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We demonstrate the generation of single-cycle 0.1-THz radiation in a lithium niobate crystal using optical rectification and obtain THz output energy of 65 μJ with 31.6 MV/m peak field. This amounts to an optical-to-THz energy conversion efficiency of 0.3% at 85 K, which is in agreement with theory.
We present coherent Raman spectroscopy of DMSO/water mixtures in the terahertz (THz) frequency region. In the measurements we use the spectral focusing technique with frequency chirped optical pulses, which enables us to measure both the stimulated Raman gain and loss signal in a wide THz frequency range from 0.1 to 25 THz. The observed coherent Raman spectra of [DMSO/water] mixtures show nonlinear...
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