Photonic Multitasking Interleaved Si Nanoantenna Phased Array

Keywords

geometric phase; Metasurfaces; multifunctional optics; phased array antenna; spatial multiplexing

Abstract

Metasurfaces provide unprecedented control over light propagation by imparting local, space-variant phase changes on an incident electromagnetic wave. They can improve the performance of conventional optical elements and facilitate the creation of optical components with new functionalities and form factors. Here, we build on knowledge from shared aperture phased array antennas and Si-based gradient metasurfaces to realize various multifunctional metasurfaces capable of achieving multiple distinct functions within a single surface region. As a key point, we demonstrate that interleaving multiple optical elements can be accomplished without reducing the aperture of each subelement. Multifunctional optical elements constructed from Si-based gradient metasurface are realized, including axial and lateral multifocus geometric phase metasurface lenses. We further demonstrate multiwavelength color imaging with a high spatial resolution. Finally, optical imaging functionality with simultaneous color separation has been obtained by using multifunctional metasurfaces, which opens up new opportunities for the field of advanced imaging and display.

Publication Date

12-14-2016

Publication Title

Nano Letters

Volume

16

Issue

12

Number of Pages

7671-7676

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/acs.nanolett.6b03505

Socpus ID

85006379828 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85006379828

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