106156 20230519145400.0 doi 10.1038/s41566-020-00731-5 sideral 121334 ART-2021-121334 eng Yoo, Daehan Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities 2021 Access copy available to the general public Unrestricted Vibrational ultrastrong coupling, where the light–matter coupling strength is comparable to the vibrational frequency of molecules, presents new opportunities to probe the interactions between molecules and zero-point fluctuations, harness cavity-modified chemical reactions and develop novel devices in the mid-infrared spectral range. Here we use epsilon-near-zero nanocavities filled with a model polar medium (SiO2) to demonstrate ultrastrong coupling between phonons and gap plasmons. We present classical and quantum-mechanical models to quantitatively describe the observed plasmon–phonon ultrastrong coupling phenomena and demonstrate a modal splitting of up to 50% of the resonant frequency (normalized coupling strength η > 0.25). Our wafer-scale nanocavity platform will enable a broad range of vibrational transitions to be harnessed for ultrastrong coupling applications info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-1-R info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-2-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 39.728 2021 PHYSICS, APPLIED 2 / 161 = 0.012 2021 Q1 T1 OPTICS 1 / 101 = 0.01 2021 Q1 T1 10.991 2021 Electronic, Optical and Magnetic Materials 2021 Q1 Atomic and Molecular Physics, and Optics 2021 Q1 56.3 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion León Pérez, Fernando de (orcid)0000-0003-0381-3448 Pelton, Matthew Lee, In-Ho Mohr, Daniel A. Raschke, Markus B. Caldwell, Joshua D. Martín-Moreno, Luis (orcid)0000-0001-9273-8165 Oh, Sang-Hyun 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 15 (2021), 125–130 Nature Photonics Nature Photonics 1749-4885 11686346 http://zaguan.unizar.es/record/106156/files/texto_completo.pdf Postprint 2925466 http://zaguan.unizar.es/record/106156/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:106156 articulos driver 2023-05-18-13:39:12 ARTICLE