Nonlinear Optical Effects in GaAs/AlGaAs Superlattices
Final rept. 1 Oct 1985-30 Sep 1989
HONEYWELL INC BLOOMINGTON MN
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The main purpose of this program was to thoroughly study the nature of the optical nonlinearities demonstrated in GaAs superlattices and show potential for device applications. The nonlinear properties in three main types of superlattices were investigated GaAsAlGaAs Gallium ArsenideAluminum Gallium Arsenide compositional superlattices, GaAs doping superlattices and GaAsAlGaAs Hetero-nipi superlattices. Compositional superlattices were studied because theoretical work done in the area of nonlinear optical effects in multiple quantum wells compositional superlattices in GaAsAlGaAs had evidence to show that due to the special properties of a superlattice, a 100X enhancement in the nonlinearity should be expected over that of bulk GaAs. In particular the dependence of the nonlinearity on the well thickness was studied both experimentally and theoretically. GaAs doping superlattices were investigated because it was believed that large nonlinearities could be induced at very low powers due to the tuneable carrier lifetime. The dependence of the nonlinearity of the power was studied. GaAsAlGaAs Hetero-nipis were studied as an extention of GaAs doping superlattices. Keywords Superlattices Gallium arsenide superlattices Nonlinear optical effects Compositional superlattices Superlattices optical behavior.
- Inorganic Chemistry