This study attempts to reduce the fast increase of threshold current densities J/sub TH/ with temperature by optimising the performance of a recently demonstrated superlattice QCL emitting at /spl lambda/ = 100 /spl mu/m using different active region doping levels. In addition, this work studies the injection efficiency as a function of the thickness of the Al/sub 0.15/Ga/sub 0.85/As barrier controlling the tunnel coupling between the superlattice miniband and the upper state of the laser transition.


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    Titel :

    Optimisation of resonant tunnelling injection and doping density in high-performance THz superlattice quantum cascade lasers


    Beteiligte:
    Barbieri, S. (Autor:in) / Alton, J. (Autor:in) / Worrall, C. (Autor:in) / Houghton, M. (Autor:in) / Beere, H.E. (Autor:in) / Linfield, E.H. (Autor:in) / Ritchie, D.A. (Autor:in)


    Erscheinungsdatum :

    01.01.2004


    Format / Umfang :

    108515 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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