New photocathode for highly polarized electron emission has been developed, fabricated and studied. Polarized electron source is based on short‐period strained AlInGaAs/AlGaAs superlattice grown by MBE method. Deformation of AlInGaAs quantum well results in 85 meV energy splitting between heavy hole and light hole minibands. Electron emission from the developed photocathode demonstrates maximal polarization of 92% with quantum efficiency of 0.85%.

Topics
Superlattices, Photocathodes, Quantum wells, Quantum efficiency, Electron sources
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© 2008 American Institute of Physics.
2008
American Institute of Physics
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