Dynamic Franz-Keldysh effect: perturbative to nonperturbative regime.
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.
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Hughes
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Citrin