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Laser-Induced Above-Bandgap Transparency in GaAs

A. Srivastava·R. Srivastava·J. Wang·J. Kono
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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.

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A. Srivastava, R. Srivastava, J. Wang, J. Kono. 2004-03-20. Laser-Induced Above-Bandgap Transparency in GaAs. https://doi.org/10.1103/physrevlett.93.157401

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