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Modelling of temperature effects on the characteristics of mid-infrared quantum cascade lasers |
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| Authors: | A Hamadou J-L Thobel S Lamari |
| Institution: | a Département de Génie Mécanique, Faculté des Sciences et Sciences de l’ingénieur, Université Abdelhamid Ibn Badis de Mostaganem, BP 227 Mostaganem, 27000 Algérie, Algeria b Institut d’Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR 8520, Université des Sciences et Technologies de Lille, Avenue Poincaré, BP 60069, 59652 Villeneuve d’Ascq Cédex, France c Département de Physique, Faculté des Sciences, Université Ferhat Abbas de Sétif, Cité Mabouda, 19000 Algérie, Algeria |
| Abstract: | The effect of temperature on the characteristics of GaAs/AlGaAs quantum cascade lasers operating in the mid-infrared range is theoretically investigated and compared with reported experimental results. We have included the dependence of the phonon scattering rate, linewidth variations and thermionic lifetime on temperature. It is found that the characteristics depend strongly on temperature. Our model yields threshold current densities in good agreement with the experiments. The effect of injection efficiency on the unsaturated modal gain is also considered. |
| Keywords: | Quantum cascade laser Temperature dependence Thermionic emission Unsaturated modal gain Threshold current density Output power |
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