Magnetic control of dipolaritons in quantum dots

TL;DR

This paper explores the theoretical existence of dipolaritons in coupled quantum dots within a microcavity, demonstrating how magnetic fields can control their properties and enable dark polariton states.

Contribution

It introduces the concept of dipolaritons in quantum dots and analyzes how magnetic fields influence their behavior and emission properties.

Findings

Magnetic fields can tune exciton and dipolariton properties.

Quantum dot dipolaritons can form true dark states.

Magnetic control affects the emission characteristics.

Abstract

Dipolaritons are quasiparticles that arise in coupled quantum wells embedded in a microcavity, they are a superposition of a photon, a direct exciton and an indirect exciton. We propose the existence of dipolaritons in a system of two coupled quantum dots inside a microcavity in direct analogy with the quantum well case and find that, despite some similarities, dipolaritons in quantum dots have different properties and can lead to true dark polariton states. We use a finite system theory to study the effects of the magnetic field on the system, including the emission, and find that it can be used as a control parameter of the properties of excitons and dipolaritons, and the overall magnetic behaviour of the structure.