Abstract

Single-cycle terahertz (THz) transients in the frequency range 0.37THz with electric-field amplitudes of more than 400kVcm are generated by four-wave mixing of the fundamental and the second harmonic of 25fs pulses from a Ti:sapphire amplifier in ionized air. These transients are fully characterized by electro-optic sampling with ZnTe and GaP crystals. One can tune the center frequency of the THz transients by varying the length of the incident pulse. The electric-field amplitude increases linearly with the incident pulse energy.

© 2005 Optical Society of America

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