Scarafagio, Marion
Tallaire, Alexandre
Tielrooij, Klaas-Jan
Cano, Daniel
Grishin, André
Chavanne, Marie-Hélène
Koppens, Frank H. L.
Ringuedé, Armelle
Cassir, Michel
Serrano, Diana
Goldner, Philippe
Ferrier, Alban
2019-05-03
<p>Atomic layer deposited (ALD) Y2O3 thin films have been thoroughly<br>
investigated for optical or electronic applications. The coherent spectroscopy of<br>
lanthanide ions doped into this material has also recently attracted increasing interest<br>
in the field of quantum technologies for which they are considered promising candidates<br>
in quantum memories or as spin−photon interfaces. However, these most demanding<br>
applications require a deep control over the local positioning of the ions and their close<br>
environment in the crystalline matrix. This study focuses on the structural as well as<br>
optical properties of Eu3+ and Er3+ dopants in Y2O3 using photoluminescence (PL),<br>
luminescence decay times, and inhomogeneous line width (Γinh) measurements within<br>
this particular context. While as-grown ALD films do not provide an ideal host for the<br>
emitters, we demonstrate that by optimizing the deposition conditions and using<br>
appropriate annealing post treatments narrow inhomogeneous lines can be obtained for<br>
the 7F0 ↔ 5D0 transition of Eu3+ even for nanoscale films. Furthermore, about 1.5 ms<br>
lifetime has been measured for the infrared telecom transition of Er in ultrathin films (<10 nm), which is an order of magnitude higher than in nanoparticles of the same size. These results validate optimized rare-earth-doped ALD Y2O3 films as a suitable platform for photonics applications where few-nanometer-thick films with well-localized emitters are mandatory. This approach provides the first building blocks toward the development of more complex devices for quantum sensing or hybrid structures coupled with other systems such as two-dimensional materials.</p>
https://doi.org/10.1021/acs.jpcc.9b02597
oai:zenodo.org:3250542
Zenodo
https://zenodo.org/communities/nanoqtech-h2020
https://zenodo.org/communities/eu
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
rare earth
nanoqtech
quantum technologies
thin film
Ultrathin Eu- and Er-Doped Y2O3 Films with Optimized Optical Properties for Quantum Technologies
info:eu-repo/semantics/article