ENERGY-LEVELS OF SINGLE AND COUPLED QUANTUM-WELLS EMBEDDED IN CYLINDRICAL BUFFER BARRIERS AFFECTED BY AN AXIAL MAGNETIC-FIELD

Energy levels of an electron in single and coupled quantum wells embed ded in cylindrical buffer barriers are studied under the influence of an axial magnetic field. An iteration algorithm which matches the boun dary conditions of the wave function across interfaces is developed. I t is shown that energy levels are tuned continuously as a function of the magnetic field strength. The degeneracy of energy levels occurring in planar coupled quantum wells for large barrier thickness is comple tely lifted due to the break of the symmetry in the cylindrical couple d quantum wells. Potential applications for tunable semiconductor lase rs are proposed.