GaAs integrated quantum photonics: Towards dense and fully-functional quantum photonic integrated circuits

TL;DR

This paper reviews recent advances in GaAs-based integrated quantum photonics, highlighting progress towards dense, fully-functional quantum photonic circuits with diverse capabilities for quantum information processing.

Contribution

It provides a comprehensive overview of the development of key GaAs quantum photonic components and discusses prospects for their full integration into complex circuits.

Findings

Progress in GaAs single-photon sources

Advances in low-loss routing and modulation

Potential for fully integrated quantum photonic circuits

Abstract

The recent progress in integrated quantum optics has set the stage for the development of an integrated platform for quantum information processing with photons, with potential applications in quantum simulation. Among the different material platforms being investigated, direct-bandgap semiconductors and particularly gallium arsenide (GaAs) offer the widest range of functionalities, including single- and entangled-photon generation by radiative recombination, low-loss routing, electro-optic modulation and single-photon detection. This paper reviews the recent progress in the development of the key building blocks for GaAs quantum photonics and the perspectives for their full integration in a fully-functional and densely integrated quantum photonic circuit.