含负折射率材料1维光子晶体的偏振无关非全向的缺陷模

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Polarization-independent and non-omnidirectional defect modes of one-dimensional photonic crystals with negative-index materials

1.
Key Laboratory of Micro/Nano Optoelectronic Devices of Ministry of Education,School of Computer and Communication,Hunan University,Changsha 410082,China;
2.
College of Information and Telecommunications Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China

摘要: 运用光学传输矩阵理论，研究了含负折射率材料1维光子晶体缺陷模的偏振特性。结果显示，零均折射率带隙中缺陷模对入射角和偏振有较强的依赖。通过对缺陷层参数的优化设计，得到了一系列的偏振无关非全向缺陷模，这是传统1维光子晶体中不能出现的。应用这些缺陷模，设计了低通、高通、带通空间滤波器。与传统光子晶体空间滤波器相比，这些空间滤波器具有偏振无关的优点。
- 光子晶体 /
- 负折射率材料 /
- 偏振无关缺陷模 /
- 空间滤波器
Abstract: Polarization properties of defect modes of one-dimensional photonic crystals with negative-index materials are investigated by optical transfer matrix method. It is found that the defect modes in the zero-average-index gap have a strong dependence on the incident angles and polarization. Through tuning the optimized parameters of the defect layer, a series of polarization-independent and non-omnidirectional defect modes is obtained with the increase of incident angle, which is not available in conventional one-dimensional photonic crystals. Based on these defect modes, we have designed low-, high- and band pass spatial filters which have a polarization-independent feature comparing with spatial filters of conventional photonic crystals.
- photonic crystals /
- negative-index materials /
- polarization-independent defect modes /
- spatial filters

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