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首页> 外文期刊>Optical and quantum electronics >Multichannel filter application of a magnetized cold plasma defect in periodic structure of ZnS/TiO_2 materials
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Multichannel filter application of a magnetized cold plasma defect in periodic structure of ZnS/TiO_2 materials

机译：磁化冷等离子体缺陷在ZnS / TiO_2材料周期性结构中的多通道过滤应用

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摘要

In this article, transmission spectra of multilayer structure of zinc sulfide (ZnS) and titanium dioxide (TiO2) with defect of magnetized cold plasma (MCP) have been calculated theoretically by using characteristics transfer matrix method. The transmission spectra versus frequency have been analyzed for symmetric and asymmetric structure. Due to have a multiple band gaps in the asymmetric structure, we have taken the asymmetric structure for analysis with the parameters of MCP and the thicknesses of the dielectric materials. It is well known that magnetized cold plasma is an abnormal material because the permittivity changes with applied external magnetic field, and shows tunable photonic band gap for permittivity of the MCP. Now, the transmission spectra of the asymmetric structure versus frequency by inserting one or two magnetized cold plasma layer were analyzed with the variation of incident angles, the parameters of MCP, and the thicknesses of ZnS and TiO2 material. The analyzed transmission spectra of asymmetric structure with the variation of electron density, thicknesses of dielectric materials were obtained better results with defect of two plasma layers as compare to the defect of one layer of plasma. These obtained results reveal that the defect of two magnetized cold plasma layers of one dimensional asymmetric structure of ZnS, TiO2 may be used for the tunable multichannel filter at microwave region.
机译：本文利用特征转移矩阵法从理论上计算了具有磁化冷等离子体（MCP）缺陷的硫化锌（ZnS）和二氧化钛（TiO2）多层结构的透射光谱。对于对称和不对称结构，已经分析了透射光谱与频率的关系。由于不对称结构中存在多个带​​隙，因此我们采用非对称结构进行了分析，并使用MCP的参数和介电材料的厚度进行了分析。众所周知，磁化的冷等离子体是异常材料，因为介电常数会随着所施加的外部磁场而变化，并显示出MCP介电常数的可调光子带隙。现在，通过入射角，MCP参数以及ZnS和TiO2材料的厚度变化，分析了通过插入一或两个磁化冷等离子体层而得到的不对称结构随频率的透射光谱。分析了不对称结构随电子密度，介电材料厚度的变化而产生的透射光谱，与一层等离子体的缺陷相比，具有两层等离子体的缺陷获得了更好的结果。这些获得的结果表明，ZnS，TiO2一维不对称结构的两个磁化冷等离子体层的缺陷可用于微波区域的可调多通道滤波器。

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