Fig. 1
From: Ultrathin and multicolour optical cavities with embedded metasurfaces
Design and concept of metasurface-based nanocavity. a Schematic of the metasurface-based nanocavity. b, c Comparison in phase and resonance conditions between: b conventional Fabry–Pérot resonator that utilizes two parallel mirrors and c resonator with a reflecting metasurface placed in between the two mirrors
