This paper uses finite-difference time-domain modeling to study the impact of varying the polarization of the point source(s) on both a single aluminum dipole nanoantenna and a 2 x 2 array. Starting with the single dipole nanoantenna, this paper demonstrates the strong dependence of power enhancement and resonance on the polarization of the source by alternating between orthogonal polarization states. With each element of the array excited by a single point source, the resonance, power enhancement, and far-field radiation patterns are observed as the polarization of each source is rotated, in varying combinations. The results demonstrate that a unique far-field radiation pattern is produced for each polarization combination, which may lead to applications in subdiffraction limit imaging and quantum optics. (C) 2015 Optical Society of America
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机译：本文使用有限差分时域建模来研究改变点源极化对单个铝偶极纳米天线和2 x 2阵列的影响。从单偶极纳米天线开始，本文证明了通过正交极化状态之间的交替，功率增强和共振对源极化的强烈依赖性。在阵列的每个元素被单点光源激发的情况下，随着每个光源的偏振旋转（以不同的组合），会观察到共振，功率增强和远场辐射图。结果表明，每种偏振组合均产生独特的远场辐射图，这可能导致其在亚衍射极限成像和量子光学中的应用。 （C）2015年美国眼镜学会
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