纳米光学八木天线的定向发射
Directional emission of light from a nano-optical Yagi-Uda antenna
摘要：
金属纳米颗粒的等离子体共振可以以与射频（RF）天线增强和引导来自电路的发射非常相同的方式增强和引导来自光学发射器的光。在RF范围中，用于高方向性的典型天线设计是八木宇田天线，其基本上由由单个馈电元件驱动的天线元件的一维阵列组成。在这里，我们提出了从纳米光学八木宇田天线组成的适当调谐的金纳米棒阵列的定向光发射的实验演示。我们的研究结果表明，纳米光学天线阵列是一个简单而有效的工具，用于空间控制的光发射。
英文摘要：
The plasmon resonance of metal nanoparticles can enhance and direct light from optical emitters in much the same way that radio frequency (RF) antennas enhance and direct the emission from electrical circuits. In the RF regime, a typical antenna design for high directivity is the Yagi-Uda antenna, which basically consists of a one-dimensional array of antenna elements driven by a single feed element. Here, we present the experimental demonstration of directional light emission from a nano-optical Yagi-Uda antenna composed of an array of appropriately tuned gold nanorods. Our results indicate that nano-optical antenna arrays are a simple but efficient tool for the spatial control of light emission.
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