Pump-probe studies of electron dynamics in quantum wells and superlattices
Pump-probe studies of electron dynamics in quantum wells and superlattices
Helm, M.
After introducing the infrared/THz free-electron laser (FEL) facility at the Research Center Dresden-Rossendorf, I will discuss some pump-probe experiments to study the electron relaxation dynamics in superlattices. Both one-color, but also two-color experiments have been performed using the FEL, and, in addition, THz radiation generated by optical rectification in GaSe as the probe beam. In the second part of my talk I will discuss the intersubband dynamics in thin InGaAs/AlAsSb quantum wells, which are important for short-wavelength quantum cascade lasers. These experiments were performed using a femtosecond OPO system and yield information on the relevance of intervalley scattering.
Keywords: pump-probe; quantum well; superalttice; infrared; free-electron laser
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Lecture (others)
Seminarvortrag am Institute of Industrial Science, Tokyo University, 27.02.2008, Tokyo, Japan -
Lecture (others)
Seminarvortrag am Research Institute of Electrical Communication (RIEC), Tohoku University, 14.03.2008, Sendai, Japan
Permalink: https://www.hzdr.de/publications/Publ-11153