Publications

Effect of surface steps on the microstructure of lateral composition modulation

Follstaedt, D.M.; Reno, J.L.; Jones, E.D.; Lee, S.R.; Norman, A.G.; Moutinho, H.R.; Mascarenhas, A.; Twesten, R.D.

Growth of InAs/AlAs short-period superlattices on appropriately miscut (001) InP substrates is shown to alter the microstructure of composition modulation from a two-dimensional organization of short compositionally enriched wires to a single dominant modulation direction with wire lengths up to ∼ 1 μm. The effects of miscut are interpreted in terms of surface step orientation and character. The material is strongly modulated and exhibits intense optical emission. The one-dimensional modulations appear potentially useful for new devices that take advantage of the preferred direction formed in the growth plane. © 2000 American Institute of Physics.