Sliding metasurface for wide-angle beam steering with sharp frequency filtering

Area of Science:

• Electromagnetic metasurfaces
• Wave control and manipulation
• Applied physics

Background:

• Increasing demand for efficient spectral and spatial resource utilization in congested electromagnetic environments.
• Need for advanced solutions to manage interference and optimize signal propagation.

Purpose of the Study:

• To demonstrate a novel passive sliding metasurface capable of unifying sharp frequency filtering and wide-angle beam steering.
• To establish a two-dimensional frequency-angle selection window for coordinated spectral-spatial wave control.

Main Methods:

• Implementation of a fully passive sliding metasurface architecture.
• Utilizing global geometric displacement between complementary phase profiles instead of local reconfiguration.
• Adopting a transmission-line-inspired design with stacked layers forming a quasi-Fabry-Pérot cavity within meta-atoms.

Main Results:

• Achieved sharp spectral selectivity and ultra-wide out-of-band suppression.
• Demonstrated stable beam steering over a ±57° scanning range.
• Validated the creation of a two-dimensional frequency-angle selection window.

Conclusions:

• The sliding metasurface offers a compact and broadly applicable platform for next-generation electromagnetic systems.
• This technology enables a new modality for coordinated spectral-spatial wave control.
• The sliding strategy is extensible to other frequency regimes.