Simulating terahertz quantum cascade lasers: Trends from samples from different labs

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Abstract

We present a systematic comparison of the results from our non-equilibrium Green's function formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers previously published in the literature. Employing identical material and simulation parameters for all samples, we observe that the discrepancies between measured and calculated peak currents are similar for samples from a given group. This suggests that the differences between experiment and theory are partly due to a lacking reproducibility for devices fabricated at different laboratories. Varying the interface roughness height for different devices, we find that the peak current under lasing operation hardly changes, so that differences in interface quality appear not to be the sole reason for the lacking reproducibility.

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  • Condensed Matter Physics
Original languageEnglish
Article number114302
JournalJournal of Applied Physics
Volume120
Publication statusPublished - 2016 Sep 16
Publication categoryResearch
Peer-reviewedYes

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David Winge, 2016 Nov, Lund: Lund University, Faculty of Science, Department of Physics, Division of Mathematical Physics. 162 p.

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