Moire Hyperbolic Metasurfaces
Top Cited Papers
- 13 May 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 20 (5), 3217-3224
- https://doi.org/10.1021/acs.nanolett.9b05319
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 moire 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 moire 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 moire physics and twistronic concepts.Keywords
Funding Information
- Air Force Office of Scientific Research
- National Research Foundation Singapore (NRF-CRP15-2015-03)
- Office of Naval Research
- National Science Foundation
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