We demonstrate the possibility of using a two-dimensional array of spheroidal metallic nanoparticles embedded in a one-dimensional photonic crystal to obtain a narrow-bandpass, polarization-sensitive dichroic filter operating in the near-UV and visible domains. The optical anisotropy of the array of identically oriented nanoparticles results in two spectrally distinct plasmon resonances independently excited for two mutually orthogonal linear polarization states of light, which ensures polarization and spectral selectivity of the composite structure. The narrow transmission bands of the filter are defect modes due to a layer located at the center of the structure and hosting the nanoparticle array. In order to suppress these transmission windows, it is essential that the defect modes closely coincide with the plasmon resonances excited in the array. We show that the use of deterministic aperiodic distributed reflectors surrounding the defect layer makes it possible to adjust the spectral positions of two defect modes in two separate bandgaps in order to achieve such a coincidence. Among the various parameters governing the precise position of transmittivity windows of the filter, we establish the strong influence of the thickness of the defect layer. We also show that a strong localization of the optical field in the plane of the nanoparticle array is essential to enhance the efficiency of plasmonic excitation and obtain the desired control of the defect modes. Our study opens up possibilities for the further development of polarization-controlled nanophotonic devices.

中文翻译：

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具有二维金属纳米颗粒阵列作为偏振敏感二向色滤光片的确定性非周期性光子晶体

我们证明了使用嵌入一维光子晶体中的二维球形金属纳米颗粒阵列来获得在近紫外和可见光域中运行的窄带通、偏振敏感二向色滤光片的可能性。相同取向的纳米粒子阵列的光学各向异性导致两个光谱不同的等离子体共振独立激发光的两个相互正交的线性偏振态，这确保了复合结构的偏振和光谱选择性。由于位于结构中心并承载纳米颗粒阵列的层，滤波器的窄传输带是缺陷模式。为了抑制这些传输窗口，缺陷模式必须与阵列中激发的等离子体共振紧密一致。我们表明，在缺陷层周围使用确定性非周期性分布式反射器可以在两个单独的带隙中调整两个缺陷模式的光谱位置，以实现这种重合。在控制过滤器透射窗精确位置的各种参数中，我们确定了缺陷层厚度的强烈影响。我们还表明，纳米颗粒阵列平面中光场的强定位对于提高等离子体激发的效率和获得所需的缺陷模式控制至关重要。我们的研究为进一步开发偏振控制纳米光子器件开辟了可能性。我们表明，在缺陷层周围使用确定性非周期性分布式反射器可以在两个单独的带隙中调整两个缺陷模式的光谱位置，以实现这种重合。在控制过滤器透射窗精确位置的各种参数中，我们确定了缺陷层厚度的强烈影响。我们还表明，纳米颗粒阵列平面中光场的强定位对于提高等离子体激发的效率和获得所需的缺陷模式控制至关重要。我们的研究为进一步开发偏振控制纳米光子器件开辟了可能性。我们表明，在缺陷层周围使用确定性非周期性分布式反射器可以在两个单独的带隙中调整两个缺陷模式的光谱位置，以实现这种重合。在控制过滤器透射窗精确位置的各种参数中，我们确定了缺陷层厚度的强烈影响。我们还表明，纳米颗粒阵列平面中光场的强定位对于提高等离子体激发的效率和获得所需的缺陷模式控制至关重要。我们的研究为进一步开发偏振控制纳米光子器件开辟了可能性。