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Updated: May 9, 2026

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Subarray programmable terahertz metasurface for optical logic and high-order amplitude modulation.

Lan Wang1, Sen Gong2,3, Chaoming Xia3

  • 1School of Physics, University of Electronic Science and Technology of China, Chengdu, 611731, China. wanglan@uestc.edu.cn.

Light, Science & Applications
|May 7, 2026
PubMed
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This summary is machine-generated.

This study introduces a novel terahertz (THz) metasurface capable of performing Boolean logic and four-level pulse amplitude modulation (PAM-4). This integrated communication-sensing-computing platform offers reconfigurable THz front ends for advanced applications.

Area of Science:

  • Terahertz (THz) technology
  • Metamaterials and Nanophotonics
  • Integrated Photonics

Background:

  • Integrated terahertz (THz) systems demand reconfigurable platforms for simultaneous communication, sensing, and computing.
  • Existing platforms face challenges in supporting both logic operations and signal modulation efficiently.

Purpose of the Study:

  • To propose a subarray programmable THz metasurface for integrated communication-sensing-computing systems.
  • To demonstrate simultaneous Boolean logic mapping and four-level pulse amplitude modulation (PAM-4) at the wavefront.

Main Methods:

  • Utilized a subarray programmable THz metasurface with high electron mobility transistors (HEMTs) as active elements.
  • Employed collective resonance tuning of the two-dimensional electron gas (2DEG) for broadband control.

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  • Implemented spatial domain combinatorial coding across subarrays for logic operations and PAM-4.

    • Main Results:

    • Demonstrated real-time Boolean functions up to 200 MHz and stable PAM-4 in a 220 GHz quasi-optical link.
    • Achieved single-tone modulation up to 6 GHz.
    • Integrated optical logic and high-order amplitude modulation on a single hardware platform.

    Conclusions:

    • The subarray-level gating strategy enables compact, reconfigurable THz front ends.
    • This approach provides a scalable solution for future THz communication and intelligent sensing systems.
    • Successfully integrated logic operations and advanced modulation schemes without increased addressing complexity.