Two-dimensional talc as a natural abundant ultra-broadband hyperbolic material

Flávio H Feres^{1

2}, Francisco C B Maia¹, Shu Chen³, Victor Mazzotti^{1

4}, Rafael A Mayer^{1

5}, Maximilian Obst², Osama Hatem^{2

6}, Lukas Wehmeier⁷, Tobias Nörenberg², Matheus S Queiroz⁸, J Michael Klopf⁹, Susanne C Kehr², Lukas M Eng², Alisson R Cadore^{10

11}, Rainer Hillenbrand^{12

13}, Raul O Freitas¹, Ingrid D Barcelos¹

Affiliations

¹ Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil. ingrid.barcelos@lnls.br.
² Institute of Applied Physics, Technische Universität Dresden, Dresden 01062, Germany.
³ Terahertz Technology Innovation Research Institute, National Basic Science Center-Terahertz Science and Technology Frontier, Terahertz Precision Biomedical Discipline 111 Project, Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, China.
⁴ Institute of Mathematics, Statistics and Scientific Computing, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
⁵ Institute of Physics Gleb Wataghin, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
⁶ Department of Engineering Physics, Faculty of Engineering, Tanta University, Tanta 31511, Egypt.
⁷ National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.
⁸ Center for Research in Radiation Sciences and Technologies (CPqCTR), State University of Santa Cruz, Iheus, BA, Brazil.
⁹ Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany.
¹⁰ Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil.
¹¹ Programa de Pós-Graduação em Física, Instituto de Física, Universidade Federal de Mato Grosso, 78060-900, Cuiabá, Mato Grosso, Brazil.
¹² CIC nanoGUNE BRTA and Department of Electricity and Electronics at the University of the Basque Country (UPV/EHU), 20018 Donostia-San Sebastian, Spain.
¹³ IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain.

PMID: 41055003
DOI: 10.1039/d5nr02966j

Two-dimensional talc as a natural abundant ultra-broadband hyperbolic material

Flávio H Feres et al. Nanoscale. 2025.

. 2025 Oct 23;17(41):24151-24160.

doi: 10.1039/d5nr02966j.

Authors

Affiliations

¹ Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil. ingrid.barcelos@lnls.br.
² Institute of Applied Physics, Technische Universität Dresden, Dresden 01062, Germany.
³ Terahertz Technology Innovation Research Institute, National Basic Science Center-Terahertz Science and Technology Frontier, Terahertz Precision Biomedical Discipline 111 Project, Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, China.
⁴ Institute of Mathematics, Statistics and Scientific Computing, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
⁵ Institute of Physics Gleb Wataghin, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
⁶ Department of Engineering Physics, Faculty of Engineering, Tanta University, Tanta 31511, Egypt.
⁷ National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.
⁸ Center for Research in Radiation Sciences and Technologies (CPqCTR), State University of Santa Cruz, Iheus, BA, Brazil.
⁹ Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany.
¹⁰ Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil.
¹¹ Programa de Pós-Graduação em Física, Instituto de Física, Universidade Federal de Mato Grosso, 78060-900, Cuiabá, Mato Grosso, Brazil.
¹² CIC nanoGUNE BRTA and Department of Electricity and Electronics at the University of the Basque Country (UPV/EHU), 20018 Donostia-San Sebastian, Spain.
¹³ IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain.

PMID: 41055003
DOI: 10.1039/d5nr02966j

Abstract

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.

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Two-dimensional talc as a natural abundant ultra-broadband hyperbolic material

Affiliations

Two-dimensional talc as a natural abundant ultra-broadband hyperbolic material

Authors

Affiliations

Abstract

LinkOut - more resources

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