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Related Experiment Videos

Phototunable Dielectric Huygens' Metasurfaces.

Kebin Fan1, Jingdi Zhang2, Xinyu Liu1

  • 1Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, NC, 27708, USA.

Advanced Materials (Deerfield Beach, Fla.)
|April 11, 2018
PubMed
Summary

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Researchers demonstrate a dynamic Huygens

Area of Science:

  • Metasurfaces
  • Optical Engineering
  • Terahertz Technology

Background:

  • Conventional dielectric metasurfaces are static, limited by geometrical tuning for applications.
  • Static nature restricts the dynamic control and versatility of metasurface properties.

Purpose of the Study:

  • To propose and demonstrate optical control of resonant eigenmodes in Huygens' metasurface (HMS) absorbers.
  • To achieve dynamic modulation of transmission and phase using optical excitation.

Main Methods:

  • Utilized optical excitation to control resonant eigenmodes in Huygens' metasurface (HMS) absorbers.
  • Employed coupled mode theory and S-parameter simulations to analyze metasurface dynamics.

Main Results:

Keywords:
Huygens' metasurfacescoupled mode theorydielectric metasurfaceseigenmodestunable materials

Related Experiment Videos

  • Achieved an intensity transmission modulation depth of 99.93% at 1.03 THz.
  • Demonstrated an associated phase change exceeding π/2 radians.
  • Identified modification of the magnetic dipole-like odd eigenmode as the primary tuning mechanism.

    • Conclusions:

    • Optical excitation enables dynamic control over Huygens' metasurface absorbers.
    • The dynamic HMS offers wide tunability and versatility for reconfigurable metasurface applications.
    • This approach opens new avenues for advanced optical devices beyond the demonstrated spectral range.