Optical studies of spin injection and detection at ferromagnet / semiconductor interfacesJ.A.C. Bland, S.J. Steinmuller, A. Hirohata, W.S. Cho, Y.B. Xu, C.M. Guertler, G. Wastlbauer, A. Ionescu, T. Taniyama and T. TrypiniotisEurophysics News, 34 6 (2003) 240-242DOI: https://doi.org/10.1051/epn:2003613