Single quantum dot nanowire LEDs

TL;DR

This paper reports the fabrication and characterization of InP-InAsP nanowire LEDs with quantum-dot-sized active regions, demonstrating their potential for electrically-driven quantum optics and single-photon applications.

Contribution

The work introduces a reproducible method to create nanowire LEDs with integrated quantum dots, enabling efficient electron-hole recombination and promising quantum optics functionalities.

Findings

Operated at room temperature and 10 K, showing stable electroluminescence.

Self-aligned quantum dot structure enhances device integration.

Potential for single-photon emission demonstrated.

Abstract

We report reproducible fabrication of InP-InAsP nanowire light emitting diodes in which electron-hole recombination is restricted to a quantum-dot-sized InAsP section. The nanowire geometry naturally self-aligns the quantum dot with the n-InP and p-InP ends of the wire, making these devices promising candidates for electrically-driven quantum optics experiments. We have investigated the operation of these nano-LEDs with a consistent series of experiments at room temperature and at 10 K, demonstrating the potential of this system for single photon applications.