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. 2017 Oct 20;6(10):e17071. doi: 10.1038/lsa.2017.71

Figure 5.

Figure 5

Broadband focal properties for the ESM and the HSM. (a–d) Measured xz plane (x∈[−10,10] μm, z∈[−20,20] μm) optical intensities of (a, b) the ESM and (c, d) the HSM with LCP and RCP incident light at wavelengths (z axis) of 600, 700, 800 and 900 nm. (e) Schematic of the defection of light incident on a metalens with a phase shift Φ(x,y). The light (red arrow) is normally incident, and the transmission light is defected at angles with ϕt and θt. (f, g) Focal length as a function of wavelength for (f) the ESM and (g) the HSM. The blue line, solid red circle and solid green square show the theoretical predictions, simulated results and experimental results. For each metalens, there are four focal points in total with LCP and RCP incident light. The error bar is defined by the deviation of the focal lengths of the four foci.