Two-dimensional exciton-polariton - light guiding by transition metal dichalcogenide monolayers

TL;DR

This paper demonstrates that monolayer transition metal dichalcogenides can support two-dimensional exciton-polariton modes capable of guiding light with high confinement and long propagation distances, enhancing their potential in photonic applications.

Contribution

It introduces the concept of exciton-polariton light guiding in TMDC monolayers and characterizes their confinement and propagation properties.

Findings

Supports guided optical mode below exciton resonance

Confines light within approximately one micrometer from the monolayer

Achieves propagation lengths exceeding 100 micrometers

Abstract

A monolayer of transition metal dichalcogenide (TMDC) is shown to be capable of supporting a guided optical mode below the exciton resonance, a two-dimensional exciton polariton. This visible or near IR mode is confined roughly within a micrometer from the monolayer and has propagation length exceeding 100 micrometers. The light guiding ability makes TMDC monolayers more versatile and potentially attractive photonic platform.