Electro-Optical Bistability and Multistability in GaAs/AlAs Superlattices with Different Miniband Widths

Abstract
We have studied room temperature operation of self-electro-optic effect devices utilizing Wannier-Stark localization in GaAs/AlAs superlattices by photocurrent spectroscopy. Correlation between device characteristics and superlattice structures is studied in detail. Bistable operation is obtained with a high on/off ratio in a particular range of miniband widths. We also show multistability due to higher-order Stark-ladder transitions in wider miniband superlattices.