We study theoretically the dynamic Franz–Keldysh effect for quantum wells excited by a cw optical field and a terahertz (THz) frequency driving field. By monitoring the THz sidebands one can show that for, increasing THz-field amplitudes, nonperturbative effects become predominant, and one must account for THz-field-induced nonlinearities to all orders.
© 2000 Optical Society of America
S. Hughes and D. S. Citrin, "Dynamic Franz—Keldysh effect: perturbative to nonperturbative regime," Opt. Lett. 25, 493-495 (2000)