Phys. Rev. Lett. 93, 157401 (2004) [4 pages]

Laser-Induced Above-Band-Gap Transparency in GaAs

Abstract

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Ajit Srivastava, Rahul Srivastava, Jigang Wang, and Junichiro Kono^*
Department of Electrical and Computer Engineering, Rice Quantum Institute, and Center for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, USA

Received 20 March 2004; published 4 October 2004

We report the observation of large (∼40%) laser-induced above-band-gap transparency in GaAs at room temperature. The induced transparency is present only during the pulse width of the driving midinfrared laser pulses and its spectral shape is consistent with a laser-induced blueshift 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 ponderomotive potential.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.93.157401

DOI:

10.1103/PhysRevLett.93.157401

PACS:

78.20.Jq, 42.50.Md, 78.30.Fs, 78.47.+p

^*To whom correspondence should be addressed.

Electronic address: kono@rice.edu

URL: http://www.ece.rice.edu/~kono

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Phys. Rev. Lett. 93, 157401 (2004) [4 pages]

Laser-Induced Above-Band-Gap Transparency in GaAs