研究目的
To theoretically study whether the defective asymmetric Cantor photonic crystal (PC) exhibits unidirectional absorption properties, similar to the defective asymmetric bilayer PC.
研究成果
The defective asymmetric Cantor PC exhibits unidirectional absorption properties, with absorption spectra showing defect and non-defect modes. The stage numbers of the two ends are key parameters for the unidirectional absorption peaks. The interaction between defect and non-defect modes is superposition, indicating independent mechanisms.
研究不足
The study is theoretical and does not include experimental validation. The analysis is limited to one-dimensional photonic crystals and specific materials (n-InSb as the semiconductor).
1：Experimental Design and Method Selection:
The study uses the transfer matrix method (TMM) to analyze the optical properties of the one-dimensional PCs.
2：Sample Selection and Data Sources:
The considered PC structure is air/TCSN/A/TCSM/air, where TCSN is the N stage triadic Cantor structure composed of B and D; the semiconductor, n-InSb, is chosen as D.
3：List of Experimental Equipment and Materials:
The materials A and B are dielectrics with refractive indices nA =
4：3 and nB = 46, respectively. Experimental Procedures and Operational Workflow:
The absorptance, transmittance, and reflectance spectra are calculated for waves propagating in forward and reverse directions.
5：Data Analysis Methods:
The absorptance spectra are analyzed to identify defect and non-defect modes and their dependence on layer thicknesses and stage numbers.
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