title: Generation and characterization of terahertz pulse trains from biased, large-aperture photoconductors.
abstract: The saturation properties of terahertz emission from biased, large-aperture photoconductors excited by trains of amplified femtosecond optical pulses are presented. A direct comparison is made of the multiple-pulse saturation properties of terahertz emission from semi-insulating GaAs and low-temperature-grown GaAs emitters with different carrier lifetimes. When the carrier lifetime is less than or comparable with the interpulse spacing, a significant enhancement of the narrow-band terahertz output is observed. The enhancement is not observed for emitters with long carrier lifetimes, consistent with the results of a previously derived saturation theory [Opt. Lett. 18, 1340 (1993)].
authors: C W
authors: CW
authors: Siders
authors: J L
authors: JL
authors: Siders
authors: A J
authors: AJ
authors: Taylor
authors: S G
authors: SG
authors: Park
authors: M R
authors: MR
authors: Melloch
authors: A M
authors: AM
authors: Weiner