The electro-absorption coefficient of a two-photon excitation in which phonons participate during the transitions is calculated for an indirect-gap semiconductor. Below Eg/2 tunneling is found, while above Eg/2 the Franz-Keldysh oscillations are absent.
© 2006 Optical Society of America
H. Garcia and R. Kalyanaraman, "Phonon-Assisted Two-Photon Absorption in the Presence of a DC-Field: The Nonlinear Franz-Keldysh Effect in Indirect Gap Semiconductors," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper JThC22.
References are not available for this paper.