Publikation: Pump-probe spectroscopy of interminiband relaxation and electron cooling in doped superlattices
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Applied Physics Letters. 2006, 88, 151108. Available under: doi: 10.1063/1.2194868
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The picosecond dynamics of electrons in a doped GaAs/AlGaAs superlattice have been investigated by pump-probe experiments using an infrared free-electron laser. We observe a fast bleaching of the interminiband absorption followed by thermalization and a slower cooling component. The latter can lead to a positive or negative transmission change, resulting from the temperature dependence of the linear absorption spectrum at the respective wavelength. We show that the superlattice in contrast to quantum wells provides a unique picosecond thermometer for the electron temperature based on the dependence of the absorption on the electron distribution function.
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STEHR, Dominik, Stephan WINNERL, Manfred HELM, Thomas DEKORSY, Tomas ROCH, Gottfried STRASSER, 2006. Pump-probe spectroscopy of interminiband relaxation and electron cooling in doped superlattices. In: Applied Physics Letters. 2006, 88, 151108. Available under: doi: 10.1063/1.2194868BibTex
@article{Stehr2006Pumpp-9473,
year={2006},
doi={10.1063/1.2194868},
title={Pump-probe spectroscopy of interminiband relaxation and electron cooling in doped superlattices},
volume={88},
journal={Applied Physics Letters},
author={Stehr, Dominik and Winnerl, Stephan and Helm, Manfred and Dekorsy, Thomas and Roch, Tomas and Strasser, Gottfried},
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