Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas

Details Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas

2007-10-17

arxiv.org/abs/0710.3411v1

Physics

Condensed Matter

Materials Science

16 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.043901

Here we explore the radiation features of optical nanoantennas, analyzing the concepts of 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 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.

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