Integrated diamond networks for quantum nanophotonics

TL;DR

This paper presents an integrated diamond nanophotonic platform enabling the creation of quantum networks with ring resonators and waveguides, facilitating efficient single-photon generation and routing at room temperature.

Contribution

The development of a diamond on insulator platform with integrated ring resonators and waveguides for quantum nanophotonics is a novel advancement.

Findings

Demonstrated diamond ring resonators operating in visible and near-infrared wavelengths.

Achieved on-chip quantum nanophotonic network with efficient single-photon routing.

Operated devices at room temperature.

Abstract

Diamond is a unique material with exceptional physical and chemical properties that offers potential for the realization of high-performance devices with novel functionalities. For example diamond's high refractive index, transparency over wide wavelength range, and large Raman gain are of interest for the implementation of novel photonic devices. Recently, atom-like impurities in diamond emerged as an exceptional system for quantum information processing, quantum sensing and quantum networks. For these and other applications, it is essential to develop an integrated nanophotonic platform based on diamond. Here, we report on the realization of such an integrated diamond photonic platform, diamond on insulator (DOI), consisting of a thin single crystal diamond film on top of an insulating silicon dioxide/silicon substrate. Using this approach, we demonstrate diamond ring resonators that operate in a wide wavelength range, including the visible (630nm) and near-infrared (1,550nm). Finally, we demonstrate an integrated, on-chip quantum nanophotonic network, consisting of ring resonators coupled to low loss waveguides with grating couplers, that enables the generation and efficient routing of single photons at room temperature.