Reconfigurable all-dielectric metalens with diffraction-limited performance.

ABSTRACT: Active metasurfaces, whose optical properties can be modulated post-fabrication, have emerged as an intensively explored field in recent years. The efforts to date, however, still face major performance limitations in tuning range, optical quality, and efficiency, especially for non-mechanical actuation mechanisms. In this paper, we introduce an active metasurface platform combining phase tuning in the full 2π range and diffraction-limited performance using an all-dielectric, low-loss architecture based on optical phase change materials (O-PCMs). We present a generic design principle enabling binary switching of metasurfaces between arbitrary phase profiles and propose a new figure-of-merit (FOM) tailored for reconfigurable meta-optics. We implement the approach to realize a high-performan

SUBMITTER: Shalaginov MY 

PROVIDER: S-EPMC7900249 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature