Balaur Eugeniu, Sadatnajafi Catherine, Kou Shan Shan, Lin Jiao, Abbey Brian
Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia.
Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria 3086, Australia.
Sci Rep. 2016 Jun 17;6:28062. doi: 10.1038/srep28062.
Colour filters based on nano-apertures in thin metallic films have been widely studied due to their extraordinary optical transmission and small size. These properties make them prime candidates for use in high-resolution colour displays and high accuracy bio-sensors. The inclusion of polarization sensitive plasmonic features in such devices allow additional control over the electromagnetic field distribution, critical for investigations of polarization induced phenomena. Here we demonstrate that cross-shaped nano-apertures can be used for polarization controlled color tuning in the visible range and apply fundamental theoretical models to interpret key features of the transmitted spectrum. Full color transmission was achieved by fine-tuning the periodicity of the apertures, whilst keeping the geometry of individual apertures constant. We demonstrate this effect for both transverse electric and magnetic fields. Furthermore we have been able to demonstrate the same polarization sensitivity even for nano-size, sub-wavelength sets of arrays, which is paramount for ultra-high resolution compact colour displays.
基于薄金属膜中纳米孔的滤色器因其非凡的光传输特性和小尺寸而受到广泛研究。这些特性使其成为高分辨率彩色显示器和高精度生物传感器的理想选择。在此类器件中加入偏振敏感的等离子体特性可对电磁场分布进行额外控制，这对于研究偏振诱导现象至关重要。在此，我们证明十字形纳米孔可用于可见光范围内的偏振控制颜色调谐，并应用基本理论模型来解释透射光谱的关键特征。通过微调孔的周期性实现了全彩色透射，同时保持单个孔的几何形状不变。我们在横向电场和磁场中均展示了这种效应。此外，即使对于纳米尺寸的亚波长阵列组，我们也能够证明相同的偏振敏感性，这对于超高分辨率紧凑型彩色显示器至关重要。
