研究目的
Investigating the design and performance of a tri-band linear to circular polarization converter in the terahertz regime using metasurfaces.
研究成果
The proposed transmissive triple band LCPC operates effectively in the terahertz regime, converting linear polarization wave into circular polarization wave in three frequency bands. The device's multi-resonance property validates its multi-band operation, making it suitable for applications such as radar, medical treatment, and antenna design.
研究不足
The study is limited to simulation verification using HFSS and does not include experimental validation. The performance is evaluated based on axial ratio, and the practical implementation may face challenges in achieving the desired phase difference across all bands.
1：Experimental Design and Method Selection:
The study proposes a tri-band linear to circular polarization converter using bi-layered metasurfaces separated by a dielectric spacer. The design is optimized for performance in the terahertz regime.
2：Sample Selection and Data Sources:
The unit cell structure of the metasurface is designed to tailor the cross coupling effect, ensuring orthogonal components of the transmitted wave have the same magnitude and a phase difference of 90° or 270°.
3：0°.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Gold is used as a conductor, and polyimide quartz with a dielectric constant of 4.0 is used as a substrate.
4：0 is used as a substrate.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Full wave electromagnetic simulation is carried out in High Frequency Structure Simulator (HFSS) using floquet ports and master slave boundary conditions.
5：Data Analysis Methods:
The performance criterion for the converter is taken as 3 dB of axial ratio. The axial ratio for the transmitted wave is calculated to verify the conversion performance.
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