Journal article Open Access

Control of Electron State Coupling in Asymmetric Ge/GeSi Quantum Wells

Ciano, Chiara; Virgilio, Michele; Montanari, Michele; Persichetti, Luca; Di Gaspare, Luciana; Ortolani, Michele; Baldassarre, Leonetta; Zoellner, Marvin H.; Skibitzki, Oliver; Scalari, Giacomo; Faist, Jerome; Paul, Douglas J.; Scuderi, Mario; Nicotra, Giuseppe; Grange, Thomas; Birner, Stefan; Capellini, Giovanni; De Seta, Monica


JSON-LD (schema.org) Export

{
  "description": "<p><em>Theoretical predictions indicate that the n-type Ge/SiGe multi quantum-well system is the most promising material for the realization of a Si-compatible THz quantum cascade laser operating at room temperature. To advance in this direction, we study both experimentally and theoretically asymmetric coupled multi quantum-well samples based on this material system, that can be considered as the basic building block of a cascade architecture. Extensive structural characterization shows the high material quality of strain-symmetrized structures grown by chemical vapor deposition, down to the ultrathin barrier limit. Moreover, THz absorption spectroscopy measurements supported by theoretical modeling unambiguously demonstrate inter-well coupling and wavefunction tunneling. The agreement between experimental data and simulations allowed us to characterize the tunneling barrier parameters and, in turn, achieve a highly-controlled engineering of the electronic structure in forthcoming unipolar cascade systems based on n-type Ge/SiGe multi quantum-wells.</em></p>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Ciano, Chiara"
    }, 
    {
      "@type": "Person", 
      "name": "Virgilio, Michele"
    }, 
    {
      "@type": "Person", 
      "name": "Montanari, Michele"
    }, 
    {
      "@type": "Person", 
      "name": "Persichetti, Luca"
    }, 
    {
      "@type": "Person", 
      "name": "Di Gaspare, Luciana"
    }, 
    {
      "@type": "Person", 
      "name": "Ortolani, Michele"
    }, 
    {
      "@type": "Person", 
      "name": "Baldassarre, Leonetta"
    }, 
    {
      "@type": "Person", 
      "name": "Zoellner, Marvin H."
    }, 
    {
      "@type": "Person", 
      "name": "Skibitzki, Oliver"
    }, 
    {
      "@type": "Person", 
      "name": "Scalari, Giacomo"
    }, 
    {
      "@type": "Person", 
      "name": "Faist, Jerome"
    }, 
    {
      "@type": "Person", 
      "name": "Paul, Douglas J."
    }, 
    {
      "@type": "Person", 
      "name": "Scuderi, Mario"
    }, 
    {
      "@type": "Person", 
      "name": "Nicotra, Giuseppe"
    }, 
    {
      "@type": "Person", 
      "name": "Grange, Thomas"
    }, 
    {
      "@type": "Person", 
      "name": "Birner, Stefan"
    }, 
    {
      "@type": "Person", 
      "name": "Capellini, Giovanni"
    }, 
    {
      "@type": "Person", 
      "name": "De Seta, Monica"
    }
  ], 
  "sameAs": [
    "https://doi.org/10.1103/PhysRevApplied.11.014003"
  ], 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "datePublished": "2018-12-16", 
  "headline": "Control of Electron State Coupling in Asymmetric Ge/GeSi Quantum Wells", 
  "url": "https://zenodo.org/record/2319242", 
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.5281/zenodo.2319242", 
  "@id": "https://doi.org/10.5281/zenodo.2319242", 
  "@type": "ScholarlyArticle", 
  "name": "Control of Electron State Coupling in Asymmetric Ge/GeSi Quantum Wells"
}
116
66
views
downloads
All versions This version
Views 116116
Downloads 6666
Data volume 65.8 MB65.8 MB
Unique views 104104
Unique downloads 6363

Share

Cite as