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Multifunctional full-space metasurface controlled by frequency, polarization and incidence angle
Optics Express
|March 17, 2021
Summary
This study introduces a novel multifunctional metasurface capable of controlling electromagnetic waves using frequency, polarization, and incidence angle. This breakthrough enables advanced applications in full-space wave manipulation.
Area of Science:
- Electromagnetics
- Materials Science
- Wave Optics
Background:
- Metasurfaces offer advanced control over electromagnetic (EM) waves, particularly in full-space manipulation.
- Existing metasurfaces often rely on polarization or frequency control, with limited angle-dependent functionality.
Purpose of the Study:
- To propose and demonstrate a multifunctional full-space metasurface controlled by frequency, polarization, and incidence angle.
- To enable novel applications through enhanced control over electromagnetic wave manipulation.
Main Methods:
- Design of a meta-atom exhibiting asymmetric transmission and polarization conversion in the C-band.
- Implementation of broadband, high-efficiency cross-polarization conversion for reflected waves in the Ku-band.
- Demonstration of efficient retroreflection under oblique incidence at specific frequencies.
Main Results:
- The metasurface functions as a dual orbital angular momentum (OAM) vortex beam generator and beam deflector under normal incidence.
- Under oblique incidence, the metasurface acts as a multi-channel retroreflector.
- Both simulated and measured results confirm excellent performance.
Conclusions:
- The developed metasurface offers unprecedented control over electromagnetic waves by incorporating incidence angle as a control parameter.
- This work provides a new design paradigm for multifunctional metasurfaces, paving the way for advanced EM applications.
