Input impedance, nanocircuit loading, and radiation tuning of optical nanoantennas
Input impedance, nanocircuit loading, and radiation tuning of optical nanoantennas
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DOI：
10.1103/physrevlett.101.043901
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发表时间：
2008-07-25
影响因子：
8.6
通讯作者：
Engheta, Nader
中科院分区：
文献类型：
--
作者：
Alu, Andrea;Engheta, Nader
在这里，我们探讨了光学纳米天线的辐射特性，分析了光输入阻抗，光辐射电阻，阻抗匹配和加载等离子体纳米偶极子的概念。我们将讨论如何天线阻抗的概念可能被应用到光的频率，以及它的数量可能被正确地定义和评估。我们利用这些概念在纳米天线加载光学纳米电路元件的优化，延长射频天线理论的经典概念，可见政权的适当设计和匹配的等离子体纳米天线。
Here we explore the radiation features of optical nanoantennas, analyzing the concepts of optical input impedance, optical radiation resistance, impedance matching, and loading of plasmonic nanodipoles. We discuss how the concept of antenna impedance may be applied to optical frequencies and how its quantity may be properly defined and evaluated. We exploit these concepts in the optimization of nanoantenna loading by optical nanocircuit elements, extending classic concepts of radio-frequency antenna theory to the visible regime for the proper design and matching of plasmonic nanoantennas.