研究目的
To achieve simultaneous polarization conversion and wavefront control in the field of electromagnetics by designing chiral coding metasurfaces integrated with vanadium dioxide for thermo-optic modulation of terahertz waves.
研究成果
The study successfully designs and verifies chiral coding metasurfaces integrated with VO2 for thermo-optic modulation of terahertz waves. It demonstrates significant control over terahertz radiation fields, achieving high-efficiency focusing and divergence for CP waves. The work opens new avenues for designing functional terahertz devices and advancing the modulation of CP waves.
研究不足
The study is limited by the operational convenience and universality of design, focusing primarily on thermo-controlled phase change of VO2 in the terahertz region. The research also highlights the need for further exploration into independent and flexible regulation of LCP or RCP waves.
1：Experimental Design and Method Selection:
The study involves theoretical analysis and simulation of chiral coding metasurfaces based on the Pancharatnam-Berry (PeB) phase effect. The design includes integrating vanadium dioxide (VO2) to exploit its thermo-optic properties for modulating terahertz waves.
2：Sample Selection and Data Sources:
The research utilizes numerical simulations to optimize the geometric parameters of the double-layered VO2 composite aluminum antenna (DCAA) structure.
3：List of Experimental Equipment and Materials:
The study employs finite element method (FEM) for numerical simulation optimizations, with materials including aluminum, VO2, and polymide blocks.
4：Experimental Procedures and Operational Workflow:
The process involves designing chiral structures, simulating their electromagnetic responses, and analyzing the effects of temperature-induced phase changes in VO2 on terahertz wave modulation.
5：Data Analysis Methods:
The analysis includes calculating reflection amplitudes and phases, and evaluating the performance of the designed metasurfaces in terms of polarization conversion and wavefront control.
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