Two-dimensional talc as a natural abundant ultra-broadband hyperbolic material
We demonstrate that two-dimensional talc, a naturally abundant phyllosilicate mineral, supports hyperbolic phonon-polaritons (HPhPs) across the mid- and far-infrared wavelengths. Using scattering scanning near-field optical microscopy (s-SNOM) and synchrotron infrared nano-spectroscopy (SINS), we reveal tunable HPhP modes in talc flakes with long lifetimes, high confinement, and quality factors of up to 5. We further observe Fabry-Pérot cavity modes in tapered flakes, confirmed by simulations and analytical modeling. Compared to synthetic crystals, talc offers an ultra-broadband, low-cost, and sustainable platform for infrared nanophotonics and optoelectronics.
Authors
- Flávio H. Feres (ORCID: https://orcid.org/0000-0001-9812-974X)
- Raul O. Freitas (ORCID: https://orcid.org/0000-0002-3285-5447)
- Lukas Wehmeier (ORCID: https://orcid.org/0000-0001-8416-953X)
- Susanne C. Kehr (ORCID: https://orcid.org/0000-0002-3857-673X)
- Rainer Hillenbrand (ORCID: https://orcid.org/0000-0002-1904-4551)
- J. Michael Klopf (ORCID: https://orcid.org/0000-0002-3431-6666)
- Tobias Nörenberg (ORCID: https://orcid.org/0000-0001-6357-9345)
- Maximilian Obst (ORCID: https://orcid.org/0000-0003-0370-425X)
- Shu Chen (ORCID: https://orcid.org/0000-0001-6324-1950)
- Osama Hatem (ORCID: https://orcid.org/0000-0003-4746-0963)
- Alisson R. Cadore (ORCID: https://orcid.org/0000-0003-1081-0915)
- Lukas M. Eng (ORCID: https://orcid.org/0000-0002-2484-4158)
- Francisco C. B. Maia (ORCID: https://orcid.org/0000-0002-4998-4624)
- Rafael Mayer (ORCID: https://orcid.org/0000-0001-5367-9748)
- Victor Mazzotti
- Matheus S. Queiroz (ORCID: https://orcid.org/0009-0004-2270-1083)
- Ingrid D. Barcelos
Institutions
- Ikerbasque (ES)
- University of Shanghai for Science and Technology (CN)
- University of the Basque Country (ES)
- Universidade Estadual de Campinas (UNICAMP) (BR)
- Brookhaven National Laboratory (US)
- Tanta University (EG)
- Helmholtz-Zentrum Dresden-Rossendorf (DE)
- Universidade Estadual de Santa Cruz (BR)
- Universidade Federal de Mato Grosso (BR)
- Brazilian Synchrotron Light Laboratory (BR)
- Shenzhen Terahertz Technology Innovation Research Institute (CN)
- CIC nanoGUNE (ES)
- Brazilian Center for Research in Energy and Materials (BR)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- Nanoscale
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5nr02966j
- Citations
- 1
- Primary Topic
- Liquid Crystal Research Advancements
- Type
- article
- Field-Weighted Citation Impact
- 0.43