Quadratic electro-optic light modulation in a GaAs/AlGaAs multiquantum well heterostructure near the excitonic gap

Glick, M.; Reinhart, F. K.; Weimann, G.; Schlapp, W.
April 1986
Applied Physics Letters;4/14/1986, Vol. 48 Issue 15, p989
Academic Journal
The electro-optic effect has been investigated in a GaAs/AlGaAs multiquantum well waveguide structure 50 meV from the excitonic transition. We extract r41=-1.6×10-10 cm/V and (R11-R12)=6×10-16 cm2/V2, nonlinear optical characteristics that differ from homogeneous GaAs layers. This (R11-R12) value is similar in magnitude but opposite in sign to that found in InGaAsP 130 meV from the band gap.


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