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Characterizing intra-exciton Coulomb scattering in terahertz excitations
S. Zybell, , S. Winnerl, F. Eßer, M. Helm, H. Schneider, L. Schneebeli, C.N. Böttge, M. Kira, S.W. KochShow More
Published in American Institute of Physics Inc.
2014
Volume: 105
   
Issue: 20
Abstract
An intense terahertz field is applied to excite semiconductor quantum wells yielding strong non-equilibrium exciton distributions. Even though the relaxation channels involve a complicated quantum kinetics of Coulomb and phonon effects, distinct relaxation signatures of Coulomb scattering are identified within time-resolved photoluminescence by comparing the experiment with a reduced model that contains all relevant microscopic processes. The analysis uncovers a unique time scale for the Coulomb scattering directly from experiments and reveals the influence of phonon relaxation as well as radiative decay. © 2014 AIP Publishing LLC.
About the journal
JournalData powered by TypesetApplied Physics Letters
PublisherData powered by TypesetAmerican Institute of Physics Inc.
ISSN00036951