title: How fast is excitonic electroabsorption?
abstract: Many semiconductor light modulators rely on changes in excitonic absorption induced by electric fields. We study their temporal response in the framework of a one-dimensional model, for which we solve exactly the timedependent Schrödinger equation. For a homogeneously broadened system, the electroabsorption response time is found to be simply the inverse of the (field-induced) exciton linewidth, which can be as short as 50 fsec.
authors.forename: S
authors.initials: S
authors.lastname: Schmitt-Rink
authors.forename: D S
authors.initials: DS
authors.lastname: Chemla
authors.forename: W H
authors.initials: WH
authors.lastname: Knox
authors.forename: D A
authors.initials: DA
authors.lastname: Miller