Hybrid Metasurfaces for Simultaneous Focusing and Filtering

TL;DR

This paper introduces a novel polymeric metasurface design that combines light focusing and filtering capabilities, fabricated via a laser writing process, with potential applications in imaging technologies.

Contribution

It presents a new hybrid metasurface design that integrates focusing and filtering functions, fabricated through a simple, scalable laser writing process.

Findings

Successful design of filters for visible and near-infrared wavelengths

Fabrication method resembles 3D printing using two-photon lithography

Potential for mass production via mold creation

Abstract

This work presents the design and fabrication of simple, polymeric, structure-based optical filters that simultaneously focus light. These filters represent a novel design at the boundary between diffractive optics and metasurfaces that may provide significant advantages for both digital and hyperspectral imaging. The fabrication process for the proposed filters resembles 3D printing, and is based on direct laser writing of a polymeric material using two-photon lithography. In addition, printed structures could be used to create molds for nanoimprint replication and mass production. Filters for visible and near-infrared wavelengths were designed using finite difference time domain (FDTD) simulations.