Figure 2
From: Achromatic flat optical components via compensation between structure and material dispersions

Achromatic plasmonic deflector.
(a) Schematic configuration of flat achromatic beam deflector. (b–d) Ex distribution of the deflector at the wavelength λ = 1000 nm, 1500 nm and 2000 nm, respectively. (e) Simulated far field intensity as a function of the deflection angle θ with normal illumination. Inset: Simulated deflection angle θ as a function of wavelength. (e–f) Simulated phase shift (f) and (g) at 200nm above the output surface at the wavelength λ = 1000 nm (blue), 1500nm (green) and 2000nm (red).