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Bibliographic Details
Main Authors:	Feres, Flávio H., Maia, Francisco C. B., Chen, Shu, Mayer, Rafael A., Obst, Maximillian, Hatem, Osama, Wehmeier, Lukas, Nörenberg, Tobias, Queiroz, Matheus S., Mazzotti, Victor, Klopf, J. Michael, Kehr, Susanne C., Eng, Lukas M., Cadore, Alisson R., Hillenbrand, Rainer, Freitas, Raul O., Barcelos, Ingrid D.
Format:	Preprint
Published:	2025
Subjects:	Mesoscale and Nanoscale Physics Materials Science
Online Access:	https://arxiv.org/abs/2501.17340
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This study demonstrates that two-dimensional talc, a naturally abundant mineral, supports hyperbolic phonon-polaritons (HPhPs) at mid-infrared wavelengths, thus offering a low-cost alternative to synthetic polaritonic materials. Using scattering scanning near-field optical microscopy (s-SNOM) and synchrotron infrared nano spectroscopy (SINS), we reveal tunable HPhP modes in talc flakes of a long lifetime. These results highlight the potential of natural 2D talc crystals to constituting an effective platform for establishing scalable optoelectronic and photonic devices.

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