Interband Optical Transitions in the Region of Excitonic Resonance in In0.3Ga0.7As/GaAs Quantum Wells

Abstract

Reflection spectra of In0.3Ga0.7As layers with 8nm thickness with quantum wells limited by GaAs barrier layer with 100nm thickness (bottom) and 9nm (upper) had been measured at S and P polarizations in the interval of photon energies 0.6 – 1.6eV at an incident angle near the normal one (4.5о) and Brewster angle (76 о). Thin absorption lines 0.9021eV, 1.0161eV, 1.1302eV, 1.1973eV, 1.2766eV conditioned by the transitions hh1-e1(1s), lh1-e1(1s), hh2-e2(1s), lh2e-2(1s), hh3-3(1s) and lh3-3e(1s) had been revealed. The intensity of absorption lines changes in the limits 10 – 70%.