Tracing terahertz plasmon polaritons with a tunable-by-design dispersion in topological insulator metaelements.

Leonardo Viti, Chiara Schiattarella, Lucia Sichert, Zhengtianye Wang, Stephanie Law, Oleg Mitrofanov, Miriam S Vitiello

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Article in Light, science & applications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

7 authors.

Leonardo Viti *NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy.ORCID http://orcid.org/0000-0002-4844-2081

Chiara Schiattarella *NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy.

Lucia SichertNEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy.

Zhengtianye WangDepartment of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA.ORCID http://orcid.org/0000-0001-6457-1206

Stephanie LawMaterials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.

Oleg MitrofanovUniversity College London, Electronic and Electrical Engineering, London, WC1E 7JE, UK.ORCID http://orcid.org/0000-0003-3510-2675

Miriam S VitielloNEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy. miriam.vitiello@sns.it.ORCID http://orcid.org/0000-0002-4914-0421

Funding

EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council) 101081567

6 · The paper itself

Abstract

Collective oscillations of massless charge carriers in two-dimensional materials-Dirac plasmon polaritons (DPPs)-are of paramount importance for engineering nanophotonic devices with tunable optical response. However, tailoring the optical properties of DPPs in a nanomaterial is a very challenging task, particularly at terahertz (THz) frequencies, where the DPP momentum is more than one order of magnitude larger than that of the free-space photons, and DDP attenuation is high. Here, we conceive and demonstrate a strategy to tune the DPP dispersion in topological insulator metamaterials. We engineer laterally coupled linear metaelements, fabricated from epitaxial Bi

Identifiers

PMID40858530

DOI10.1038/s41377-025-01884-0

PMCPMC12381016

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