Platform of spectral analysis based on a tunable coupling between metasurface and molecular vibration

Coupling of metasurface resonance with a molecular vibration from weak - to - strong is demonstrated using different polymer based materials and metal-insulator-metal (MIM) metasurfaces. It is shown that the strength of coupling between MIM metasurface and molecular absorbance in the I-layer of organic nano-film depends on the dipole mode of the molecular vibration and the molecular number density. In the case of strong coupling, when Rabi splitting is observed at the molecular absorption band, the coupling efficiency reaches several percent of the particular molecular vibration modes in the volume below nano-disks of MIM metasurface.