Abstract
The behavior of carrier-carrier screening is investigated in a GaAs-GaAlAs quantum-well structure by measuring the band-to-band polarization dephasing with femtosecond photon echoes. The variation of the electron-hole-polarization dephasing time with the carrier concentration reveals the two-dimensional character of the short-range screening between the interacting carriers.
- Received 13 May 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.636
©1991 American Physical Society