MODELING OF INGAAS INALAS COUPLED DOUBLE-QUANTUM WELLS/

A symmetric coupled double-quantum-well (CDQW) structure in InGaAs/InA lAs lattice matched to InP can give enhanced Stark effects for electro absorption modulation near 1.3 mum. The optical features of this mater ial are the dramatic quenching of the heavy-hole exciton and the simul taneous emergence of the normally forbidden higher-order transitions. An effective-mass model for the double-quantum-well structure yields p redictions in good agreement with experimental results. The model can be used to predict the optical properties of not only symmetric CDQWs but also asymmetric structures as well.