新型光子晶体滤波分束器融合设计
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宁波大学

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国家自然科学基金(62271273),宁波市自然科学基金(2022J097)


Design of a novel photonic crystal filtering beam splitter
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1.Ningbo University;2.Ningbo university

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    摘要:

    基于对光分束器与滤波器这两类光子晶体功能器件结构的研究,本文设计了一款全新结构的二维三角晶格光子晶体滤波分束器,能够同时实现功率分束和滤波的功能。利用时域有限差分法分析光波在新结构中的传输特性。结果表明所提出的结构成功融合了滤波和分束两种特性,在不同波长的入射光情况下能同时实现良好的滤波和分束两种功能。对于波长为1.527μm和1.550μm的光波,入射光波基本对称分束输出,透射率分别为66.77%和95.22%。同时,对于这两个波长的入射光波,该结构同时具有较好的滤波性能,对应的滤波效率分别为70.62%和92.76%。此外,该结构对于波长为1.577μm的入射光波主要起到滤波功能,滤波效率达到了98.11%。

    Abstract:

    Based on the research on the structures of two types of photonic crystal functional devices, optical beam splitters, and filters, this paper designs a novel two-dimensional triangular lattice photonic crystal filtering beam splitter, which can simultaneously achieve power beam splitting and filtering functions. The finite difference time domain method were used to analyze the transmission characteristics of light waves in the new structure. The results show that the proposed structure successfully integrates the characteristics of filtering and beam splitting, and can simultaneously achieve good filtering and beam splitting functions under different incident wavelengths. For a wavelength of 1.527μm and 1.550μm, the incident light wave is basically symmetrically split and output, with transmittance of 66.77% and 95.22%, respectively. Meanwhile, for the incident light waves of these two wavelengths, the structure also has good filtering performance, with corresponding filtering efficiencies of 70.62% and 92.76%, respectively. In addition, for a wavelength of 1.577μm, the structure mainly functions as a filter, with a filtering efficiency of 98.11%.

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  • 收稿日期:2023-10-09
  • 最后修改日期:2023-12-08
  • 录用日期:2023-12-18
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