title: Detectivity enhancement in THz electrooptical sampling.
abstract: We demonstrate and discuss a simple scheme that significantly enhances the detectivity of THz electro-optical sampling by introducing a sequence of Brewster windows that increases the ellipticity of the probe beam. By varying the window material or the number of Brewster windows, the enhancement factor can be adjusted; we demonstrate an enhancement factor of ≈20 with four ZnSe Brewster windows. The scheme is particularly useful when very small THz fields are to be measured in connection with low-repetition rate amplified Ti:S laser systems.
authors: Department of Chemistry, University of Zurich, Zurich, Switzerland.
authors: Saima
authors: S
authors: Ahmed
authors: Department of Chemistry, University of Zurich, Zurich, Switzerland.
authors: Janne
authors: J
authors: Savolainen
authors: Department of Chemistry, University of Zurich, Zurich, Switzerland.
authors: Peter
authors: P
authors: Hamm