Fig. 1: Artistic rendering of qBIC-supporting, free-standing Si-membrane metasurfaces enabling vibrational strong coupling; objects in the image do not represent their realistic dimensions.
From: Trapping light in air with membrane metasurfaces for vibrational strong coupling
The Brillouin zone folding (BZF) method is used to excite qBIC modes and efficiently trap light into air voids. Upon coupling the qBIC air mode to the C = O vibrational mode of PMMA molecules, vibrational polaritons are generated, revealing a coherent energy exchange between the cavity and the molecule. Schematics depict the all-Si metasurface with mid-IR light trapping capabilities and the plot on the right shows the simulation of vibrational strong coupling between the molecular vibrational states and the qBIC cavity resonance mode.
