研究目的
Investigating the analog of an optical waveguide based on cylindrical dielectric resonators in the microwave band to understand its frequency selective properties and energy localization.
研究成果
The waveguide based on modified cylindrical dielectric resonators exhibits high frequency selective properties and relatively low loss, with characteristics remaining stable even when bent by 90°. The cross section of energy localization is significantly smaller than the electromagnetic wavelength, similar to optical waveguides based on plasma oscillations in nanoparticles.
研究不足
The study is limited to the microwave band and uses dielectric resonators as analogs for optical waveguides based on metallic nanoparticles. The practical application in optical frequencies may require further optimization and study.
1：Experimental Design and Method Selection:
The study used modified cylindrical dielectric resonators made of high-frequency TBNS ceramics to simulate an optical waveguide in the microwave band. The resonators were designed to exhibit dipole and quadrupole oscillatory modes analogous to plasma oscillations in metallic nanoparticles.
2：Sample Selection and Data Sources:
The resonators were made of TBNS ceramics with a permittivity of ε = 80. The electromagnetic oscillation spectrum of the resonators was analyzed to identify the dipole and quadrupole modes.
3：The electromagnetic oscillation spectrum of the resonators was analyzed to identify the dipole and quadrupole modes.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Cylindrical dielectric resonators, TBNS ceramics, expanded polystyrene, Teflon rod, vector network analyzer, CST Microwave Studio program.
4：Experimental Procedures and Operational Workflow:
The resonators were modified by drilling a hole and dividing them into two parts filled with expanded polystyrene. The waveguides were assembled with resonators coupled in TM and LM configurations. The frequency responses were measured and analyzed.
5：Data Analysis Methods:
The frequency dependences of direct and return loss were measured using a vector network analyzer. The CST Microwave Studio program was used for numerical calculations and tuning of the waveguide models.
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