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Propagation effects in electro-optic sampling of terahertz pulses in GaAs
M Vossebürger1, M Brucherseifer, G C Cho
1Institut für Halbleitertechnik II, Rheinisch-Westfälische Technische Hochschule Aachen, Sommerfeldstrasse 24, D-52056 Aachen, Germany.
Applied Optics
|February 15, 2008
Abstract:
Freely propagating terahertz pulses are detected in the time domain by electro-optic sampling in bulk GaAs. We investigate the influence of dispersion of the near-infrared sampling pulse on the transients by varying the thickness of the GaAs crystal. Pronounced propagation effects are identified that originate from the frequency dependence of the phase-matching condition between the terahertz and the sampling pulse.
