title: Generation of phase-locked and tunable continuous-wave radiation in the terahertz regime.
abstract: Broadly tunable phase-stable single-frequency terahertz radiation is generated with an optical heterodyne photomixer. The photomixer is excited by two near-infrared CW diode lasers that are phase locked to the stabilized optical frequency comb of a femtosecond titanium:sapphire laser. The terahertz radiation emitted by the photomixer is downconverted into RF frequencies with a waveguide harmonic mixer and measurement-limited linewidths at the Hertz level are demonstrated.
authors.affiliation: JILA, Department of Physics, University of Colorado and the National Institute of Standards and Technology, Boulder 80309-0440, USA. quraishi@colorado.edu
authors.forename: Qudsia
authors.initials: Q
authors.lastname: Quraishi
authors.forename: Martin
authors.initials: M
authors.lastname: Griebel
authors.forename: Thomas
authors.initials: T
authors.lastname: Kleine-Ostmann
authors.forename: Rudolf
authors.initials: R
authors.lastname: Bratschitsch