Carrier Relaxation Dynamics in Self-Assembled Quantum Dots
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| Valentin G. Davydov1), Ivan V. Ignatiev1) and Igor E. Kozin1) |
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| 1) Spectroscopic analysis group |
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| Carrier relaxation dynamics is studied by the technique of the electric field induced nonradiative losses and by the Photoluminescence kinetics measurements. Different channels of the carrier relaxation are observed for the heterostructures with InP and InGaAs quantum dots. The conditions when a phonon-assisted carrier relaxation occurs are determined. A few evidences of relatively fast acoustic-phonon-assisted relaxation are found. Different mechanisms of acceleration of the carrier relaxation via carrier-carrier scattering are discussed. Most important of them are an Auger-like process, an interaction with excess carrier in charged quantum dots and an electric-current-induced relaxation. |
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