Abstract
We present THz time-domain spectroscopy and imaging covering a wide frequency range up to 20 THz. Our approach uses highly efficient organic nonlinear optical crystals (DSTMS, OH1) and a compact femtosecond pump laser (1560 nm) with MHz repetition rate and ultrashort pulse width (<40 fs). By optimizing the optical geometry, we achieve high SNR (>80 dB at 4 THz, >70 dB at 10 THz). Our theoretical model agrees well with experiments. We validate our system by obtaining high-resolution THz spectra of water vapor and various solid substances. Additionally, we present THz imaging with sub-50 mu m spatial and sub-10 fs temporal resolution. Show more
Publication status
publishedExternal links
Book title
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVIIVolume
Pages / Article No.
Publisher
SPIEEvent
Subject
Terahertz generation; nonlinear optics; organic materials; wide THz bandwidth; THz spectroscopy; THz imagingMore
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ETH Bibliography
yes
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