Observation of naturally canalized phonon polaritons in LiV 2 O 5 thin layers.

Autor: F Tresguerres-Mata AI; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain., Lanza C; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain., Taboada-Gutiérrez J; Department of Quantum Matter Physics, Université de Genève, 24 Quai Ernest Ansermet, CH-1211, Geneva, Switzerland., Matson JR; Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, 37212, TN, USA., Álvarez-Pérez G; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain.; Center for Biomolecular Nanotechnologies, Istituto Italiano di Tecnologia, via Barsanti 14, Arnesano, 73010, Italy., Isobe M; Max-Planck Institute for Solid State Research, Stuttgart, D-70569, Germany., Tarazaga Martín-Luengo A; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain., Duan J; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain.; Center for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing, China.; Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic System, Beijing, Beijing Institute of Technology, Beijing, China., Partel S; Vorarlberg University of Applied Sciences, Research Center of Microtechnology, Dornbirn, Austria., Vélez M; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain., Martín-Sánchez J; Department of Physics, University of Oviedo, Oviedo, 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain., Nikitin AY; Donostia International Physics Center (DIPC), Donostia/San Sebastián, 20018, Spain.; IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain., Caldwell JD; Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, 37212, TN, USA.; Department of Mechanical Engineering, Vanderbilt University, Nashville, 37235, TN, USA., Alonso-González P; Department of Physics, University of Oviedo, Oviedo, 33006, Spain. pabloalonso@uniovi.es.; Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain. pabloalonso@uniovi.es.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Mar 27; Vol. 15 (1), pp. 2696. Date of Electronic Publication: 2024 Mar 27.
DOI: 10.1038/s41467-024-46935-z
Abstrakt: Polariton canalization is characterized by intrinsic collimation of energy flow along a single crystalline axis. This optical phenomenon has been experimentally demonstrated at the nanoscale by stacking and twisting van der Waals (vdW) layers of α-MoO 3 , by combining α-MoO 3 and graphene, or by fabricating an h-BN metasurface. However, these material platforms have significant drawbacks, such as complex fabrication and high optical losses in the case of metasurfaces. Ideally, it would be possible to canalize polaritons "naturally" in a single pristine layer. Here, we theoretically predict and experimentally demonstrate naturally canalized phonon polaritons (PhPs) in a single thin layer of the vdW crystal LiV 2 O 5 . In addition to canalization, PhPs in LiV 2 O 5 exhibit strong field confinement ( λ p ~ λ 0 27 ), slow group velocity (0.0015c), and ultra-low losses (lifetimes of 2 ps). Our findings are promising for the implementation of low-loss optical nanodevices where strongly directional light propagation is needed, such as waveguides or optical routers.
(© 2024. The Author(s).)
Databáze: MEDLINE
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