Abstract
We present the first study of the ultrafast dynamics of coherent intersubband polarizations in a two-dimensional electron plasma using femtosecond four-wave-mixing in the mid-infrared. Experiments with modulation-doped GaInAs/AlInAs multiple-quantum-well samples of different doping concentrations show a fast decay of the coherent third-order intersubband polarization on a sub-500 fs time scale, depending strongly on carrier density and lattice temperature. Electron-electron scattering is identified as the main dephasing scattering mechanism.
Original language | English (US) |
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Pages (from-to) | 27-30 |
Number of pages | 4 |
Journal | Physica Status Solidi (B) Basic Research |
Volume | 204 |
Issue number | 1 |
DOIs | |
State | Published - Nov 1997 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics