研究目的
Investigating the design and experimental verification of a linear polarization beam splitter operating in the terahertz band.
研究成果
The designed terahertz beam splitter effectively divides the incident wave into four beams with equal power and different directions in the 0.18–0.30 THz band. It offers advantages in size, cost, and processing ease, with potential applications in terahertz imaging and stealth.
研究不足
The coupling between units affects the phase gradient, leading to deviations in the re?ection angles. Fabrication errors and terahertz wave attenuation in air also impact experimental results.
1：Experimental Design and Method Selection:
The beam splitter is designed with a unit cell composed of an 'I' type metal pattern, a middle dielectric layer, and a bottom metal layer. The metasurface is formed by subarrays of four unit cells rotated progressively at 45?.
2：5?. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: A sample is fabricated using printed circuit board technology.
3：List of Experimental Equipment and Materials:
The unit cell includes a gold pattern, Duroid 5880 dielectric layer, and a gold bottom layer.
4：Experimental Procedures and Operational Workflow:
The beam splitter's performance is simulated using CST Microwave Studio and experimentally verified using a terahertz photoconductive antenna setup.
5：Data Analysis Methods:
The re?ectivity and far-?eld patterns are analyzed to determine the beam splitting efficiency and angles.
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