Optical response and local-field distribution in a Poeschl-Teller quantum well: Nonlocal effects

The local-field distribution and optical absorption from the intersubband transitions in semiconductor Poeschl-Teller quantum wells are investigated with the self-consistent-field methods by taking into account the nonlocal coupling between the polarizability of electrons and the local field. The numerical results show that the local field inside the quantum wells has a strong resonance and the resonant absorption peak appears with a blueshift due to the nonlocal effects. The influence of the quantum well width, the donor concentration and the angle of incidence on the blueshift, and the local-field correction is clarified. In addition, it is demonstrated that the optical spectra show a strong dependence on the intensity of the incident light. These optical properties may be instructive for future precise experiments and practical applications in optical devices