Effect of Surface Steps on the Microstructure of Lateral Composition Modulation

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

Research output: Contribution to journalArticlepeer-review

14 Scopus Citations


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.

Original languageAmerican English
Pages (from-to)669-671
Number of pages3
JournalApplied Physics Letters
Issue number5
StatePublished - 2000

NREL Publication Number

  • NREL/JA-590-29061


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