Journal
SCIENCE ADVANCES
Volume 8, Issue 43, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.add6169
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Funding
- DOE-BES [DE-SC0018426]
- Vannevar Bush Faculty Fellow ONR-VB [N00014-19-1-2630]
- Vannevar Bush Faculty Fellowship ONR-VB [N00014-19-1-2630]
- Moore Investigator in Quantum Materials [EPIQS GBMF9455]
- Programmable Quantum Materials, an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0019443]
- National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF [DMR-1539916, DMR-2039351]
- European Research Council [ERC-2015-AdG-694097]
- Grupos Consolidados [IT1249-19]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy -Cluster of Excellence and Advanced Imaging of Matter (AIM) [EXC 2056 -390715994, RTG 2247]
- Max Planck-New York City Center for Nonequilibrium Quantum Phenomena
- [SFB925]
- U.S. Department of Energy (DOE) [DE-SC0018426] Funding Source: U.S. Department of Energy (DOE)
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Metals are effective media for guiding and manipulating light at the nanoscale. In this study, propagating hyperbolic waves were observed in a layered nodal-line semimetal, enabled by the polaritonic hybridization between near-infrared light and nodal-line plasmons.
Metals are canonical plasmonic media at infrared and optical wavelengths, allowing one to guide and manipulate light at the nanoscale. A special form of optical waveguiding is afforded by highly anisotropic crystals revealing the opposite signs of the dielectric functions along orthogonal directions. These media are classified as hyperbolic and include crystalline insulators, semiconductors, and artificial metamaterials. Layered anisotropic metals are also anticipated to support hyperbolic waveguiding. However, this behavior remains elusive, primarily because interband losses arrest the propagation of infrared modes. Here, we report on the observation of propagating hyperbolic waves in a prototypical layered nodal-line semimetal ZrSiSe. The observed waveguiding originates from polaritonic hybridization between near-infrared light and nodal-line plasmons. Unique nodal electronic structures simultaneously suppress interband loss and boost the plasmonic response, ultimately enabling the propagation of infrared modes through the bulk of the crystal.
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