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Influence of electron-electron scattering on electron relaxation rates in three and four-level quantum cascade lasers in magnetic fields |
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| Authors: | Bo?idar Novakovi? Jelena Radovanovi? Vitomir Milanovi? Dragan Indjin |
| Affiliation: | a Faculty of Electrical Engineering, Bulevar kralja Aleksandra 73, 11120 Belgrade, Serbia b Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia c Institute of Microwaves and Photonics, School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK |
| Abstract: | The aim of this work is to calculate carrier relaxation rates from the upper laser level due to electron-electron interactions in three and four-level quantum cascade lasers (QCLs) in a strong magnetic field. The comparison between calculated results and previously obtained values for acoustical and optical-phonon scattering processes indicates that carrier-carrier scattering might have noticeable influence on laser output properties, depending on the structural design. Numerical results are presented for two λ ∼ 9 μm GaAs-based QCLs in magnetic fields between 20 T and 60 T and the band nonparabolicity is taken into account. |
| Keywords: | 72.10.&minus d 73.63.Hs |
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