13 November 2014 Beam manipulation in a bilayered gradient metamaterial
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We propose an ultrathin planar metamaterial with an abrupt phase change along its surface for beam manipulation. The metamaterial is composed of bilayered asymmetrical split ring apertures (ASRAs) on either side of a dielectric substrate. The proposed metamaterial relies on eight variable ASRAs in a super cell to modulate the phase of transmitted wave. Efficient beam direction manipulation for cross-polarization transmission has been achieved and co-polarization transmission has been completely suppressed. Numerical simulation results show that the linearly polarized incident wave can deflect in a designated direction passing through the ultrathin metamaterial. An intensity efficiency of 70% and a deflection angle of 24° at 6.2GHz have been verified.
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Quanchao Shi, Quanchao Shi, Guangyu Nie, Guangyu Nie, Zheng Zhu, Zheng Zhu, Yang Liu, Yang Liu, Jinhui Shi, Jinhui Shi, "Beam manipulation in a bilayered gradient metamaterial", Proc. SPIE 9278, Plasmonics, 927818 (13 November 2014); doi: 10.1117/12.2071454; https://doi.org/10.1117/12.2071454


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