研究目的
To demonstrate a bi-layer metamaterial structure with mirror symmetry that acts as a linear polarization converter under two-antisymmetric-beam illumination, achieving high performance including broad bandwidth, high transmittance, and high efficiency.
研究成果
The study successfully demonstrates a bi-layer metamaterial structure with mirror symmetry as a broadband and highly efficient linear polarization converter under two-antisymmetric-beam illumination, opening a new pathway for broadband and high-performance polarization converters.
研究不足
The experimental results show narrower bandwidth compared to simulations, attributed to fabrication errors.
1：Experimental Design and Method Selection:
The study employs a bi-layer metamaterial structure with mirror symmetry, utilizing the Fabry-Pérot-like cavity effect and coherent excitations of spatially separated cut-wire resonators.
2：Sample Selection and Data Sources:
The samples are fabricated using conventional lithography on a quartz substrate.
3：List of Experimental Equipment and Materials:
Gold cut-wire arrays, quartz spacer, THz time domain spectroscopy for measurement.
4：Experimental Procedures and Operational Workflow:
The reflection and transmission spectra are measured under single-beam and two-beam illumination.
5：Data Analysis Methods:
The interference behaviors under two-beam illumination are emulated by the superposition of reflection and transmission information under single-beam illumination.
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