Europhysics Letters (EPL) · 2014 · 46 citations · 17 references
EngineeringMaterials SciencePhysicsOpticsOptoelectronicsPhotonicsNonlinear OpticsOrganic SemiconductorsPhotonic CrystalsTerahertz PhotonicsTerahertz SpectroscopyUltrafast OpticsDifference-frequency GenerationEnergy Conversion EfficiencyOptical Parametric OscillationOptical Parametric OscillatorsPower OutputTerahertz GenerationTerahertz SourcesWavelength Tuning
Widely tunable and monochromatic terahertz (THz) difference frequency generation with organic crystal DSTMS was investigated experimentally. A double-pass KTiOPO4 optical parametric oscillator, pumped by a frequency-doubled Nd:YAG laser, was employed as the source of dual wavelength. The THz tuning spectrum covered a range of 0.88−19.27 THz. The dependence of the THz output on the crystal thickness and pump wavelength was studied. The results were well explained based on theoretical calculations. With a pump energy of 2.47 mJ, the output energy reached 85.3 nJ/pulse at 3.80 THz, which corresponded to a peak power of 17.9 W and photon conversion efficiency of .
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