Input impedance, nanocircuit loading, and radiation tuning of optical nanoantennas

被引：302

作者：

Alu, Andrea ^{[1
]}

Engheta, Nader ^{[1
]}

机构：

[1] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.101.043901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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