Abstract

Since the first experimental demonstrations^1,2 of the ultrafast optical Stark effect (OSE) on GaAs-AlGaAs multiple-quantum-well (MQW) excitons, OSE has been attracting investigators' interest because of its potential capability for ultrafast all-optical switching devices. Extensive theoretical^3,4 and experimental⁵ studies were reported heretofore. Recently, however, it has also been recognized that the real excitation inevitably excited by the pump pulse limits the switching repetition speed owing to its long level lifetime (in the nanosecond range).

© 1991 Optical Society of America