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Moiré Hyperbolic Metasurfaces.

Guangwei Hu1,2, Alex Krasnok2,3, Yarden Mazor3

  • 1Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583.

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|April 17, 2020
PubMed
Summary
This summary is machine-generated.

Researchers explored moiré hyperbolic plasmons in hyperbolic metasurfaces (HMTSs), demonstrating mesoscopic phenomena analogous to atomic-scale twistronics. This work introduces novel metasurface optics applications using moiré physics and twistronic concepts.

Keywords:
graphene plasmonshyperbolic metasurfacemoiré physicstopological transitiontwistronics

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Area of Science:

  • Condensed matter physics
  • Metasurface optics
  • Plasmonics

Background:

  • Twistronics in low-dimensional materials reveals unique moiré physics phenomena.
  • Achieving these effects often requires atomic-scale superlattice manipulation.
  • Hyperbolic metasurfaces (HMTSs) support directional surface waves.

Purpose of the Study:

  • To investigate moiré hyperbolic plasmons in coupled HMTSs.
  • To explore phenomena analogous to atomic-scale twistronics at the mesoscopic scale.
  • To demonstrate novel applications in metasurface optics.

Main Methods:

  • Evanescently coupling pairs of hyperbolic metasurfaces (HMTSs).
  • Rotating the HMTSs relative to each other to engineer moiré patterns.
  • Analyzing the resulting plasmonic properties and phenomena.

Main Results:

  • Observation of rich dispersion engineering in moiré hyperbolic plasmons.
  • Discovery of topological transitions at specific 'magic angles'.
  • Demonstration of broadband field canalization and plasmon spin-Hall effects.

Conclusions:

  • Moiré hyperbolic plasmons enable mesoscopic analogues of twistronic phenomena.
  • This approach offers new avenues for advanced metasurface optics.
  • The findings enrich metasurface optics with moiré physics and twistronic concepts.