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Journal of Nanophotonics

Optical resonant Archimedean spiral antennas
Author(s): Hanqing Wen; Jing Yang; Weiwei Zhang; Jiasen Zhang
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Paper Abstract

We investigated the field enhancement properties of optical resonant Archimedean spiral antennas by using a finite difference time domain method. Due to the spiral structure, the antennas show a circular dichroism in the electric field enhancement, especially for a large turning angle. A large magnetic field enhancement is also obtained with a confinement in the nanometer size. When the turning angle equals π for a linearly polarized incident beam, the polarization of the enhanced field in the spiral antenna can be perpendicular to the incident polarization with a similar enhancement factor to the optical resonant dipole antennas.

Paper Details

Date Published: 1 January 2011
PDF: 8 pages
J. Nanophoton. 5(1) 053523 doi: 10.1117/1.3643270
Published in: Journal of Nanophotonics Volume 5, Issue 1
Show Author Affiliations
Hanqing Wen, Peking Univ. (China)
Jing Yang, Peking Univ. (China)
Weiwei Zhang, Peking Univ. (China)
Jiasen Zhang, Peking Univ. (China)

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