# Manipulating polarized light with a planar slab of Black Phosphorus

## TL;DR

This paper explores how a single slab of Black Phosphorus, due to its in-plane anisotropy, can effectively manipulate electromagnetic wave polarization, enabling various polarization filtering and conversion functionalities for mid-IR photonic devices.

## Contribution

It introduces novel designs using Black Phosphorus slabs for polarization control, leveraging its anisotropic properties for efficient wave manipulation.

## Key findings

- Black Phosphorus slabs can filter specific polarization components
- They can rotate polarization axes effectively
- They can convert linear to circular polarization

## Abstract

Wave polarization contains valuable information for electromagnetic signal processing and the ability to manipulate it can be extremely useful in photonic devices. In this work, we propose designs comprised of one of the emerging and interesting two-dimensional media: Black Phosphorus. Due to substantial in-plane anisotropy, a single slab of Black Phosphorus can be very efficient for manipulating the polarization state of electromagnetic waves. We investigate Black Phosphorus slabs that filter the fields along one direction, or polarization axis rotation, or convert linear polarization to circular. These slabs can be employed as components in numerous mid-IR integrated devices.