Abstract
The semiconductor photocathode with AlGaAs/GaAs superlattice structures, which is a highly durable electron beam source with low energy dispersion, were grown by molecular beam epitaxy. The sample showed a step-like quantum efficiency spectrum of photoelectron emission, indicating its applicability to photocathodes. The optimization of room temperature photoluminescence provides the improvement of the photocathode quantum efficiency up to 0.5%, promising for its further improvement and realistic applications.
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