Schätz, A., Wagner, H.P., Maier, R., Preis, H., Frey, T., Reisinger, T., Gebhardt, W., Langbein, Wolfgang Werner ![]() |
Abstract
We investigate the transient four-wave mixing (FWM) response of wide ZnSe/Zn 1- xMg xSe single quantum wells in a two-beam self-diffraction configuration. The spectrally resolved FWM signals show excitonic transitions which are essentially homogeneously broadened, and show dephasing times between 1 and 2 ps at a lattice temperature of 10 K. Simultaneous excitation of several exciton states leads to pronounced quantum beats in the FWM signal. The formation of heavy-hole biexcitons with binding energies of E bXX = 3.5 ± 0.5 meV is identified by polarization-dependent measurements. These measurements also indicate that excitation-induced dephasing gives the main contribution to the FWM process.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QC Physics |
Publisher: | Elsevier |
ISSN: | 0022-0248 |
Last Modified: | 28 Oct 2022 08:41 |
URI: | https://orca.cardiff.ac.uk/id/eprint/71763 |
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