Plasmonic planar antenna for wideband and efficient linear polarization conversion
- 17 March 2014
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 104 (11)
- https://doi.org/10.1063/1.4869127
Abstract
In this Letter, we demonstrate both theoretically and experimentally that plasmonic planar L-shaped antenna can nearly totally convert the linear polarization of light with a high efficiency in the infrared (3–5 μm). The nanoantenna geometry is engineered so that the polarization conversion occurred on a 1 μm-wide band ([3.25–4.25] μm) with a mean polarization conversion ratio of 95%. We show that this effect is due to two localized resonances in the L-shaped antenna, which wavelengths are tunable with the in-plane geometry of the nanoantenna. Eventually, the angular independence of the polarization conversion effect is evidenced.Keywords
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