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arXiv · 1008.1893

Electric field-induced quantum interference control in a semiconductor: A new manifestation of the Franz-Keldysh effect

J. K. Wahlstrand·H. Zhang·S. B. Choi·S. Kannan·D. S. Dessau·J. E. Sipe·S. T. Cundiff
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Abstract

In (100)-oriented GaAs illuminated at normal incidence by a laser and its second harmonic, interference between one- and two-photon absorption results in ballistic current injection, but not modulation of the overall carrier injection rate. Results from a pump-probe experiment on a transversely biased sample show that a constant electric field enables coherent control of the carrier injection rate. We ascribe this to the nonlinear optical Franz-Keldysh effect and calculate it for a two-band parabolic model. The mechanism is relevant to centrosymmetric semiconductors as well.

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J. K. Wahlstrand, H. Zhang, S. B. Choi, S. Kannan, D. S. Dessau, J. E. Sipe, S. T. Cundiff. 2011-03-29. Electric field-induced quantum interference control in a semiconductor: A new manifestation of the Franz-Keldysh effect. https://arxiv.org/abs/1008.1893

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