Free-form inverse design approach for realizing large-area 3D chiral metalens

Abstract

Convergent Born Series (CBS) stands at the forefront of this study, showcasing its pivotal role in the realm of inverse design methodologies for complex photonic structures. CBS serves as the cornerstone of an iterative framework, enabling precise tailoring of optical characteristics and electromagnetic responses within photonic devices. Integrating CBS into an optimization framework facilitates the creation of customized structures with targeted functionalities. The research highlights the implementation of CBS, emphasizing its computational efficiency and accuracy in modeling complex scattering phenomena compared to conventional methods like Finite-Difference Time-Domain (FDTD). CBS formulations demonstrate improved convergence rates and computational efficacy, enabling rapid iteration and refinement of complex photonic structures such as chiral metalens structures. Additionally, the study underscores CBS's potential implications in enabling the fabrication of precise nanostructures via photolithography, promising tailored photonic devices with unprecedented optical functionalities. As a key computational tool, CBS offers computational efficiency in modeling advanced photonic structures, presenting immense promise for the advancement of optical engineering and nanotechnology.