Birefractive Effects In Quantum Wells

Reflective spectra had been researched in In0.3Ga0.7As quantum layers, modulated by the reflection and transmittance wavelength at P, P (S, S) and 45 degrees, 45 degrees (135 degrees, 135 degrees) light-wave polarizations at an incident angle near to the normal and Brewster ones. Isotropic wavelengths lambda(0) - 1.137 mu m (1.09 eV), lambda(02) - 1.11 mu m (1.12 eV) and lambda(03) - 0.932 mu m (1.09 eV) had been revealed. The refractive indexes n for P, P (S, S) and 45 degrees, 45 degrees (135 degrees, 135 degrees) were intersecting for these wavelengths and theirs difference Delta n = n(PP) - n(SS) (Delta n = n(45 degrees) - n(135 degrees)) intersects the null axis. The isotropic wavelength (lambda(0)) was shifted towards the long wavelength region at Brewster angle in reference to the case of perpendicular incidence of light (phi = 7 degrees) on the QW surface.