000145552 001__ 145552 000145552 005__ 20250923084437.0 000145552 0247_ $$2doi$$a10.1038/s41467-024-52750-3 000145552 0248_ $$2sideral$$a140385 000145552 037__ $$aART-2024-140385 000145552 041__ $$aeng 000145552 100__ $$aÁlvarez-Cuervo, J. 000145552 245__ $$aUnidirectional ray polaritons in twisted asymmetric stacks 000145552 260__ $$c2024 000145552 5060_ $$aAccess copy available to the general public$$fUnrestricted 000145552 5203_ $$aThe vast repository of van der Waals (vdW) materials supporting polaritons offers numerous possibilities to tailor electromagnetic waves at the nanoscale. The development of twistoptics—the modulation of the optical properties by twisting stacks of vdW materials—enables directional propagation of phonon polaritons (PhPs) along a single spatial direction, known as canalization. Here we demonstrate a complementary type of directional propagation of polaritons by reporting the visualization of unidirectional ray polaritons (URPs). They arise naturally in twisted hyperbolic stacks with very different thicknesses of their constituents, demonstrated for homostructures of -MoO3 and heterostructures of -MoO3 and -Ga2O3. Importantly, their ray-like propagation, characterized by large momenta and constant phase, is tunable by both the twist angle and the illumination frequency. Apart from their fundamental importance, our findings introduce twisted asymmetric stacks as efficient platforms for nanoscale directional polariton propagation, opening the door for applications in nanoimaging, (bio)-sensing, or polaritonic thermal management. 000145552 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E13-23R 000145552 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000145552 590__ $$a15.7$$b2024 000145552 592__ $$a4.761$$b2024 000145552 591__ $$aMULTIDISCIPLINARY SCIENCES$$b10 / 135 = 0.074$$c2024$$dQ1$$eT1 000145552 593__ $$aBiochemistry, Genetics and Molecular Biology (miscellaneous)$$c2024$$dQ1 000145552 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ1 000145552 593__ $$aChemistry (miscellaneous)$$c2024$$dQ1 000145552 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000145552 700__ $$aObst, M. 000145552 700__ $$aDixit, S. 000145552 700__ $$aCarini, G. 000145552 700__ $$aF. Tresguerres-Mata, A. I. 000145552 700__ $$aLanza, C. 000145552 700__ $$aTerán-García, E. 000145552 700__ $$aÁlvarez-Pérez, G. 000145552 700__ $$aÁlvarez-Tomillo, L. F. 000145552 700__ $$aDiaz-Granados, K. 000145552 700__ $$aKowalski, R. 000145552 700__ $$aSenerath, A. S. 000145552 700__ $$aMueller, N. S. 000145552 700__ $$0(orcid)0000-0002-3576-5156$$aHerrer, L. 000145552 700__ $$0(orcid)0000-0001-9566-0738$$aDe Teresa, J. M. 000145552 700__ $$aWasserroth, S. 000145552 700__ $$aKlopf, J. M. 000145552 700__ $$aBeechem, T. 000145552 700__ $$aWolf, M. 000145552 700__ $$aEng, L. M. 000145552 700__ $$aFolland, T. G. 000145552 700__ $$aTarazaga Martín-Luengo, A. 000145552 700__ $$aMartín-Sánchez, J. 000145552 700__ $$aKehr, S. C. 000145552 700__ $$aNikitin, A. Y. 000145552 700__ $$aCaldwell, J. D. 000145552 700__ $$aAlonso-González, P. 000145552 700__ $$aPaarmann, A. 000145552 773__ $$g15 (2024), 9042 [10 pp.]$$tNature communications$$x2041-1723 000145552 8564_ $$s3202287$$uhttps://zaguan.unizar.es/record/145552/files/texto_completo.pdf$$yVersión publicada 000145552 8564_ $$s2399217$$uhttps://zaguan.unizar.es/record/145552/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000145552 909CO $$ooai:zaguan.unizar.es:145552$$particulos$$pdriver 000145552 951__ $$a2025-09-22-14:47:29 000145552 980__ $$aARTICLE