MICHLER, P., VEHSE, M., GUTOWSKI, J., BEHRINGER, M., HOMMEL, D., PEREIRA, Mauro and HENNEBERGER, K. (1998). Influence of Coulomb correlations on gain and stimulated emission in (Zn,Cd)Se/Zn(S,Se)/(Zn,Mg)(S,Se) quantum-well lasers. Physical Review B, 58 (4), 2055-2063.
Full text not available from this repository.Abstract
The influence of Coulomb correlations on gain and stimulated emission in (Zn,Cd)Se/Zn(S,Se)/(Zn,Mg)(S,Se) quantum-well lasers is studied under stationary conditions. Systematic temperature-dependent measurements under application of different spectroscopic techniques were performed. Optical gain is measured by means of the variable stripe-length method, whereas excitonic bleaching under lasing conditions is analyzed through two-beam photoluminescence excitation (PLE) spectroscopy. Furthermore, complementary low-density single-beam PLE spectra are recorded in order to study the temperature dependence of the heavy-hole exciton peaks. The experimental data as a whole are shown to be inconsistent with any of the usually quoted excitonic models for lasing in II-VI heterostructures. The experiments are more adequately explained by a strongly correlated electron-hole plasma described by Bethe-Salpeter-like equations for the optical response and recombination rates in the excited medium. The nonequilibrium Green’s-function approach used consistently includes, at a microscopic level, band structure, quantum-confinement, and many-body effects.
Item Type: | Article |
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Research Institute, Centre or Group - Does NOT include content added after October 2018: | Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group |
Identification Number: | https://doi.org/10.1103/PhysRevB.58.2055 |
Page Range: | 2055-2063 |
Depositing User: | Helen Garner |
Date Deposited: | 18 Nov 2014 15:54 |
Last Modified: | 18 Mar 2021 19:15 |
URI: | https://shura.shu.ac.uk/id/eprint/8801 |
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