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Proceedings Paper

Carrier dynamics and homogeneous broadening in quantum dot waveguides
Author(s): Kevin L. Silverman; Richard P. Mirin; Steven T. Cundiff; Benjamin Klein
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Paper 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.

Paper Details

Date Published: 4 April 2005
PDF: 12 pages
Proc. SPIE 5734, Quantum Dots, Nanoparticles, and Nanoclusters II, (4 April 2005); doi: 10.1117/12.598040
Show Author Affiliations
Kevin L. Silverman, National Institute of Standards and Technology (United States)
Richard P. Mirin, National Institute of Standards and Technology (United States)
Steven T. Cundiff, National Institute of Standards and Technology (United States)
Univ. of Colorado/Boulder (United States)
Benjamin Klein, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5734:
Quantum Dots, Nanoparticles, and Nanoclusters II
Diana L. Huffaker; Pallab K. Bhattacharya, Editor(s)

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