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首页> 外文期刊>Optical and quantum electronics >Designing tunable narrow band filters using a plasma photonic crystal structure with sinusoidal modulated plasma defect layer
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Designing tunable narrow band filters using a plasma photonic crystal structure with sinusoidal modulated plasma defect layer

机译：使用具有正弦调制等离子体缺陷层的等离子体光子晶体结构设计可调窄带滤波器

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In this work, we have designed tunable narrow band filters using symmetric and asymmetric one-dimensional plasma photonic crystal structures. Both proposed structures contain a plasma defect layer that its electron density and therefore the refractive index can be modulated sinusoidally by an external electric or acoustic fields. The transmittance spectrum is obtained by using the transfer matrix method. The results have shown that in symmetric and asymmetric structures, one and two very sharp localized defect mode appears in the photonic band gap, respectively. The frequency of the defect modes and their transmittance intensity are studied by changing the amplitude and frequency of the applied external field to the plasma defect layer. It is observed that by increasing the modulation frequency and its amplitude, the defect mode frequencies change and shift toward the lower frequencies that can be introduced as tunable narrow band filters.
机译：在这项工作中，我们使用对称和非对称的一维等离子体光子晶体结构设计了可调谐窄带滤波器。两个所提出的结构含有等离子体缺陷层，其电子密度，因此可以通过外部电气或声场正弦地调制折射率。通过使用转移矩阵方法获得透射谱。结果表明，在对称和不对称结构中，分别在光子带隙中出现一个和两个非常尖锐的局部缺陷模式。通过将应用的外部场的幅度和频率改变为等离子体缺陷层来研究缺陷模式的频率及其透射率强度。观察到，通过增加调制频率及其幅度，缺陷模式频率改变并朝向可以作为可调谐窄带滤波器引入的较低频率的变化。

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