title: Sub-Doppler tunable far-infrared spectroscopy.
abstract: The first experimental observations to our knowledge of sub-Doppler linewidths in a cell made using tunable far-infrared radiation are reported. A double-resonance scheme has been used, combining CO(2)-laser infrared radiation with tunable far-infrared radiation to observe a sub-Doppler line shape in an excited vibrational state of CH(3)OH.
authors.forename: M
authors.initials: M
authors.lastname: Inguscio
authors.forename: L R
authors.initials: LR
authors.lastname: Zink
authors.forename: K M
authors.initials: KM
authors.lastname: Evenson
authors.forename: D A
authors.initials: DA
authors.lastname: Jennings