研究目的
Investigating the performance of an effective-medium-cladded waveguide for terahertz operation, focusing on achieving low loss, low dispersion, and broad bandwidth.
研究成果
The proposed effective-medium-cladded dielectric waveguide operates with a single dominant mode and an average attenuation coefficient around 0.05 dB/cm over the frequency range from 220 to 330 GHz. It offers a self-supporting structure that can accommodate various passive and active components, making it suitable for terahertz integrated circuits.
研究不足
The study focuses on simulation results and does not provide experimental validation. The fabrication complexity and potential additional transmission losses from introducing an additional clad material are noted as challenges.
1：Experimental Design and Method Selection:
The waveguide design involves etching from a single silicon wafer with specific dimensions and properties. The effective medium is realized by perforating the silicon slab with a subwavelength period.
2：Sample Selection and Data Sources:
A high-resistivity silicon wafer with a thickness of 200 μm, relative permittivity of 11.68, and resistivity of 20 kΩ-cm is used.
3：68, and resistivity of 20 kΩ-cm is used.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Silicon wafer, perforation tools for creating the effective medium.
4：Experimental Procedures and Operational Workflow:
The waveguide core is surrounded by an in-plane effective medium created by periodically perforating the silicon slab. The dispersion characteristics are analyzed based on Marcatili’s dielectric waveguide theory.
5：Data Analysis Methods:
The transmission coefficients and attenuation coefficients are simulated and compared for waveguides with different claddings.
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