POLARON EFFECTS ON THE OPTICAL RECTIFICATION IN ELECTRIC-FIELD-BIASED PARABOLIC QUANTUM-WELLS

Second-order susceptibilities are calculated for weak-coupling optical polaron systems in the electric-field-biased parabolic quantum well structure. Most emphasis is devoted to the electron-LO-phonon interaction. The origin of the large optical rectification lies in the possibility of tuning independently the parabolic potential shape (force constant D in the potential is tunable) and the applied bias field F. The theoretical value of the optical rectification in this structure is more than a factor of 10 higher than in the structure where the electron-LO-phonon interaction is ignored. It has been shown that our results are independent of the electron-electron interaction and of the number of electrons in the parabolic quantum well.