Spin polarized electron source based on strained AlInGaAs/AlGaAs superlattice

The optimized AlInGaAs/AlGaAs superlattice composition with strained quantum wells has been developed for the polarized electron source (application). The choice of hetero-layer composition and thickness is based on the calculations of superlattice band energy spectrum, photoabsorption spectrum and transport properties. The electron emission from the developed photocathodes demonstrates the maximal polarization to be above 90 %.