Browsing by Author "Cho, W. S."

Now showing items 1-4 of 4

    • Article  

      Efficient spin detection across the hybrid Co/GaAs schottky interface 

      Trypiniotis, Theodossis; Tse, D. H. Y.; Steinmuller, S. J.; Cho, W. S.; Bland, J. A. C. (2007)
      The electron spin detection efficiency was studied across Co/GaAs structures using photoexcitation techniques. Two sets of samples were prepared where the substrate surface was pretreated by annealing prior to growth for ...
    • Article  

      Electron spin filtering in ferromagnet/semiconductor heterostructures 

      Bland, J. A. C.; Steinmuller, S. J.; Hirohata, A.; Cho, W. S.; Xu, Y. B.; Guertler, C. M.; Wastlbauer, G.; Ionescu, A.; Trypiniotis, Theodossis; Holmes, S. N. (2003)
      Circularly polarized light was used to generate spin-polarized electrons at room temperature in ferromagnet (FM)/GaAs Schottky diode structures. A change in the helicity-dependent photocurrent was obtained when the ...
    • Article  

      Highly efficient spin filtering of ballistic electrons 

      Steinmuller, S. J.; Trypiniotis, Theodossis; Cho, W. S.; Hirohata, A.; Lew, W. S.; Vaz, C. A. F.; Bland, J. A. C. (2004)
      Spin dependent electron transport in hybrid Au/Co/Cu/NiFe/n-GaAs spin valve Schottky barrier structures was investigated using photoexcitation at various wavelengths. For excitation with the photon energy well above the ...
    • Conference Object  

      Highly efficient spin filtering of ballistic electrons in hybrid spin valve/semiconductor structures 

      Steinmuller, S. J.; Trypiniotis, Theodossis; Hirohata, A.; Cho, W. S.; Lew, W. S.; Vaz, C. A. F.; Bland, J. A. C. (2004)
      The highly efficient spin filtering of ballistic electrons in hybrid spin valve/semiconductor (SC) structures was discussed. It was found that the photocurrent was dependent on the relative alignment of the light helicity ...