OPTICAL-TRANSITION ENERGIES OF GAINP QUANTUM-WELLS WITH GAINP ALINP SUPERLATTICE BARRIERS/

A systematic study on the optical transition energies of GaInP quantum wells with GaInP/AlInP superlattice barriers was carried out. It was found that the commonly used simple approach to regard the short-perio d superlattice barrier as a bulk barrier with a height of its miniband edge brought about a substantial error in calculating the quantized l evels in these structures. Instead, it was revealed that an excellent agreement between theory and experiment can be obtained when the wave function of each layer in the superlattice barriers is exactly calcula ted, demonstrating the validity of the effective-mass approximation fo r the quantum-well structures with superlattice barriers.