Far infrared CW difference-frequency generation using vertically integrated and planar low temperature grown GaAs photomixers : application to H2S rotational spectrum up to 3 THz - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2004

Far infrared CW difference-frequency generation using vertically integrated and planar low temperature grown GaAs photomixers : application to H2S rotational spectrum up to 3 THz

Gaël Mouret
S. Matton
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Robin Bocquet
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Emilien Peytavit
D. Lippens
  • Fonction : Auteur

Résumé

The generation of continuous coherent THz radiation by mixing two cw Ti:Sa laser beams with a well-controlled frequency separation for a new scheme of vertically integrated low temperature grown GaAs (LTG-GaAs) spiral photomixer is reported. For this new photomixer device used in THz emission, the LTG-GaAs active layer is sandwiched between the two parallel metal plates of a high-speed photodetector loaded by a broadband spiral antenna. We have exploited the advantage of a higher delivered power in the low part of the spectrum (<2000 GHz), while a low RC time constant planar interdigitated detector was used at the upper frequency. The performances of the spectroscopic setup in terms of spectral resolution (5 MHz), tunability and frequency capability are assessed by measurements of the pure rotational spectra of hydrogen sulfide (H2S) up to 3000 GHz.
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Dates et versions

hal-00133961 , version 1 (28-02-2007)

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  • HAL Id : hal-00133961 , version 1

Citer

Gaël Mouret, S. Matton, Robin Bocquet, Francis Hindle, Emilien Peytavit, et al.. Far infrared CW difference-frequency generation using vertically integrated and planar low temperature grown GaAs photomixers : application to H2S rotational spectrum up to 3 THz. Applied Physics B - Laser and Optics, 2004, 79 (6), pp.725-729. ⟨hal-00133961⟩
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