Fig. 2: Ultra-broadband CAFAB metasurface design and its performance. | Nature Communications

Fig. 2: Ultra-broadband CAFAB metasurface design and its performance.

From: A metasurface-based full-color circular auto-focusing Airy beam transmitter for stable high-speed underwater wireless optical communications

Fig. 2

a Phase distribution of superposition of cubic phase and lens phase. b Left: schematic diagram of the meta, right: top view and side view of the meta. c The polarization conversion efficiency (PCE) of the metasurface when the incident wavelength is 440 nm–640 nm. d Scanning electron microscopy (SEM) image of the details of a fabricated polarization-dependent metasurface.

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