All-optical switching with a biexcitonic double lambda system

Abstract

A double lambda four level system could be implemented with biexcitonic transitions on GaAs quantum well We observed that the phase dependent biexcitonic transition could be explained by interference between one-photon and three-photon transition in a double lambda four-level system An ultralow-light switch pulse could control 80% of biexcitonic absorption which demonstrated all-optical switching with biexcitonic double lambda system (C) 2010 Elsevier B V All rights reserved