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Towards Experimental Perfectly-Matched Layers With Ultra-Thin Metamaterial Surfaces

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8 Author(s)
Ye, D. ; Laboratory of Applied Research on Electromagnetics (ARE), Zhejiang University, Hangzhou, China ; Wang, Z. ; Wang, Z. ; Xu, K.
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In this paper, we modify uniaxial perfectly matched layer to an entirely passive medium and demonstrate its experimental realization using a deep sub-wavelength metamaterial surface. The relative permittivity and permeability of the surface are matched, mostly imaginary-valued, and far greater than unity. These conditions allow the impedance of the metamaterial surface to be completely matched to air, and produce an extremely large internal dissipation, resulting in a 99.97% power absorption at normal incidence and within a layer thickness of about 1/40 of the free space wavelength.

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Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 11 )