研究目的
To theoretically investigate the optical properties, specifically the reflectance characteristics, of ternary superconducting planar and annular photonic crystals in the near-zero-permittivity operation range, focusing on the superpolariton gap and reflection dips for TM waves.
研究成果
The study demonstrates that ternary superconducting photonic crystals exhibit a superpolariton gap and reflection dips in TM reflectance spectra, which are tunable with parameters such as incident angle, azimuthal mode number, starting radius, temperature, dielectric refractive indices, and thicknesses. These findings have potential applications in designing optical filters and other photonic devices.
研究不足
The study is theoretical and does not involve experimental validation. It focuses on specific materials and parameters, and the applicability may be limited to the assumed conditions. Potential optimizations could include experimental verification and exploration of other superconducting materials or structures.
1：Experimental Design and Method Selection:
The study uses theoretical modeling based on the transfer matrix method (TMM) in Cartesian coordinates for planar structures and cylindrical coordinates for annular structures. The electrodynamics of the superconductor are modeled using the two-fluid model.
2：Sample Selection and Data Sources:
The structures consist of layers A and C as dielectrics (SrTiO3 and Al2O3) and layer B as a high-temperature superconductor (YBa2Cu3O7). Parameters such as refractive indices, thicknesses, and operating temperatures are specified.
3：7). Parameters such as refractive indices, thicknesses, and operating temperatures are specified. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: No specific equipment is mentioned as the study is theoretical; materials include SrTiO3, Al2O3, and YBCO superconductor.
4：Experimental Procedures and Operational Workflow:
Calculations involve varying incident angles, azimuthal mode numbers, starting radii, temperatures, dielectric refractive indices, and thicknesses to compute TM reflectance spectra.
5：Data Analysis Methods:
Reflectance is calculated using TMM, and results are analyzed to observe the superpolariton gap and reflection dips.
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