Coupling of GaAs laser radiation into (AlGa)As thin-film waveguide structures

Abstract

The effects of inhomogeneities of the drive field H, and of the in-plane anisotropy on the generation of vertical Bloch line pairs in the stripe domain wall were investigated numerically. It was found that the inhomogeneity of H, does not cause the generation of vertical Bloch line pairs in the linear range of wall motion (i.e. H, < HzcriJ. In the case of the inhomogeneity of the in-plane anisotropy, however, the generation of vertical Bloch lines appears also for H, < H,,,,,,provided that such an inhomogeneity is sufficiently large.