title: All-semiconductor room-temperature terahertz time domain spectrometer.
abstract: We report what we believe to be the first demonstration of an all-semiconductor room-temperature terahertz time domain spectrometer. An optical Stark mode-locked vertical-external-cavity surface-emitting laser with 480 fs pulses at 1044 nm was used to illuminate low-temperature-grown photoconductive antennae with 5 mum-gap bow-tie-shaped electrodes. The coherently detected spectrum has a bandwidth close to 1 THz, in which water absorption lines at 0.555 and 0.751 THz can be resolved.
authors.affiliation: School of Physics and Astronomy, University of Southampton, Southampton, UK.
authors.forename: Zakaria
authors.initials: Z
authors.lastname: Mihoubi
authors.forename: Keith G
authors.initials: KG
authors.lastname: Wilcox
authors.forename: Stephen
authors.initials: S
authors.lastname: Elsmere
authors.forename: Adrian
authors.initials: A
authors.lastname: Quarterman
authors.forename: Rakchanok
authors.initials: R
authors.lastname: Rungsawang
authors.forename: Ian
authors.initials: I
authors.lastname: Farrer
authors.forename: Harvey E
authors.initials: HE
authors.lastname: Beere
authors.forename: David A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: Anne
authors.initials: A
authors.lastname: Tropper
authors.forename: Vasileios
authors.initials: V
authors.lastname: Apostolopoulos