Full Stokes imaging polarimetry using dielectric metasurfaces

TL;DR

This paper introduces a novel dielectric metasurface-based division of focal plane polarimeter capable of full-Stokes polarization imaging, surpassing traditional efficiency limits of polarization filter-based devices.

Contribution

The work presents a new design for DoFP-PCs using dielectric metasurfaces that enable full-Stokes polarization imaging without relying on polarization filters.

Findings

Achieves full-Stokes polarization imaging with high efficiency.

Overcomes the 50% efficiency limit of traditional polarization filter-based devices.

Demonstrates a compact and versatile polarization imaging system.

Abstract

Polarization is a degree of freedom of light carrying important information that is usually absent in intensity and spectral content. Imaging polarimetry is the process of determining the polarization state of light, either partially or fully, over an extended scene. It has found several applications in various fields, from remote sensing to biology. Among different devices for imaging polarimetry, division of focal plane polarization cameras (DoFP-PCs) are more compact, less complicated, and less expensive. In general, DoFP-PCs are based on an array of polarization filters in the focal plane. Here we demonstrate a new principle and design for DoFP-PCs based on dielectric metasurfaces with the ability to control polarization and phase. Instead of polarization filtering, the method is based on splitting and focusing light in three different polarization bases. Therefore, it enables full-Stokes characterization of the state of polarization, and overcomes the 50% theoretical efficiency limit of the polarization-filter-based DoFP-PCs.