# Terahertz emitters based on microcavity dipolaritons

## TL;DR

This paper introduces a novel method for generating terahertz radiation using dipolaritons in microcavities, optimizing system parameters to maximize emission, and analyzing the effects of electronic coupling on the process.

## Contribution

It presents a new approach utilizing dipolaritons in microcavities for efficient terahertz emission, including optimization strategies and analysis of electronic coupling effects.

## Key findings

- Maximized THz emission with laser frequencies matching different dipolariton states.
- Optimal structural parameters identified for AlGaAs double quantum wells.
- Electronic tunnel coupling influences THz frequency and intensity.

## Abstract

We propose the use of dipolaritons -- quantum well excitons with large dipole moment, coupled to a planar microcavity -- for generating terahertz (THz) radiation. This is achieved by exciting the system with two THz detuned lasers that leads to dipole moment oscillations of the exciton polariton at the detuning frequency, thus generating a THz emission. We have optimized the structural parameters of a system with microcavity embedded AlGaAs double quantum wells and shown that the THz emission intensity is maximized if the laser frequencies both match different dipolariton states. The influence of the electronic tunnel coupling between the wells on the frequency and intensity of the THz radiation is also investigated, demonstrating a trade-off between the polariton dipole moment and the Rabi splitting.