Journal article Open Access

Ultrathin Eu- and Er-Doped Y2O3 Films with Optimized Optical Properties for Quantum Technologies

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


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{
  "DOI": "10.1021/acs.jpcc.9b02597", 
  "author": [
    {
      "family": "Scarafagio, Marion"
    }, 
    {
      "family": "Tallaire, Alexandre"
    }, 
    {
      "family": "Tielrooij, Klaas-Jan"
    }, 
    {
      "family": "Cano, Daniel"
    }, 
    {
      "family": "Grishin, Andr\u00e9"
    }, 
    {
      "family": "Chavanne, Marie-H\u00e9l\u00e8ne"
    }, 
    {
      "family": "Koppens, Frank H. L."
    }, 
    {
      "family": "Ringued\u00e9, Armelle"
    }, 
    {
      "family": "Cassir, Michel"
    }, 
    {
      "family": "Serrano, Diana"
    }, 
    {
      "family": "Goldner, Philippe"
    }, 
    {
      "family": "Ferrier, Alban"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2019, 
        5, 
        3
      ]
    ]
  }, 
  "abstract": "<p>Atomic layer deposited (ALD) Y2O3&nbsp;thin&nbsp;films have been thoroughly<br>\ninvestigated for optical or electronic applications. The coherent spectroscopy of<br>\nlanthanide ions doped into this material has also recently attracted increasing interest<br>\nin the&nbsp;field of quantum technologies for which they are considered promising candidates<br>\nin quantum memories or as spin&minus;photon interfaces. However, these most demanding<br>\napplications require a deep control over the local positioning of the ions and their close<br>\nenvironment in the crystalline matrix. This study focuses on the structural as well as<br>\noptical properties of Eu3+&nbsp;and Er3+&nbsp;dopants in Y2O3&nbsp;using photoluminescence (PL),<br>\nluminescence decay times, and inhomogeneous line width (&Gamma;inh) measurements within<br>\nthis particular context. While as-grown ALD&nbsp;films do not provide an ideal host for the<br>\nemitters, we demonstrate that by optimizing the deposition conditions and using<br>\nappropriate annealing post treatments narrow inhomogeneous lines can be obtained for<br>\nthe&nbsp;7F0&nbsp;&harr;&nbsp;5D0&nbsp;transition of Eu3+&nbsp;even for nanoscale&nbsp;films. Furthermore, about 1.5 ms<br>\nlifetime has been measured for the infrared telecom transition of Er in ultrathin&nbsp;films (&lt;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&nbsp;films as a suitable platform for photonics applications where few-nanometer-thick&nbsp;films with well-localized emitters are mandatory. This approach provides the&nbsp;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>", 
  "title": "Ultrathin Eu- and Er-Doped Y2O3 Films with Optimized Optical Properties for Quantum Technologies", 
  "type": "article-journal", 
  "id": "3250542"
}
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