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Vortical Reflection and Spiraling Fermi Arcs with Weyl Metamaterials.
- Source :
-
Physical review letters [Phys Rev Lett] 2020 Aug 28; Vol. 125 (9), pp. 093904. - Publication Year :
- 2020
-
Abstract
- Scatterings and transport in Weyl semimetals have caught growing attention in condensed matter physics, with observables including chiral zero modes and the associated magnetoresistance and chiral magnetic effects. Measurement of electrical conductance is usually performed in these studies, which, however, cannot resolve the momentum of electrons, preventing direct observation of the phase singularities in scattering matrix associated with Weyl point. Here we experimentally demonstrate a helical phase distribution in the angle (momentum) resolved scattering matrix of electromagnetic waves in a photonic Weyl metamaterial. It further leads to spiraling Fermi arcs in an air gap sandwiched between a Weyl metamaterial and a metal plate. Benefiting from the alignment-free feature of angular vortical reflection, our findings establish a new platform in manipulating optical angular momenta with photonic Weyl systems.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 125
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 32915597
- Full Text :
- https://doi.org/10.1103/PhysRevLett.125.093904