Planar hyperbolic polaritons in 2D van der Waals materials

Hongwei Wang, Anshuman Kumar, Siyuan Dai, Xiao Lin, Zubin Jacob, Sang Hyun Oh, Vinod Menon, Evgenii Narimanov, Young Duck Kim, Jian Ping Wang, Phaedon Avouris, Luis Martin Moreno, Joshua Caldwell, Tony Low

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Anisotropic planar polaritons - hybrid electromagnetic modes mediated by phonons, plasmons, or excitons - in biaxial two-dimensional (2D) van der Waals crystals have attracted significant attention due to their fundamental physics and potential nanophotonic applications. In this Perspective, we review the properties of planar hyperbolic polaritons and the variety of methods that can be used to experimentally tune them. We argue that such natural, planar hyperbolic media should be fairly common in biaxial and uniaxial 2D and 1D van der Waals crystals, and identify the untapped opportunities they could enable for functional (i.e. ferromagnetic, ferroelectric, and piezoelectric) polaritons. Lastly, we provide our perspectives on the technological applications of such planar hyperbolic polaritons.

Original languageEnglish (US)
Article number69
JournalNature communications
Issue number1
StatePublished - Dec 2024

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© 2024, The Author(s).

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  • Journal Article
  • Review

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