Electron localization in an asymmetric double quantum well nanostructure

The localization behavior of an asymmetric coupled quantum well (CQW) driven by two orthogonal standing-wave lasers based on intersubband transitions is investigated. We have shown that the precision of localization of the electron depends on different controlling parameters in the medium. We find that the high-spatial- resolution and high-precision-localization of the electron can be achieved through proper adjustment of the standing-wave fields. This scheme manifests a high controllability for the formation of the electron localization through different parameters such as frequency detuning and intensity of fields and level splitting energy between the bonding and anti-bonding states.