Spectrally resolved four-wave mixing experiments on bulk GaAs with 14-fs pulses

Journal Article · Wed May 01 00:00:00 EDT 1996 · Journal of the Optical Society of America, Part B: Optical Physics

DOI:https://doi.org/10.1364/JOSAB.13.000977· OSTI ID:286555

Wehner, M U; Steinbach, D; Wegener, M ^[1]; Marschner, T; Stolz, W ^[2]

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1. Experimentelle Physik II, Universitaet Dortmund, Otto-Hahn-Strasse 4, D-44227 Dortmund (Germany)
2. Wissenschaftliches Zentrum fuer Materialwissenschaften und Fachbereich Physik, Philipps-Universitaet Marburg, Hans-Meerwein-Strasse, D-35032 Marburg (Germany)

We investigate the coherent dynamics at the band edge of GaAs at low temperatures for carrier densities ranging from 4.3{times}10{sup 14} cm{sup {minus}3} to 4.4{times}10{sup 17} cm{sup {minus}3} by means of spectrally resolved transient four-wave mixing with 14-fs pulses. At large nonequilibrium carrier densities we observe oscillations with an energy-dependent oscillation period related to interference among continuum states. The experimental findings are compared with a simple model. This comparison delivers a weak energy dependence of dephasing in the initial buildup phase of screening. {copyright} {ital 1996 Optical Society of America.}

• OSTI ID: 286555
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics, Vol. 13, Issue 5; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GALLIUM ARSENIDES
MAGNETO-OPTICAL EFFECTS
ABSORPTION SPECTRA
FREQUENCY MIXING
EXCITONS