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. 2018 Jul 10;9:2673. doi: 10.1038/s41467-018-05034-6

Fig. 1.

Fig. 1

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