1 January 2011 Optical resonant Archimedean spiral antennas
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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.
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hanqing Wen, Hanqing Wen, Jing Yang, Jing Yang, Weiwei Zhang, Weiwei Zhang, Jiasen Zhang, Jiasen Zhang, } "Optical resonant Archimedean spiral antennas," Journal of Nanophotonics 5(1), 053523 (1 January 2011). https://doi.org/10.1117/1.3643270 . Submission:

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