Fig. 4: Experimental results of arbitrary dispersion control metalens.
From: Asymptotic dispersion engineering for ultra-broadband meta-optics
a–c The matching results of the enhanced negative dispersion, positive dispersion, and arbitrary dispersion manipulation metalenses designed by the asymptotic phase compensation method, respectively, where the solid lines are the constructed wavefront phase profiles at each wavelength, and the scatters are the phase of the matching structural phases. d–f Experimental light intensity profiles for the enhanced negative dispersion metalens, positive dispersion metalens and arbitrary dispersion metalens respectively at various incident wavelengths. The unit is nm. g–i The blue line is the focal length statistics at all wavelengths, and the crimson line is the normal negative dispersion reference curve. j Simulated light intensity distribution of wavelength routing at the focal plane for six wavelengths across 400~1000 nm bandwidth.
