Nanophotonic approaches for integrated quantum photonics

TL;DR

This paper reviews recent advances in nanophotonic platforms for quantum photonics, focusing on integrated glass waveguides, optical fibers, and quantum nanoemitters like perovskite nanocrystals and silicon-vacancy centers, aiming to enhance scalability and efficiency.

Contribution

It introduces new nanophotonic platforms using ion-exchange glass waveguides and optical fibers, and discusses coupling strategies with novel quantum nanoemitters for scalable quantum photonics.

Findings

Development of integrated glass waveguides via ion-exchange technique

Implementation of elongated optical fibers for quantum photonics

Progress in coupling quantum nanoemitters with photonic platforms

Abstract

Photons for quantum technologies have been identified early on as a very good candidate for carrying quantum information encoded onto them, either by polarization encoding, time encoding or spatial encoding. Quantum cryptography, quantum communications, quantum networks in general and quantum computing are some of the applications targeted by what is now called quantum photonics. Nevertheless, it was pretty clear at an early stage that bulk optics for handling quantum states of light with photons would not be able to deliver what is needed for these technologies. More recently, single photons, entangled photons and quantum optics in general have been coupled to more integrated approaches coming from classical optics in order to meet the requirements of scalability, reliablility and efficiency for quantum technologies. In this article, we develop our recent advances in two different nanophotonic platforms for quantum photonics using elongated optical fibers and integrated glass waveguides made by the so-called ion-exchange technique. We also present our latest results on quantum nanoemitters that we plan to couple and incorporate with our photonics platforms. These nanoemitters are of two kinds: nanocrystals made of perovskites as well as silicon-vacancy defect centers in nanodiamonds. Some of their properties are developed in this work. We will then give the general steps necessary in order to couple these nanoemitters efficiently with our platforms in the near future.