Highly Efficient and achromatic mid-infrared silicon nitride meta-lenses.

ABSTRACT: Inverse design with topology optimization considers a promising methodology for discovering new optimized photonic structure that enables to break the limitations of the forward or the traditional design especially for the meta-structure. This work presents a high efficiency mid infra-red imaging photonics element along mid infra-red wavelengths band starts from 2 to 5 µm based on silicon nitride optimized material structures. The first two designs are broadband focusing and reflective meta-lens under very high numerical aperture condition (NA = 0.9). The two designs are modeled by inverse design with topology optimization problem with Kreisselmeier-Steinhauser (k-s) aggregation objective function, while the final design is depended on novel inverse design optimization problem with double

SUBMITTER: Maher A 

PROVIDER: S-EPMC11736020 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature