Franz–Keldysh electrorefraction and electroabsorption in bulk InP and GaAs

Van Eck, T. E.; Walpita, L. M.; Chang, W. S. C.; Wieder, H. H.
February 1986
Applied Physics Letters;2/17/1986, Vol. 48 Issue 7, p451
Academic Journal
Franz–Keldysh electrorefraction and electroabsorption were measured for semi-insulating InP and GaAs at several electric fields and several wavelengths near the absorption edge. For InP, the experimental results are described well by an effective mass approximation theory with a correction that accounts for the exponential absorption tail. It is shown that, at least in InP, Franz–Keldysh electrorefraction is under some conditions much stronger than the Pockels effect.


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