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This study proposes two types of metasurfaces to adjust the phase of wavefront based on geometric phases. Specifically, a meta-atom etched by two different elliptic cylinders possesses more adjusted parameters… Click to show full abstract
This study proposes two types of metasurfaces to adjust the phase of wavefront based on geometric phases. Specifically, a meta-atom etched by two different elliptic cylinders possesses more adjusted parameters and satisfies some demanding design conditions. Under the illumination of circularly polarized light, one of them, metalens, can focus the light with a focusing efficiency of 60 %. The other can generate vortex beams with an efficiency of ∼55%. Such metasurfaces can be used as planar optical components in biological, medical, and intelligent wearable fields.
Journal Title: Optical Materials Express
Year Published: 2021
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