Multi-spectral Metasurface for Different Functional Control of Reflection Waves.

Area of Science:

• Electromagnetics
• Materials Science
• Nanotechnology

Background:

• Metasurfaces offer advanced electromagnetic wave manipulation with simpler fabrication than traditional metamaterials.
• Controlling electromagnetic waves across multiple frequency bands simultaneously presents a significant challenge.

Purpose of the Study:

• To design and demonstrate a multi-spectral metasurface for simultaneous beam deflection and broadband diffusion at two different frequency bands.
• To achieve independent control of reflected waves for distinct functionalities at K-band and X-Ku band.

Main Methods:

• Proposed a two-layered metallic metasurface design backed by a metallic ground plane.
• Utilized cross-line structures for phase control in the top layer and topologically morphed I-shaped patterns for gradient phase distribution in the bottom layer.
• Validated the design through both simulation and experimental analysis.

Main Results:

• Successfully achieved beam deflection at K-band.
• Demonstrated broadband diffusion at X-Ku band.
• Confirmed independent control of reflected waves for distinct functions at the two frequency bands.

Conclusions:

• The proposed multi-spectral metasurface effectively achieves simultaneous beam deflection and broadband diffusion.
• The design enables independent control of electromagnetic wave manipulation at different frequency bands.
• This work advances the development of versatile metasurface applications in electromagnetics.