CST – Computer Simulation Technology

Polarization conversion with elliptical patch nanoantennas

Title:
Polarization conversion with elliptical patch nanoantennas
Author(s):
Feng Wang, Ayan Chakrabarty, Fred Minkowski, Kai Sun, Qi-Huo Wei
Source:
Applied Physics Letters
Vol./Issue/Date:
Volume: 101, Issue: 2, 9 July 2012
Year:
2012
Page(s):
023101 - 023101-4
Keywords:
polarisation, light reflection, microstrip antenna arrays, nanophotonics, optical arrays, plasmonics
Abstract:
In this paper, we demonstrate arrays of optical patch nanoantennas can convert light polarization through reflection. By breaking the azimuthal symmetry, elliptical plasmonic patch nanoantennas exhibit both even and odd cavity modes, which can be expressed by Mathieu functions. It is shown that by properly orienting the incident polarization, a linearly polarized light in resonance with one cavity mode can be converted into an elliptical or circular polarization after reflection. Since the major cavity modes can be excited at all incident angles, the polarization conversion by these elliptical patch nanoantennas can be realized with wide range of incident angles.
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