Tuning of the exciton-photon coupling in semiconductor quantum
microcavities by external electric and magnetic fields

    T.A. Fisher, Maurice S. Skolnick, A.M. Afshar, D.M. Whittaker, 
            P.Kinsler, John S. Roberts, G.Hill, M.A. Pate.

    Department of Physics/Department of Electronic and Electrical Engineering
    University of Sheffield, 
    Sheffield S3 7RH, 
    United Kingdom.

    SPIE Proceedings Vol. 2694
    "Quantum Well and Superlattice Physics VI"
    Eds. Gottfried H. Doehler, Theodore S. Moise, pages 76-81, 1996.


       Tuning of the vacuum Rabi exciton-photon coupling in
       semiconductor quantum microcavity structures by
       external electric and magnetic fields is presented.
       Contrasting effects due to the two external
       perturbations are found, principally due to the
       decrease of exciton oscillator strength in electric
       field and increase of oscillator strength in magnetic
       field. The strong coupling limit is easily achieved in
       these high quality structures with line widths on
       resonance as small as 1 meV. In addition to the tuning
       phenomena, the effects of exciton Zeeman splitting on
       the spectra and unexpected linewidth narrowing
       phenomena on resonance are reported. 

Email: Dr.Paul.Kinsler@physics.org