Planned intervention: On Wednesday April 3rd 05:30 UTC Zenodo will be unavailable for up to 2-10 minutes to perform a storage cluster upgrade.
Published October 18, 2021 | Version v1
Journal article Open

Controlling the interfacial reactions and environment of rare-earth ions in thin oxide films towards wafer-scalable quantum technologies

  • 1. Chimie Paris Tech, PSL University, CNRS, Institut de Recherche de Chimie Pairs, Paris, France
  • 2. CIMAP, CEA, UMR CNRS 6252, ENSICAEN, Normandie Université, Caen Cedex 04 14050, France

Description

Rare earth (RE) doped oxides have demonstrated great potential for photonic applications and have also appeared as promising candidates for quantum memory devices and microwave to optical transducers. Here, we investigate the potential of Chemical Vapor Deposited (CVD) europium-doped Y2O3 thin films on silicon as a new platform for integrated quantum devices. We aim at improving the optical properties of such thin films by carefully controlling the RE ion's environment. In particular, we study the effect of annealing post treatments and demonstrate that a significant source of broadening of the optical transition arises from interfacial reactions with the silicon substrate. We thus propose to encapsulate RE ions between undoped high-quality thick layers in order to limit the impact of interfacial reactions on their properties during thermal annealing. Using this approach, we succeeded in measuring a narrow inhomogeneous linewidth of 18 GHz and an ultra-narrow homogeneous linewidth of 5 MHz inferred from spectral hole width. These results are promising towards the use of these engineered RE doped thin films for the development of a scalable nanostructured spin-photon interface. In addition, our strategy could be applied to a large variety of oxide films for a broad range of applications. Paper published in Materials Advances.

Files

Harada et al. - 2021 - Controlling the interfacial reactions and environm.pdf

Additional details

Funding

SQUARE – Scalable Rare Earth Ion Quantum Computing Nodes 820391
European Commission