Laser-Induced Above-Bandgap Transparency in GaAs

Abstract

We report the observation of large ($\sim 40$) laser-induced above-bandgap transparency in GaAs at room temperature. The induced transparency is present only during the pulse width of the driving midinfrard laser pulses and its spectral shape is consistent with a laser-induced blue shift of the band edge. Our simulations based on the dynamic Franz-Keldysh effect reproduce the salient features of the experimental results, demonstrating in particular that the amount of the band edge shift is approximately given by the ponderomtive potential.

4 pages, 4 figures

References in corpus (3)

• Dynamical Franz-Keldysh effect
• Excitonic Dynamical Franz-Keldysh Effect
• Strong-field terahertz-optical mixing in excitons

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