Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2828709
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Terahertz waves, electromagnetic radiation in the spectral region commonly defined between 0.3 and 10 THz, allow innovative sensing and imaging techniques that can provide spectroscopic information unavailable at other wavelengths. However, simultaneously intense, broadband, and coherent spectroscopic measurement remains challenging. We report spectrometry using gases ionized by femtosecond pulses to generate and sense broadband terahertz pulses. Using a coherent heterodyne technique, the measurements span the terahertz gap with >= 10% of the maximum signal from 0.3 to 10 THz. This spectrometer, using a recycled optical probe beam and coherent detection, offers a high field strength and time-resolved measurement.
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