Annual Report for 1 October 1992-30 September 1993 on Contract N00014- 90-J-1267 (University of Illinois)
ILLINOIS UNIV CHAMPAIGN
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We performed theoretical calculations on the electronic structures of ZnSemCd1-xZnxSen superlattices. First-principle pseudopotential calculations are used to obtain the valence-band offset for CdSe grown on ZnSe. We then use an empirical non-local pseudopotential method to calculate the band structures and effective masses of ZnSemCd1-xZnxSen superlattices grown on ZnSe, including the spin-orbit interaction. The effects of strain due to lattice mismatch have been properly taken into account. We have also studied the band gap as a function of composition and layer thicknesses of constituent materials in superlattices. The results are in agreement with recent experiment. The quantum well made from these materials is an important candidate for quantum-well lasers operating in the blue-green wavelengths.
- Inorganic Chemistry
- Electrical and Electronic Equipment
- Atomic and Molecular Physics and Spectroscopy