Electromagnetically induced transparency in quantum wells

We show how to compute nonlinear optical absorption spectra of an asymmetric double quantum well in the region of intersubband electronic transitions. The method uses the microscopic calculation of the dephasing due to electron-electron and electron-phonon scattering rates and the macroscopic real density matrix approach to compute the electromagnetic fields and susceptibilities. For a proper choice of the QW widths and of the driving fields we obtain electromagnetically induced transparency. Results are given for GaAs/GaAlAs QWs and experiments are proposed.