We study the dynamical Franz-Keldysh effect in the THz regime by subjecting a semiconductor quantum well to both a THz-frequency driving field and a 50 fs optical pulse. The double excitation scenario produces harmonically-generated upshifted THz transients - the creation of highly anisotripic electron-hole wavepackets. The results are in qualitative agreement with recent experimental measurements. Coherent control of the propagating wavepackets is demonstrated.

© 1998 Optical Society of America

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