de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Probing scattering mechanisms with symmetric quantum cascade lasers

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons22094

Schuster,  Manfred Erwin
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)

probing_scattering_mechanisms.pdf
(beliebiger Volltext), 247KB

Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Deutsch, C., Detz, H., Zederbauer, T., Andrews, A. M., Klang, P., Kubis, T., et al. (2013). Probing scattering mechanisms with symmetric quantum cascade lasers. Optics Express, 21(6), 7209-7213. doi:10.1364/OE.21.007209.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-A0A8-F
Zusammenfassung
A characteristic feature of quantum cascade lasers is their unipolar carrier transport. We exploit this feature and realize nominally symmetric active regions for terahertz quantum cascade lasers, which should yield equal performance with either bias polarity. However, symmetric devices exhibit a strongly bias polarity dependent performance due to growth direction asymmetries, making them an ideal tool to study the related scattering mechanisms. In the case of an InGaAs/GaAsSb heterostructure, the pronounced interface asymmetry leads to a significantly better performance with negative bias polarity and can even lead to unidirectionally working devices, although the nominal band structure is symmetric. The results are a direct experimental proof that interface roughness scattering has a major impact on transport/lasing performance.