Concept of non-periodic metasurfaces based on positional gradients applied to IR-flat lenses
Idioma
en
Article de revue
Este ítem está publicado en
Optical Materials Express. 2017, vol. 7, n° 7, p. 2346-2351
OSA pub
Resumen en inglés
We describe a theoretical study of gradient metasurfaces that – unlike most theoretical designs requiring advanced fabrication techniques – could easily be produced by a simple patterning method, templated microlens ...Leer más >
We describe a theoretical study of gradient metasurfaces that – unlike most theoretical designs requiring advanced fabrication techniques – could easily be produced by a simple patterning method, templated microlens lithography (TEMPL). We show here that positional gradients of identical microstructures can lead to a gradient of phase lag across the metasurface. Using a radial gradient in the pitch of a hexagonal array of identical microfabricated resonators, one could thus produce gradient metasurfaces with the ability to focus infrared light. We provide illustrative examples of devices and compare their theoretical capabilities.< Leer menos
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