What question did this study set out to answer?

To explore a liquid-crystal metasurface for fast wavefront control across dual Ka-band frequencies.

February 22, 2026Open Access

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface (Adv. Mater. Technol. 4/2026)

DKDaehyeon KimPohang University of Science and Technology DADonggeun AnPohang University of Science and Technology HSHyunjae ShinPohang University of Science and Technology

Key Points

To explore a liquid-crystal metasurface for fast wavefront control across dual Ka-band frequencies.
Developed a complementary patch-slot architecture for the metasurface.
Utilized a 10-μm liquid-crystal layer to enhance electromagnetic coupling.
Performed experiments to evaluate switching speed and effectiveness in wavefront manipulation.
Achieved millisecond switching times for wavefront control.
Demonstrated independent manipulation of dual-polarized beams at 28/38 GHz frequencies.
Showed potential application in scalable multifunctional devices for 6G communications.

Abstract

Liquid-Crystal Metasurface Wavefront Control This cover artistically depicts a liquid-crystal metasurface dynamically controlling multi-colored beams, representing independent dual-polarized wavefront manipulation at dual Ka-band frequencies (28/38 GHz). The complementary patch-slot architecture enables an ultra-thin 10-μm liquid-crystal layer through strong electromagnetic coupling, achieving millisecond switching for scalable multifunctional devices in 6G communications and sensing. More information can be found in the Research Article by Wonbin Hong and co-workers (DOI: 10.1002/admt.202501695).

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