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  3. Overcoming Barriers To Dynamic Phase-only Modulation In Transmissive Metasurfaces Via Diffraction Control.
  1. Home
  3. Overcoming Barriers To Dynamic Phase-only Modulation In Transmissive Metasurfaces Via Diffraction Control.

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Overcoming Barriers to Dynamic Phase-Only Modulation in Transmissive Metasurfaces via Diffraction Control.

Juyoung Kim1,2, Ruzan Sokhoyan2, Minkyoon Yi1

  • 1Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea.

ACS Nano
|February 11, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers developed new transmissive metasurfaces for dynamic wavefront control. This breakthrough enables continuous 0-360° phase tuning with constant transmission, overcoming previous limitations in active photonic systems.

Keywords:
Fano curveactive metasurfacesdiffractionphase modulationphase-only controltransmission zero

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Area of Science:

  • Photonics and optical engineering
  • Metamaterials and nanophotonics

Background:

  • Active photonic systems utilize metasurfaces for dynamic wavefront control.
  • Transmissive metasurfaces are crucial for integrated photonic systems but face limitations in phase control (0-180°).
  • Existing designs are often reflective, limiting applications.

Purpose of the Study:

  • To overcome the limitations of single-resonance transmissive metasurfaces.
  • To achieve continuous 0-360° phase tuning with constant transmission amplitude.
  • To enable dynamic phase control in compact, integrated photonic systems.

Main Methods:

  • Introduced additional diffraction ports in reflection while maintaining a single transmission port.
  • Utilized temporal coupled-mode theory for analytical demonstration.
  • Validated the approach with proof-of-concept active metasurfaces using lithium niobate, germanium, and silicon resonators.

    • Main Results:

    • Demonstrated continuous 0-360° phase tuning in transmission without a transmission null.
    • Achieved spectrally flat transmission amplitude across the entire phase range, similar to multiresonant systems.
    • Simulated metasurfaces showed tunable phase shifts of ~250° and ~300° with near-ideal transmission amplitude (~0.45 and ~0.4).

    Conclusions:

    • The novel design enables compact, dynamically tunable transmissive metasurfaces with near-ideal phase and amplitude characteristics.
    • This approach overcomes fundamental constraints of single-resonance transmissive architectures.
    • Paves the way for advanced integrated and reconfigurable photonic systems.