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The Design and Characterization of Three-Dimension Metamaterial for Terahertz Frequencies

We present the design and characterization of a three-dimension metamaterial consisted of a Jerusalem cross unit cell on the each side of cube lattice substrate for terahertz frequencies. The retrieved effective medium parameters from scattering data prove that the three-dimension metamaterial has a negative permeability and permittivity in wide frequencies range of 1.47-1.73 THz. We demonstrate that the three-dimension can be regarded as a polarization insensitive absorber with an absorptivity of 46% at 1.49 THz. Such designed materials may find numerous applications ranging from the active element in a thermal detector to terahertz stealth technology.