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. © 2014 AIP Publishing LLC.
CITATION STYLE
Ahmed, S., Savolainen, J., Hamm, P., & Zhu, P. (2014). Detectivity enhancement in THz electrooptical sampling. Review of Scientific Instruments, 85(1). https://doi.org/10.1063/1.4862657
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