Robust Achromatic All-Dielectric Metalens for Infrared Detection in Intelligent Inspection.

ABSTRACT: Metalens has the advantages of high design freedom, light weight and easy integration, thus provides a powerful platform for infrared detection. Here, we numerically demonstrated a broadband achromatic infrared all-dielectric metalens over a continuous 800 nm bandwidth, with strong environmental adaptability in air, water and oil. By building a database with multiple 2π phase coverage and anomalous dispersions, optimizing the corrected required phase profiles and designing the sizes and spatial distributions of silicon nanopillars, we numerically realized the design of broadband achromatic metalens. The simulation results of the designed metalens show nearly constant focal lengths and diffraction-limited focal spots over the continuous range of wavelengths from 4.0 to 4.8 μm, indicating th

SUBMITTER: Si W 

PROVIDER: S-EPMC9460807 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature