Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2010-08-11
Physics
Condensed Matter
Other Condensed Matter
4 pages, 2 figures. New data, less theory
Scientific paper
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.
Choi Byeong S.
Cundiff Steven T.
Dessau Daniel S.
Kannan Senthamarai S.
Sipe John E.
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