6 May 1994 Femtosecond spectroscopy at the direct bandedge of germanium
Author Affiliations +
Proceedings Volume 2142, Ultrafast Phenomena in Semiconductors; (1994) https://doi.org/10.1117/12.175883
Event: OE/LASE '94, 1994, Los Angeles, CA, United States
We time-resolve the transient, photoinduced transmission and reflectivity changes near the direct bandedge of crystalline germanium (at 295 K) with 120-fs, tunable, infrared pulses from a 76-MHz optical parametric oscillator. The data show a rich collection of phenomena including bandgap renormalization, carrier-carrier scattering, carrier cooling and (Gamma) yields L intervalley scattering. An apparent carrier density dependence in the measured intervalley scattering time is attributed to plasma screening of the Coulomb enhanced continuum absorption.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gary Mak, Henry M. van Driel, "Femtosecond spectroscopy at the direct bandedge of germanium", Proc. SPIE 2142, Ultrafast Phenomena in Semiconductors, (6 May 1994); doi: 10.1117/12.175883; https://doi.org/10.1117/12.175883

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