Terahertz response of patterned epitaxial graphene
Abstract
We study the interaction between polarized terahertz (THz) radiation and micro-structured large-area graphene in transmission geometry. In order to efficiently couple the radiation into the two-dimensional material, a lateral periodic patterning of a closed graphene sheet by intercalation doping into stripes is chosen, yielding unequal transmittance of the radiation polarized parallel and perpendicular to the stripes. Indeed, a polarization contrast up to 20% is observed. The effect even increases up to 50% when removing graphene stripes in analogy to a wire grid polarizer. The polarization dependence is analyzed in a large frequency range from < 80 GHz to 3 THz, including the plasmon-polariton resonance. The results are in excellent agreement with theoretical calculations based on the electronic energy spectrum of graphene and the electrodynamics of the patterned structure.
Cite
@article{arxiv.1410.1273,
title = {Terahertz response of patterned epitaxial graphene},
author = {C. Sorger and S. Preu and J. Schmidt and S. Winnerl and Y. V. Bludov and N. M. R. Peres and M. I. Vasilevskiy and H. B. Weber},
journal= {arXiv preprint arXiv:1410.1273},
year = {2015}
}