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Showing 1–6 of 6 results
Advanced filters: Author: A. I. F. Tresguerres-Mata Clear advanced filters

  • Canalized polaritons are light-matter excitations characterized by intrinsic collimation of electromagnetic energy along a specific crystal axis. Here, the authors report the observation of intrinsically canalized phonon polaritons in a single thin layer of a van der Waals crystal, LiV2O5.

    • Ana I. F. Tresguerres-Mata
    • Christian Lanza
    • Pablo Alonso-González
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • The directional propagation of phonon polaritons has been demonstrated in various twisted van der Waals materials. Here, the authors report a complementary type of directional polariton propagation by visualizing unidirectional ray polaritons in twisted asymmetric stacks of α-MoO3 and/or β-Ga2O3.

    • J. Álvarez-Cuervo
    • M. Obst
    • A. Paarmann
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • The direction of polariton canalization—its diffractionless propagation—in twisted bilayers at the magic angle is hindered by the lack of multiple magic angles. By controlling the twist angles between three α-MoO3 layers, reconfigurable and spectrally robust polariton canalization along any in-plane direction is demonstrated.

    • J. Duan
    • G. Álvarez-Pérez
    • P. Alonso-González
    Research
    Nature Materials
    Volume: 22, P: 867-872

  • Refraction between anisotropic media is still an unexplored phenomenon. Here, the authors investigate the propagation of hyperbolic phonon polaritons traversing α-MoO3 nanoprisms, showing a bending-free refraction effect and sub-diffractional focusing with foci size as small as 1/50 of the light wavelength in free space.

    • J. Duan
    • G. Álvarez-Pérez
    • P. Alonso-González
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8