Semiconductor nanostructures engineering: Pyramidal quantum dots

TL;DR

This paper reviews the advances in pyramidal quantum dots, highlighting their uniformity, spectral purity, and potential for quantum information applications, especially in photon generation and the need for electrical control strategies.

Contribution

It provides a comprehensive overview of recent developments in pyramidal quantum dots, emphasizing their advantages and challenges for quantum technologies.

Findings

High uniformity and spectral purity of pyramidal QDs

Potential for generating entangled and indistinguishable photons

Identifies the need for electrical control strategies

Abstract

Pyramidal quantum dots (QDs) grown in inverted recesses have demonstrated over the years an extraordinary uniformity, high spectral purity and strong design versatility. We discuss recent results, also in view of the Stranski-Krastanow competition and give evidence for strong perspectives in quantum information applications for this system. We examine the possibility of generating entangled and indistinguishable photons, together with the need for the implementation of a, regrettably still missing, strategy for electrical control.