Limits of dispersion engineering
❖Maximum dispersion in dielectric meta-
atom
❖Bandwidth, size and function are connected
*F. Presutti and F. Monticone, "Focusing on Bandwidth:
Achromatic Metalens Limits," Optica 7, (2020).)
Application parameters
⮚Bandwidth
⮚Diameter
⮚Spatial frequency, NA
Literature devices within bounds of theoretical formula*
Design parameters: ∆Φ
⮚Materials: index contrast
⮚Structure: Height + aspect ratio
⮚Complexity: multi-layers