Surface Metallic Pattern for Enhancement of a THz Field in a Two-Dimensional Electron Plasma
T. Tarkowski and J. Ćusakowski
Faculty of Physics, University of Warsaw, L. Pasteura 5, 02-093 Warsaw, Poland
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A metamaterial in the form: of a periodic lattice of split-ring resonators on a GaAs/AlGaAs heterostructure was numerically studied at terahertz frequencies. A finite-difference time-domain algorithm was applied to calculate distribution of the electromagnetic field in the layer positioned at 100 nm below the heterostructure surface where a two-dimensional electron gas typically resides in real structures. The results allowed to determine the resonant frequencies of the metamaterial as well as an enhancement factor of the electric field as a function of the period of the metamaterial's lattice.

DOI: 10.12693/APhysPolA.132.332
topics: Metamaterials, THz field enhancement