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In this paper, we propose a chiral metamaterial structure that enables dual-band asymmetric transmission effect for different linearly polarized electromagnetic waves. The metamaterial is composed of metallic spirals with two split-ring resonators sandwiching a dielectric slab and connecting with via hole. Strong one-way transmission of two orthogonally polarized waves at different frequency bands...
On the basis of transformation optics, we propose an approach to couple surface plasmon waves across gaps in a dielectric/metal interface. The coupler employs a slab of complementary medium with negative refraction index to virtually bridge the gap by optically compensating the rest air region in the gap. Several design examples through transformation optics have been demonstrated which could enable...
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