Abstract

Recently, approaches to either zero absorption accompanied by high index change¹ or induced transparency² have been predicted and observed in atomic systems. We have investigated analogous configurations in semiconductor quantum wells and have shown the possibility of inducing interband transparencies.³ Since previous perturbative density-matrix approaches in semiconductors have strict weak-field limits,⁴ analysis of a three-level quantum-well system is difficult. Here, for the first time to our knowledge, we show a general density- matrix formalism capable of treating both configurations without weak-field requirements. We formulate the coupled equations from the one-electron density-matrix equation

© 1993 Optical Society of America