Electronic band-structure engineering of GaAs/AlxGa 1-xAs quantum well superlattices with substructures

Mingrong Shen, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We report a theoretical investigation on the band structures of electrons in both infinite and finite semiconductor quantum well/barrier superlattices with each unit cell containing alternately two types of materials. When the unit cell of a superlattice, made of GaAs and AlxGa1-xAs, is further divided into four and six sublayers of these two materials, narrower passbands and/or broad stopbands can be obtained for electrons with energy slightly larger than the potential barrier. When a finite superlattice has two different periods and each unit cell contains six sublayers of alternating GaAs and AlxGa1-xAs, very sharp passbands can be obtained for electron energy right below and above the potential barrier. The results may be used to build a high-Q electron energy filter.

Original languageEnglish (US)
Pages (from-to)122-127
Number of pages6
JournalMaterials Science and Engineering: B
Issue number2
StatePublished - Oct 15 2003

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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