title: Generation of narrowband, high-intensity, carrier-envelope phase-stable pulses tunable between 4 and 18  THz.
abstract: We report on the generation of high-energy (1.9 μJ) far-infrared pulses tunable between 4 and 18 THz frequency. Emphasis is placed on tunability and on minimizing the bandwidth of these pulses to less than 1 THz, as achieved by difference-frequency mixing of two linearly chirped near-infrared pulses in the organic nonlinear crystal DSTMS. As the two near-infrared pulses are derived from amplification of the same white light continuum, their carrier envelope phase fluctuations are mutually correlated, and hence the difference-frequency THz field exhibits absolute phase stability. This source opens up new possibilities for the control of condensed matter and chemical systems by selective excitation of low-energy modes in a frequency range that has, to date, been difficult to access.
authors.forename: B
authors.initials: B
authors.lastname: Liu
authors.forename: H
authors.initials: H
authors.lastname: Bromberger
authors.forename: A
authors.initials: A
authors.lastname: Cartella
authors.forename: T
authors.initials: T
authors.lastname: Gebert
authors.forename: M
authors.initials: M
authors.lastname: Först
authors.forename: A
authors.initials: A
authors.lastname: Cavalleri