Polarization dependence of the two-photon Franz-Keldysh effect
arXiv:1010.3920 · doi:10.1103/PhysRevB.83.233201
Abstract
The effect of a constant electric field on two-photon absorption in a direct band gap semiconductor is calculated using an independent-particle theory. Two band structure models for GaAs are used: a two-band parabolic model and an eight-band "k dot p" model. Both predict a strong dependence of the two-photon electroabsorption spectrum on the polarization of the light with respect to the constant field. We attribute the polarization dependence to the strong effect of a constant field on intraband dynamics.
arXiv comment5 pages, 1 figure