研究目的
To present an IR optical transmitarray based on Antenna Array Sheet (AAS) for manipulating circularly polarized wavefronts, achieving high transmission efficiency and eliminating uncontrollable polarization, with applications in refraction, focusing, and polarization discrimination.
研究成果
The paper demonstrates a simple and efficient CP optical transmitarray with high transmission efficiency (above 70%) over a 14% bandwidth, enabling applications in refraction, focusing, and polarization discrimination. It offers flexibility in design and compatibility with current fabrication technology.
研究不足
The design may have distortions due to imperfect circular polarization reconstruction and mutual coupling variations in aperiodic arrays. Fabrication accuracy and computational resources limit the simulation of larger arrays.
1：Experimental Design and Method Selection:
The design uses a unit cell with three layers of metallic elliptical patches rotated to control phase. Full-wave simulations and theoretical analysis based on Huygens principle and Love's equivalence principle are employed.
2：Sample Selection and Data Sources:
Unit cells are designed with specific materials (gold, ZnSe, YbF3) and simulated at infrared frequencies (e.g., 30 THz).
3：List of Experimental Equipment and Materials:
Materials include 50 nm thick gold elliptical patches, ZnSe and YbF3 dielectrics; fabrication methods involve focused ion beam (FIB) and chemical vapor deposition (CVD).
4：Experimental Procedures and Operational Workflow:
Simulations are conducted for refraction and focusing transmitarrays; surface currents are computed from sampled fields for far-field pattern calculations.
5：Data Analysis Methods:
Transmission efficiency, phase control, and far-field patterns are analyzed using simulation software.
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