The dynamics of electronic excitations in a semiconductor quantum well after excitation with spatially localized optical pulses (≤ 1 μm, 100 fs) is analyzed. Ballistic transport of electron-hole excitations as well as dissipative processes which induce a dynamic cross-over to diffusive motion are investigated. In the coherent limit, far-field excitation of quantum well excitons results in the excitation of radiative modes, whereas near-field excitation yields wavepackets composed of radiative and nonradiative modes.
|Original language||English (US)|
|Number of pages||13|
|Journal||Physica Status Solidi (B) Basic Research|
|State||Published - Mar 1998|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics