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Optical resonant Archimedean spiral antennas
WEN Hanqing 1,HAN Xu 2,JI Xiang 2,YANG Jing 2,ZHANG Weiwei 2,ZHANG Jiasen 2 * #
1.School of Physics, Peking University
2.School of Physics, Peking University, Beijing 100871
*Correspondence author
#Submitted by
Subject:
Funding: none
Opened online: 7 September 2011
Accepted by: none
Citation: WEN Hanqing,HAN Xu,JI Xiang.Optical resonant Archimedean spiral antennas[OL]. [ 7 September 2011] http://en.paper.edu.cn/en_releasepaper/content/4441593
 
 
Field enhancement properties of optical resonant Archimedean spiral antennas are presented using finite difference time domain method. Due to the spiral structure, the antennas show 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 180 degree, 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.
Keywords:Optics; optical resonant antennas; Archimedean spiral antennas; circular dichroism; field enhancement
 
 
 

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