# Electrically driven and electrically tunable quantum light sources

## TL;DR

This paper demonstrates a compact, electrically tunable quantum light source on a chip using two quantum dot LEDs, enabling wavelength and fine structure splitting control for integrated quantum photonics.

## Contribution

It introduces a novel all-electric, on-chip quantum light source with tunable emission properties using closely integrated quantum dot LEDs.

## Key findings

- Wavelength of quantum dot emission can be electrically tuned via the Stark effect.
- Fine structure splitting can be electrically adjusted.
- Two quantum dot LEDs can function as a tunable quantum light source.

## Abstract

Compact and electrically controllable on-chip sources of indistinguishable photons are desirable for the development of integrated quantum technologies. We demonstrate that two quantum dot light emitting diodes (LEDs) in close proximity on a single chip can function as a tunable, all-electric quantum light source. Light emitted by an electrically excited driving LED is used to excite quantum dots the neighbouring diode. The wavelength of the quantum dot emission from the neighbouring driven diode is tuned via the quantum confined Stark effect. We also show that we can electrically tune the fine structure splitting.