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Laser-Induced Above-Bandgap Transparency in GaAs

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arxiv cond-mat/0403528 v1 pith:MLUTB3R4 submitted 2004-03-20 cond-mat.mtrl-sci cond-mat.mes-hall

Laser-Induced Above-Bandgap Transparency in GaAs

A. Srivastava , R. Srivastava , J. Wang , J. Kono This is my paper
classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords laser-inducedtransparencyabove-bandgapbandedgegaasshiftamount
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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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