Electronically-Controlled Beam-Steering through Vanadium Dioxide Metasurfaces.

Area of Science:

• Metamaterials and Nanophotonics
• Electromagnetics and Wave Manipulation
• Solid-State Physics

Background:

• Engineered metamaterials enable novel manipulation of electromagnetic waves.
• Existing beam-steering technologies often rely on mechanical components or external systems, limiting robustness and integration.

Purpose of the Study:

• To introduce a novel approach for creating reconfigurable metasurfaces for electronically controlled electromagnetic wave deflection.
• To demonstrate a fully-integrated, robust beam-steering device solution without mechanical elements or external light sources.

Main Methods:

• Utilizing a two-dimensional array of resonant metasurface unit-cells with embedded electronically-controlled phase-change materials.
• Designing metasurfaces capable of tilting the phase front of electromagnetic waves.
• Optimizing a proof-of-concept metasurface for operation at 100 GHz.

Main Results:

• Demonstrated a reconfigurable metasurface capable of deflecting electromagnetic waves electronically.
• Achieved up to 44° beam deflection in both horizontal and vertical directions at 100 GHz.
• The developed metasurface operates without mechanical parts, external light, or reflectarrays.

Conclusions:

• The novel metasurface design provides a robust and fully-integrated beam-steering solution.
• Dynamic control of electromagnetic wave propagation direction is achievable across millimeter-wave to far-infrared frequencies.
• This technology holds transformative potential for imaging, sensing, and communication applications.