title: Strong Light-Matter Coupling and Hybridization of Molecular Vibrations in a Low-Loss Infrared Microcavity.
abstract: Hybridized polaritons are generated by simultaneously coupling two vibrational modes of two different organic materials to the resonance of a low-loss infrared optical microcavity. A thin film of poly methyl methacrylate with solvent molecules of dimethylformamide trapped inside provided two spectrally narrow, closely spaced carbonyl stretches with absorption peaks at 1731 and 1678 cm(-1). Situating this film in a microcavity based on Ge/ZnS distributed Bragg reflector mirrors produced three distinct polariton branches in the dispersion relation due to hybridization of the vibrational resonances. Two anticrossings were observed with Rabi splittings of 9.6 and 5.2 meV, between the upper-to-middle and middle-to-lower polariton branches, respectively. This system marks the first demonstration of polariton hybridization between a solid and solvent molecules and can open new paths toward chemical reaction modification and energy transfer studies in the mid-infrared spectral range.
authors.affiliation: The Department of Chemistry and the Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat Gan 52900, Israel.
authors.forename: Merav
authors.initials: M
authors.lastname: Muallem
authors.affiliation: The Department of Chemistry and the Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat Gan 52900, Israel.
authors.forename: Alexander
authors.initials: A
authors.lastname: Palatnik
authors.affiliation: The Department of Chemistry and the Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat Gan 52900, Israel.
authors.forename: Gilbert D
authors.initials: GD
authors.lastname: Nessim
authors.affiliation: The Department of Chemistry and the Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat Gan 52900, Israel.
authors.forename: Yaakov R
authors.initials: YR
authors.lastname: Tischler
mesh_terms: D004126:Dimethylformamide / Q000737:chemistry; D008027:Light; D020366:Methylmethacrylate / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D014732:Vibration
chemical_list: D012997:Solvents; D020366:Methylmethacrylate; D004126:Dimethylformamide