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- W2037025923 abstract "The saturation behaviour of optical gain with increasing excitation density is an important factor for laser device performance. For active materials based on self-organized InGaAs/GaAs quantum dots, we study the interplay between structural properties of the quantum dots and many-body effects of excited carriers in the optical properties via a combination of tight-binding and quantum-kinetic calculations. We identify regimes where either phase-space filling or excitation-induced dephasing dominates the saturation behavior of the optical gain. The latter can lead to the emergence of a negative differential material gain." @default.
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- W2037025923 date "2014-06-16" @default.
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- W2037025923 title "Negative differential gain in quantum dot systems: Interplay of structural properties and many-body effects" @default.
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- W2037025923 doi "https://doi.org/10.1063/1.4884382" @default.
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