THz spectroscopy with ultrahigh sensitivity

Summary form only given.Although THz radiation has been used successfully for several applications the signal-to-noise ratio is mostly restricted to 10/sup 4/ to 10/sup 6/ in intensity. Especially for thin films of material the absorption and time delay of a THz pulse are mostly too low to be detect...

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Bibliographic Details
Main Authors: Brucherseifer, M., Pellemans, H.P.M., Haring Bolivar, P., Kurz, H.
Format: Conference Proceeding
Language:English
Subjects:
Delay effects
Laser beams
Magnetic fields
Resists
Sampling methods
Spectroscopy
Online Access:Request full text
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Summary:Summary form only given.Although THz radiation has been used successfully for several applications the signal-to-noise ratio is mostly restricted to 10/sup 4/ to 10/sup 6/ in intensity. Especially for thin films of material the absorption and time delay of a THz pulse are mostly too low to be detected. We show a new method to enhance the sensitivity of THz spectroscopy to relative changes of 10/sup -10/ in intensity by shaking a sample through the focus of a THz beam and using lock-in detection on the shaking frequency.
DOI:10.1109/CLEO.2000.907380