研究目的
Investigating the existence of defects’ modes in the transmission spectrum of a one-dimensional photonic star waveguide structure and analyzing their behavior as a function of various parameters to design a selective filter with high performance.
研究成果
The study demonstrates that introducing defects in a one-dimensional photonic star waveguide structure can create localized defects’ modes within the forbidden bands. These modes can be tuned by varying the defects’ lengths, positions, and the number of defective resonators, making the structure suitable for designing high-performance electromagnetic filters. The results align with previous theoretical and experimental findings, validating the approach.
研究不足
The study is theoretical and relies on numerical simulations. Experimental validation is suggested by comparing with existing theoretical and experimental results. The quality factor and transmission coefficient are sensitive to the structure's parameters, indicating potential areas for optimization.
1：Experimental Design and Method Selection:
The study employs the interface response theory based on the Green Function method to analyze the propagation of electromagnetic waves in photonic star waveguide structures with defects.
2：Sample Selection and Data Sources:
The structure consists of a finite 1D periodicity of the backbone with grafted lateral branches acting as resonators. Defects are introduced at the resonators' level in two different sites.
3：List of Experimental Equipment and Materials:
The study uses dielectric permittivity (ε1= ε2 =
4：3) and magnetic permeability (μ1 = μ2 = 1) for the materials. The length of the backbones is d1 = 1, and the length of the resonators is d2 = 5dExperimental Procedures and Operational Workflow:
The behavior of defects’ modes is analyzed by varying defects’ lengths, the number of defective resonators, their positions, and the number of sites.
5：Data Analysis Methods:
The transmission coefficient, phase, and phase time are calculated to study the properties of the defects’ modes.
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