Moiré Hyperbolic Metasurfaces

Guangwei Hu, Alex Krasnok, Yarden Mazor, Cheng Wei Qiu, Andrea Alù

Research output: Contribution to journalArticlepeer-review

Abstract

Recent advances in twistronics of low-dimensional materials, such as bilayer graphene and transition-metal dichalcogenides, have enabled a plethora of unusual phenomena associated with moiré physics. However, several of these effects require demanding manipulation of superlattices at the atomic scale, such as the careful control of rotation angle between two closely spaced atomic lattices. Here, we study moiré hyperbolic plasmons in pairs of hyperbolic metasurfaces (HMTSs), unveiling analogous phenomena at the mesoscopic scale. HMTSs are known to support confined surface waves collimated toward specific directions determined by the metasurface dispersion. By rotating two evanescently coupled HMTSs with respect to one another, we unveil rich dispersion engineering, topological transitions at magic angles, broadband field canalization, and plasmon spin-Hall phenomena. These findings open remarkable opportunities to advance metasurface optics, enriching it with moiré physics and twistronic concepts.

Original languageEnglish
Pages (from-to)3217-3224
Number of pages8
JournalNano Letters
Volume20
Issue number5
DOIs
StatePublished - 13 May 2020
Externally publishedYes

Keywords

  • graphene plasmons
  • hyperbolic metasurface
  • moiré physics
  • topological transition
  • twistronics

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science

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