase manipulations of both co‐polarized and cross‐polarized reflected waves for linear and circular polarization wave excitations. Notably, the proposed metasurface enables co‐polarized 1‐bit phase responses for incident electric fields with arbitrary orientations and spin directions. The simulated results demonstrate an operating efficiency over −1.7 dB in the frequency range from 7 to 11.1 GHz, with a relative bandwidth of 45.3%. Furthermore, the introduction of space‐polarization coding strategies facilitates the beam and polarization manipulations. To verify the feasibility of the coding metasurface, a sample and conduct experiments are fabricated, revealing good agreement between the simulations and measurements. These findings hold significant promise for the advancement of radar, imaging, and wireless communication systems, with potential applications in various domains. Under excitations of linear and circular polarization waves, the proposed coding metasurface achieves 1‐bit phase manipulation of both co‐polarized and cross‐polarized reflection waves. Additionally, the co‐polarized phase manipulation is polarization insensitive, allowing for incident waves with electric fields of arbitrary orientation and spin direction. Simulation results demonstrate an efficiency above −1.7 dB from 7 to 11.1 GHz.