We developed a novel scheme for intense terahertz pulse generation by two-color driven ionization of gasses that allows for MV/cm level peak-fields. The nonlinear mixing between such high-field terahertz pulse and an optical pulse results in an electric-field-induced second harmonic generation, both in gasses and in condensed media. We report on our recent investigations on this phenomenon that allows e.g. for the terahertz pulses three-dimensional mapping.

© 2012 OSA

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