Supplementary Information to A comparison of graphene, superconductors and metals as conductors for metamaterials and plasmonics

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Progress in superconducting metamaterials (2014, methodology): “The low loss properties of superconductors are particularly clear in the THz frequency scale.”
Graphene-based Plasmonic Nano-Antenna for Terahertz Band Communication in Nanonetworks (2013, unknown): “These materials support the propagation of SPP waves with high propagation lengths, in the order of a few tens of SPP wavelengths λ spp [36].”
Graphene-based nano-patch antenna for terahertz radiation (2012, background): “On the other hand, consistently with the behavior observed in infrared frequencies [21], graphene shows low propagation lengths of less than one SPP wavelength.”
Colloquium: Graphene spectroscopy (2014, background): “This consideration was not taken into account in a recent critique of graphene plasmonics (Tassin et al., 2012).”
Excitation of plasmonic waves in graphene by guided-mode resonances. (2012, background): “The extinction ratio (ER) of the GWR notch in the transmission spectra is largely determined by the optical loss in graphene, which is mainly characterized by the real part of the conductivity at the operating mid-IR frequency.(23) While the electron mobility in an exfoliated graphene can exceed 230”