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Optical Engineering

Optical input impedance of nanostrip antennas
Author(s): Ivan Wang; Ya-ping Du
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Paper Abstract

We conduct an investigation into optical nanoantennas in the form of a strip dipole made from aluminum. With the finite-difference time domain simulation both optical input impedance and radiation efficiency of nanostrip antennas are addressed. An equivalent circuit is presented as well for the nanostrip antennas at optical resonances. The optical input resistance can be adjusted by varying the geometric parameters of antenna strips. By changing both strip area and strip length simultaneously, optical input resistance can be adjusted for matching impedance with an external feeding or loading circuit. It is found that the optical radiation efficiency does not change significantly when the size of a nanostrip antenna varies moderately.

Paper Details

Date Published: 4 May 2012
PDF: 6 pages
Opt. Eng. 51(5) 054002 doi: 10.1117/1.OE.51.5.054002
Published in: Optical Engineering Volume 51, Issue 5
Show Author Affiliations
Ivan Wang, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Ya-ping Du, The Hong Kong Polytechnic Univ. (Hong Kong, China)


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