POLARIZED INFRARED-SPECTRA OF INTERSUBBAND TRANSITIONS IN GAAS ALGAASSTEP MULTIQUANTUM WELLS/

The polarization dependence of conduction intersubband transitions in GaAs/AlGaAs step multiquantum well structures has been studied using i nfrared spectroscopy. For S-polarized 45 degrees oblique angle inciden ce configuration with respect to sample surface: normal. the transvers e electric (TE) active intersubband transitions were observed. Both tr ansverse electric and transverse magnetic (TM) active intersubband tra nsitions were obtained in P-polarized incidence at 45 degrees angle on sample. which shows it small energy splitting between TE and TM absor ption peaks.