2007•Applied Physics LettersOpen access

Carrier capture dynamics of InAs∕GaAs quantum dots

Tomasz Piwoński, Ian O'Driscoll, John A. Houlihan, Guillaume Huyet, Robert J. Manning, Alexander V. Uskov

Abstract

Carrier dynamics of a 1.3μm InAs∕GaAs quantum dot amplifier is studied using heterodyne pump-probe spectroscopy. Measurements of the recovery times versus injection current reveal a power law behavior predicted by a quantum dot rate equation model. These results indicate that Auger processes dominate the carrier dynamics.

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Key concepts: Quantum dot, Rate equation, Dynamics (music), Auger effect, Spectroscopy, Physics, Amplifier, Materials science