CST – Computer Simulation Technology

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

Title:
Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas
Author(s):
Andrea Alu, Nader Engheta
Source:
PHYSICAL REVIEW LETTERS
Vol./Issue/Date:
21 July 2008
Year:
2008
Page(s):
043901-1 - 043901-4
Abstract:
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.
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