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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

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


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


    Publication date :

    2004-01-01


    Size :

    108515 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Optimisation of Resonant Tunnelling Injection and Doping Density in High-Performance THz Superiattice Quantum Cascade Lasers

    Lasers and Electro-optics Society (Institute of Electrical and Electronics Engineers) | British Library Conference Proceedings | 2004


    Superlattice quantum cascade lasers (Invited Paper) [3628-28]

    Tredicucci, A. / Capasso, F. / Gmachl, C. et al. | British Library Conference Proceedings | 1999


    Effective-mass superlattice as an injector in quantum cascade lasers

    Klymenko, M. V. / Safonov, I. M. / Shulika, O. V. et al. | British Library Online Contents | 2008


    High Performance Quantum Cascade Lasers

    Capasso, F. / Gmachl, C. / Tredicucci, A. et al. | British Library Online Contents | 1999


    High-performance terahertz quantum cascade lasers

    Kohler, R. / Tredicucci, A. / Beltram, F. et al. | IEEE | 2003