研究目的
Designing a highly birefringent and low-loss photonic crystal fiber for terahertz wave transmission with improved mechanical stability and dispersion properties.
研究成果
The proposed photonic crystal fiber achieves extremely high birefringence (9.73 × 10?2) and low effective material loss (0.056 cm?1) at 1 THz, with flat dispersion profiles. It offers improved mechanical stability over previous designs and is feasible for fabrication using extrusion techniques, making it suitable for polarization-maintaining applications in terahertz communications and sensing.
研究不足
The study is based on numerical simulations without experimental validation. Fabrication challenges exist for non-circular airholes, and mechanical stability may be compromised at very low strut widths. The design is optimized for a specific frequency range (0.1-1.6 THz) and may not generalize to other regimes.
1：Experimental Design and Method Selection:
The study uses numerical simulations to design and analyze a photonic crystal fiber with an elliptic porous core and kagome lattice cladding. The finite element method (FEM) is employed for modal analysis.
2：Sample Selection and Data Sources:
The fiber design is based on geometric parameters such as core ellipticity, porosity, and strut width, with no physical samples used; all data is simulation-based.
3：List of Experimental Equipment and Materials:
The primary material is Topas polymer (refractive index n = 1.528). Simulation software COMSOL is used for computations.
4：528). Simulation software COMSOL is used for computations.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The cross-section is modeled with specified dimensions (e.g., major axis a, minor axis b, slot widths). A perfectly matched layer (PML) is applied as a boundary condition. Meshing involves fine element sizes for accuracy.
5：Data Analysis Methods:
Parameters like birefringence, effective material loss (EML), confinement loss (Lc), and dispersion are calculated using defined formulas and plotted against variables like frequency and ellipticity.
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