Engineered Quantum Dot Single Photon Sources

TL;DR

This paper reviews recent advances in quantum dot single photon sources, highlighting their improved efficiency, speed, and practicality for quantum information applications.

Contribution

It provides a comprehensive overview of technological progress in quantum dot single photon sources and their potential for practical quantum information processing.

Findings

Demonstrated high temperature single photon emission

Achieved telecommunications wavelength operation

Enhanced integration with optical microcavities

Abstract

Fast, high efficiency, and low error single photon sources are required for implementation of a number of quantum information processing applications. The fastest triggered single photon sources to date have been demonstrated using epitaxially grown semiconductor quantum dots (QDs), which can be conveniently integrated with optical microcavities. Recent advances in QD technology, including demonstrations of high temperature and telecommunications wavelength single photon emission, have made QD single photon sources more practical. Here we discuss the applications of single photon sources and their various requirements, before reviewing the progress made on a quantum dot platform in meeting these requirements.