title: Direct field-resolved detection of terahertz transients with amplitudes of megavolts per centimeter.
abstract: Phase-matched difference-frequency mixing in a thin GaSe crystal within the broad spectrum of 25-fs pulses from a Ti:sapphire oscillator multipass amplifier system permits the generation of few-cycle electric field transients, frequencies up to 30 THz, and amplitudes of more than 1 MV/cm. The field transients generated at a 1-kHz repetition rate are directly measured by electro-optic sampling by 12-f probe pulses from the 75-MHz repetition-rate Ti:sapphire oscillator in combination with a novel electronic gating technique.
authors.affiliation: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, 12489 Berlin, Germany. reimann@mbi-berlin.de
authors.forename: K
authors.initials: K
authors.lastname: Reimann
authors.forename: R P
authors.initials: RP
authors.lastname: Smith
authors.forename: A M
authors.initials: AM
authors.lastname: Weiner
authors.forename: T
authors.initials: T
authors.lastname: Elsaesser
authors.forename: M
authors.initials: M
authors.lastname: Woerner