Abstract
We show that a low-intensity femtosecond pulse is severely distorted while propagating through a relatively thin (<7000 Å) GaAs multiple-quantum-well sample and that this pulse distortion depends critically on the dephasing time and the total thickness l. An interferometric measurement reveals the existence of well-defined nodes at which the envelope function changes its sign. This pulse distortion significantly affects femtosecond experiments such as pump-probe or four-wave-mixing experiments.
- Received 9 September 1993
DOI:https://doi.org/10.1103/PhysRevB.48.17902
©1993 American Physical Society