Hybrid integration methods for on-chip quantum photonics

TL;DR

This paper reviews recent advances in hybrid integrated quantum photonics, combining solid-state quantum emitters with photonic circuits to enhance on-chip quantum light manipulation, addressing challenges and future prospects.

Contribution

It provides a comprehensive overview of hybrid integration techniques and discusses the current challenges and future directions in on-chip quantum photonics.

Findings

Hybrid integration improves efficiency and phase stability.

Various techniques for interfacing different materials are reviewed.

Remaining challenges include material interfacing and scalability.

Abstract

The goal of integrated quantum photonics is to combine components for the generation, manipulation, and detection of non-classical light in a phase stable and efficient platform. Solid-state quantum emitters have recently reached outstanding performance as single photon sources. In parallel, photonic integrated circuits have been advanced to the point that thousands of components can be controlled on a chip with high efficiency and phase stability. Consequently, researchers are now beginning to combine these leading quantum emitters and photonic integrated circuit platforms to realize the best properties of each technology. In this article, we review recent advances in integrated quantum photonics based on such hybrid systems. Although hybrid integration solves many limitations of individual platforms, it also introduces new challenges that arise from interfacing different materials. We review various issues in solid-state quantum emitters and photonic integrated circuits, the hybrid integration techniques that bridge these two systems, and methods for chip-based manipulation of photons and emitters. Finally, we discuss the remaining challenges and future prospects of on-chip quantum photonics with integrated quantum emitters.