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Broadband polarizers based on graphene metasurfaces
Optics Letters
|December 2, 2016
Summary
We developed novel terahertz metasurfaces using graphene patches to transform polarized light. These ultrathin devices enable broadband terahertz wave manipulation for integrated terahertz systems.
Area of Science:
- Optics and Photonics
- Materials Science
- Electrical Engineering
Background:
- Terahertz (THz) wave manipulation is crucial for advanced spectroscopy and imaging.
- Graphene-based metasurfaces offer unique electromagnetic properties for THz applications.
Purpose of the Study:
- To design and demonstrate ultrathin terahertz metasurfaces for polarization conversion.
- To achieve broadband cross-polarization transformation using graphene structures.
Main Methods:
- Fabrication of terahertz metasurfaces using aligned rectangular and L-shaped graphene patches on a dielectric layer.
- Characterization of transmitted and reflected wave polarization conversion properties.
Main Results:
- Demonstrated conversion of linearly polarized THz waves to circular or elliptical polarization.
- Achieved broadband cross-polarization transformation in both reflection and transmission modes.
- Designed an ultrathin broadband terahertz quarter-wave plate.
Conclusions:
- The proposed graphene metasurfaces provide tunable and efficient THz polarization control.
- These metasurfaces are promising building blocks for integrated terahertz systems and devices.
