We present a 2D-Raman-terahertz (THz) setup with multichannel (single-shot) THz detection, utilizing two crossed echelons, in order to reduce the acquisition time of typical 2D-Raman-THz experiments from days to a few hours. This speed-up is obtained in combination with a high repetition rate (100 kHz) Yb-based femtosecond laser system and a correspondingly fast array detector. The wavelength of the Yb-laser (1030 nm) is advantageous, since it assures almost perfect phase matching in GaP for THz generation and detection and since the dispersion in the transmissive echelons is minimal. 2D-Raman-THz test measurements on liquid bromoform (CHBr3) are reported. An enhancement of a factor ∼5.8 in signal-to-noise ratio is obtained for single-shot detection when compared to conventional step-scanning measurements in the THz time domain, corresponding to a speed-up of acquisition time of ∼34.
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7 November 2021
Research Article|
November 03 2021
2D-Raman-THz spectroscopy with single-shot THz detection
Special Collection:
Time-resolved Vibrational Spectroscopy
Marta Duchi
;
Marta Duchi
Department of Chemistry, University of Zurich
, Winterthurerstr. 190, CH-8057 Zürich, Switzerland
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Saurabh Shukla;
Saurabh Shukla
Department of Chemistry, University of Zurich
, Winterthurerstr. 190, CH-8057 Zürich, Switzerland
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Andrey Shalit;
Andrey Shalit
Department of Chemistry, University of Zurich
, Winterthurerstr. 190, CH-8057 Zürich, Switzerland
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Peter Hamm
Peter Hamm
a)
Department of Chemistry, University of Zurich
, Winterthurerstr. 190, CH-8057 Zürich, Switzerland
a)Author to whom correspondence should be addressed: peter.hamm@chem.uzh.ch
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a)Author to whom correspondence should be addressed: peter.hamm@chem.uzh.ch
Note: This paper is part of the JCP Special Topic on Time-Resolved Vibrational Spectroscopy.
J. Chem. Phys. 155, 174201 (2021)
Article history
Received:
August 05 2021
Accepted:
October 04 2021
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A companion article has been published:
Probing intramolecular bonds just became much faster
Citation
Marta Duchi, Saurabh Shukla, Andrey Shalit, Peter Hamm; 2D-Raman-THz spectroscopy with single-shot THz detection. J. Chem. Phys. 7 November 2021; 155 (17): 174201. https://doi.org/10.1063/5.0065804
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