Journal article
Elias Goldmann, M. Lorke, T. Frauenheim, F. Jahnke
2014
2014
Semantic Scholar
DOI
Cite
Cite
APA
Click to copy
Goldmann, E., Lorke, M., Frauenheim, T., & Jahnke, F. (2014). Negative differential gain in quantum dot systems: Interplay of structural properties and many-body effects.
Chicago/Turabian
Click to copy
Goldmann, Elias, M. Lorke, T. Frauenheim, and F. Jahnke. “Negative Differential Gain in Quantum Dot Systems: Interplay of Structural Properties and Many-Body Effects” (2014).
MLA
Click to copy
Goldmann, Elias, et al. Negative Differential Gain in Quantum Dot Systems: Interplay of Structural Properties and Many-Body Effects. 2014.
BibTeX Click to copy
@article{elias2014a,
title = {Negative differential gain in quantum dot systems: Interplay of structural properties and many-body effects},
year = {2014},
author = {Goldmann, Elias and Lorke, M. and Frauenheim, T. and Jahnke, F.}
}
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.
