Tunable narrowband THz source (1–20 THz) based on organic crystals DSTMS and OH1

We demonstrate efficient generation of narrowband (<; 100 GHz) THz pulses in the nanosecond range by using difference frequency generation in organic electro-optic crystals DSTMS and OH1. The terahertz output is tunable in the range of 1-20 THz and can be used for THz imaging and spectroscopy.