Optical-field-dependent electron-electron scattering effects and gain generation in the intersubband transitions of n-doped quantum wells

摘要

We study the effect of electron-electron scattering on the polarization dephasing rates of infrared-coupled intersubband transitions in n-doped quantum wells. By numerical solution of the Boltzmann and optical Bloch equations we show how these rates depend on the properties of the infrared field and the doped quantum well. We also determine the electron distributions in each subband for various field intensities and detunings. We show that when the system is probed by a weak infrared field, a tunable Raman-type gain spectrum can be generated under certain conditions. [References: 37]