Laser-Induced Above-Band-Gap Transparency in GaAs
Abstract
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2004
- DOI:
- 10.1103/PhysRevLett.93.157401
- arXiv:
- arXiv:cond-mat/0403528
- Bibcode:
- 2004PhRvL..93o7401S
- Keywords:
-
- 78.20.Jq;
- 42.50.Md;
- 78.30.Fs;
- 78.47.+p;
- Electrooptical effects;
- Optical transient phenomena: quantum beats photon echo free-induction decay dephasings and revivals optical nutation and self-induced transparency;
- III-V and II-VI semiconductors;
- Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter;
- Materials Science;
- Mesoscopic Systems and Quantum Hall Effect
- E-Print:
- 4 pages, 4 figures