Carrier dynamics and homogeneous broadening in quantum dot waveguides

Kevin L. Silverman; Richard P. Mirin; Steven T. Cundiff; Benjamin Klein

doi:10.1117/12.598040

4 April 2005 Carrier dynamics and homogeneous broadening in quantum dot waveguides

Kevin L. Silverman, Richard P. Mirin, Steven T. Cundiff, Benjamin Klein

Proceedings Volume 5734, Quantum Dots, Nanoparticles, and Nanoclusters II; (2005) https://doi.org/10.1117/12.598040
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

Coupling between InGaAs/GaAs quantum dots is investigated using differential transmission spectroscopy. Degenerate measurements show an initial carrier relaxation time that is relatively independent of carrier density. Two-color pump-probe techniques are used to spectrally resolve the carrier dynamics, revealing transfer between quantum dots and a homogeneous linewidth of 12 nm at room temperature. The time constant for carrier escape is shown to increase from 35 ps at room temperature to 130 ps at 230 K. We then employ a rate equation model to simulate the performance of a semiconductor optical amplifier with QDs as the active region.

Citation Download Citation

Kevin L. Silverman, Richard P. Mirin, Steven T. Cundiff, and Benjamin Klein "Carrier dynamics and homogeneous broadening in quantum dot waveguides", Proc. SPIE 5734, Quantum Dots, Nanoparticles, and Nanoclusters II, (4 April 2005); https://doi.org/10.1117/12.598040

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