Cooling of a carrier plasma in germanium investigated with subpicosecond infrared pulses

Roskos, H.; Rieck, B.; Seilmeier, A.; Kaiser, W.
December 1988
Applied Physics Letters;12/12/1988, Vol. 53 Issue 24, p2406
Academic Journal
An intense light pulse of 1.0 eV photons generates a hot-carrier plasma in germanium with a density of several 1017 cm-3. Cooling of the carriers results in a rise of the transmission at hω=1.0 eV within a few picoseconds. Three carrier-phonon interactions based on deformation potential scattering contribute to the carrier relaxation: electron and hole intravalley scattering and intervalley electron scattering. The interaction constants for carrier cooling do not depend on lattice temperature between 30 and 300 K.


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