S. Strauf 1 , S. M. Ulrich 1 , K. Sebald 1 , P. Michler *,1 , T. Passow 2 , D. Hommel 2 , G. Bacher 3 , and A. Forchel 1 Institute for Solid State Physics, Semiconductor Optics, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany 2 Institute for Solid State Physics, Semiconductor Epitaxy, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany 3 Technical Physics, University of Wü...
