Plasmon canalization and tunneling over anisotropic metasurfaces

Diego Correas-Serrano, Andrea Alù, Juan Sebastian Gomez Diaz

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


We discuss the possibility of plasmon canalization, collimation, and tunneling over ultrathin metasurfaces, enabled by extreme anisotropy in their complex conductivity dyadic. The interplay between anisotropy, conductivity-near-zero, and loss is exploited here to derive general conditions for plasmon canalization and efficient energy transport. We also demonstrate how the intrinsic in-plane anisotropy of black phosphorus can provide a natural platform to engineer these conditions, exhibiting important advantages over isotropic plasmonic materials. Our findings have implications for plasmonic sensors, planar hyperlenses, and plasmon steering over a surface, and they highlight the potential of two-dimensional materials beyond graphene.

Original languageEnglish (US)
Article number075436
JournalPhysical Review B
Issue number7
StatePublished - Aug 28 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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