研究目的
To study the evolution of the waveguide mode bands, and the mechanism of the band merging and the exceptional point forming in conventional photonic crystal waveguides combined with the Parity-Time (PT) symmetry configuration.
研究成果
The study discloses a new optical localized state through the embedded waveguide localized band (EWLB) in PT-symmetry photonic crystal waveguides. The EWLB, part of which is embedded into the bulky bands, shows mode fields mainly localized within the waveguide. The exceptional points on the EWLB excite asymmetric mode fields and amplified transmission, indicating unique properties compared to conventional localized states.
研究不足
The study is limited to theoretical analysis and simulations based on specific configurations of photonic crystal waveguides and PT-symmetry. Practical implementation and experimental validation are not covered.
1：Experimental Design and Method Selection:
The study involves the use of conventional photonic crystal waveguides combined with the PT-symmetry configuration to analyze the evolution of waveguide mode bands.
2：Sample Selection and Data Sources:
A two-dimensional photonic crystal with a triangular lattice and a line defect waveguide is used.
3：List of Experimental Equipment and Materials:
The setup includes dielectric rods with specific refraction indexes to form the PT-symmetry configuration.
4：Experimental Procedures and Operational Workflow:
The study involves frequency domain simulations and eigenfrequency band analysis.
5：Data Analysis Methods:
The analysis includes plotting eigenfrequency bands and mode fields, and performing frequency domain simulations to study the properties of the embedded waveguide localized band (EWLB) and exceptional points.
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