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Aluminum Plasmonic Multicolor Meta-Hologram

机译:铝等离子多色全息图

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We report a phase-modulated multicolor meta-hologram (MCMH) that is polarization-dependent and capable of producing images in three primary colors. The MCMH structure is made of aluminum nanorods that are arranged in a two-dimensional array of pixels with surface plasmon resonances in red, green, and blue. The aluminum nanorod array is patterned on a 30 nm thick SiO2 spacer layer sputtered on top of a 130 nm thick aluminum mirror. With proper design of the structure, we obtain resonances of narrow bandwidths to allow for implementation of the multicolor scheme. Taking into account of the wavelength dependence of the diffraction angle, we can project images to specific locations with predetermined size and order. With tuning of aluminum nanorod size, we demonstrate that the image color can be continuously varied across the visible spectrum.
机译:我们报告了相位调制的多色亚全息图(MCMH),它与偏振有关,能够产生三种原色的图像。 MCMH结构由铝纳米棒制成,铝纳米棒排列在像素的二维阵列中,具有红色,绿色和蓝色的表面等离振子共振。铝纳米棒阵列在溅射在130 nm厚的铝镜顶部的30 nm厚的SiO2间隔层上进行构图。通过适当的结构设计,我们可以获得较窄带宽的谐振,从而可以实现多色方案。考虑到衍射角的波长依赖性,我们可以将图像投影到具有预定大小和顺序的特定位置。通过调整铝纳米棒的尺寸,我们证明了图像颜色可以在可见光谱范围内连续变化。

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