Shaping electromagnetic waves using software-automatically-designed metasurfaces

Area of Science:

• Electromagnetics
• Materials Science
• Computational Physics

Background:

• Metasurfaces offer novel ways to manipulate electromagnetic waves.
• Current design methods can be complex and time-consuming.

Purpose of the Study:

• To present a fully digital and automated procedure for designing reflective coding metasurfaces.
• To enable precise control over reflected electromagnetic waves.

Main Methods:

• Automatic division of metasurface macro coding units into types.
• Discretely random arrangement of micro coding units within macro units.
• Optimization algorithm combined with commercial electromagnetic software.

Main Results:

• Successfully designed 1-bit coding metasurfaces for four-beam radiation.
• Realized complex 4-bit metasurfaces generating circularly- and elliptically-shaped beams.
• Demonstrated excellent performance of the automated design software.

Conclusions:

• The proposed automated method is a smart tool for realizing functional metasurface devices.
• This digital procedure significantly simplifies and accelerates metasurface design.
• The technique allows for the creation of diverse and complex electromagnetic wave manipulation systems.