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24 September 2013 Injection schemes in THz quantum cascade lasers under operation
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Abstract
The two main design schemes for Terahertz quantum cascade lasers, based on tunnelling and scattering injection, respectively, are theoretically compared. We apply our simulation package based on the non-equilibrium Green’s function technique. Our results provide a good description of the gain degradation with temperature. Thermal backfilling contributes to decrease of population inversion in both cases. However, the dropping inversion cannot account for the total reduction of gain.
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M. Lindskog, D. O. Winge, and A. Wacker "Injection schemes in THz quantum cascade lasers under operation", Proc. SPIE 8846, Terahertz Emitters, Receivers, and Applications IV, 884603 (24 September 2013); https://doi.org/10.1117/12.2024030
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