Near-Band Edge Spectral Hole in Quantum Well: No Evidence for Subpicosecond Plasma Thermalization

• Authors: M. Mos̆ko , A. Mos̆ková
• Languages of publication: EN

Abstracts

EN

We show that at low carrier energies and densities the carriers in a two-dimensional Coulomb gas interact via classical unscreened carrier-carrier collisions. This allows us to calculate exactly the thermalization due to the two-dimensional carrier-carrier collisions in a nonthermal low-density (≈10^{10} cm^{-2}) two-dimensional plasma excited near the band edge of an undoped GaAs quantum well. The thermalization is found to be 10-15 times slower than the 200 fs thermalization deduced from the previous spectral-hole burning measurements, which means that the spectral hole does not reflect the thermalization process. We also show that the Born approximation fails in describing such carrier-carrier collisions.

Keywords

EN

73.50.-h   73.50.Bk   78.47.+p  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 5
• Pages: 1055-1059

Dates

published

1996-11

Identifiers

DOI

10.12693/APhysPolA.90.1055