An electro-optic (EO) dendrimer exhibits a higher χ(2) value that is suitable for femto-second laser pulse conversion for terahertz generation at room temperature. The pump-terahertz conversion via EO rectification offers an inherent power scalability that is not limited by emission saturation or by heat dissipation. A higher electro-optic coefficient was achieved by corona poling a chromophore doped dendrimer film. Measured refractive index shows significant systematic difference between poled and unpoled films that allows deducing a value of r33 ∼130 pm/V at 633 nm via the Pockels effect. Terahertz waves were generated by electro-optic rectification from this dendrimer; an average terahertz power of ∼60 µW was measured at a mode-locked pump power of 260 mW. It is thought that the generated waves (T-rays) can be used for time-domain terahertz spectroscopy.
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