研究目的
To investigate the electromagnetic coupling effect in terahertz toroidal metasurfaces and metamaterials, focusing on the manipulation of resonance frequencies, electromagnetic distributions, and Q factor through the design of metamolecules and their stacking configurations.
研究成果
The research demonstrated that the EM coupling effect in TD MSs and TD MMs can efficiently manipulate resonance frequencies, EM distributions, and Q factors. The study highlighted the potential of these materials for applications in terahertz sensors and other functional devices, with the optimization of TD excitation offering a pathway to further increase the Q-factor of metamaterials.
研究不足
The study acknowledges limitations such as the limited resolution of measurements, imperfections in fabricated samples, and the deviation in the thickness of the polyimide substrate. These factors could lead to variations between measured and simulated results.
1：Experimental Design and Method Selection:
The study involved the design and fabrication of TD MSs and TD MMs with specific metamolecule structures to investigate their EM characteristics. Theoretical models and full-wave simulations were employed to analyze the EM interactions.
2：Sample Selection and Data Sources:
Samples were fabricated using conventional photolithography and metallization processes on polyimide substrates. THz-time domain spectroscopy (TDS) was used for characterization.
3：List of Experimental Equipment and Materials:
Polyimide substrate, aluminum metal for metallic patterns, vacuum coating equipment for deposition, and THz-TDS for measurements.
4：Experimental Procedures and Operational Workflow:
Fabrication of TD MSs and TD MMs samples, followed by THz transmission measurements and numerical simulations to analyze EM characteristics.
5：Data Analysis Methods:
Multipole decomposition was performed to quantify contributions to the macroscopic EM responses, and MATLAB programs were used for calculations based on current density distributions obtained from simulations.
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