Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities
Resumen: 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
Idioma: Inglés
DOI: 10.1038/s41566-020-00731-5
Año: 2020
Publicado en: Nature Photonics (2020), [7 pp.]
ISSN: 1749-4885

Factor impacto JCR: 38.771 (2020)
Categ. JCR: PHYSICS, APPLIED rank: 2 / 160 = 0.013 (2020) - Q1 - T1
Categ. JCR: OPTICS rank: 1 / 99 = 0.01 (2020) - Q1 - T1

Factor impacto SCIMAGO: 13.673 - Electronic, Optical and Magnetic Materials (Q1) - Atomic and Molecular Physics, and Optics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-2-R
Tipo y forma: Article (PostPrint)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)

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