Design of a 4-electrode optical device for application of vector electric fields to self-assembled quantum dot complexes

TL;DR

This paper introduces a 4-electrode optical device capable of applying arbitrarily oriented electric fields to quantum dot complexes, enabling precise control of their charge and coupling properties for optoelectronic applications.

Contribution

The paper presents a novel 4-electrode device design that allows arbitrary electric field application to quantum dots, enhancing control over their quantum properties.

Findings

Device design enables arbitrary electric field orientation.

Numerical simulations confirm electric field tunability.

Potential for improved quantum dot device control.

Abstract

Self-assembled InAs quantum dots (QDs) are of great interest as components of optoelectronic devices that can operate at the quantum limit. The charge configuration, interdot coupling, and symmetry of complexes containing multiple QDs can all be tuned with applied electric fields, but the magnitude and angle of the electric field required to control each of these parameters depends on the orientation of the QD complex. We present a 4-electrode device compatible with optical excitation and emission that allows application of electric fields with arbitrary magnitudes and angles relative to isolated QD complexes. We demonstrate the electric field tunability of this device with numerical simulations.