In recent publications, a large enhancement of the third order nonlinear optical susceptibility was predicted for GaAs-GaAIAs superlattices, as a result of the band nonparabolicities introduced by the additional periodicity of the superlattice. These predictions, based on the tight binding model, are here extended to the more realistic Kronig-Penney model. Results show that corrections to tight binding are non-negligible; however, enhancements of χ⁽³⁾ are still large, but reduced by approximately 30%-50% over previous estimates.
nonlinear optics, gallium arsenides, aluminium arsenides, superlattices, optical susceptibility, thin films
Superlattices as materials, Nonlinear optics
Semiconductor and Optical Materials
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American Institute of Physics
Cooperman, Gene D.; Friedman, L.; and Bloss, W. L., "Corrections to enhanced optical nonlinearity of superlattices" (1984). Computer and Information Science Faculty Publications. Paper 14. http://hdl.handle.net/2047/d20000659
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