The strong modulation limit of excitons and trions in moir\'e materials

TL;DR

This paper investigates how strong moiré patterns in semiconductor heterobilayers affect exciton and trion optical properties, comparing them to quantum dots and exploring their potential for novel light-emitting devices.

Contribution

It provides a theoretical analysis of exciton and trion behaviors under strong moiré modulation, highlighting differences from quantum dot systems and suggesting applications in optoelectronics.

Findings

Moiré patterns significantly alter exciton and trion states.

Comparison reveals both similarities and differences with quantum dot systems.

Potential for designing unique light emitters using moiré materials.

Abstract

The optical properties of weakly-doped two-dimensional materials are dominated by strong exciton and trion absorption and luminescence features. In this article we examine the influence of moir\'e patterns in semiconductor heterobilayers on exciton and trion states in the limit of strong moir\'e modulation potentials, commenting on similarities and differences compared to the case of excitons and trions in semiconductor quantum dots. We discuss strategies for using optical properties as quantitative probes of moir\'e materials, and the prospects for exploiting moir\'e materials to design unique light emitters.