Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities

Yoo, Daehan ; León Pérez, Fernando de ; Pelton, Matthew ; Lee, In-Ho ; Mohr, Daniel A. ; Raschke, Markus B. ; Caldwell, Joshua D. ; Martín-Moreno, Luis ; Oh, Sang-Hyun

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: 2021

Publicado en: Nature Photonics 15 (2021), 125–130
ISSN: 1749-4885

Factor impacto JCR: 39.728 (2021)

Categ. JCR: PHYSICS, APPLIED rank: 2 / 161 = 0.012 (2021) - Q1 - T1
Categ. JCR: OPTICS rank: 1 / 101 = 0.01 (2021) - Q1 - T1

Factor impacto CITESCORE: 56.3 - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 10.991 - 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.)