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2D THz-THz-Raman Photon-Echo Spectroscopy of Molecular Vibrations in Liquid Bromoform.
- Source :
-
The journal of physical chemistry letters [J Phys Chem Lett] 2017 Sep 21; Vol. 8 (18), pp. 4640-4644. Date of Electronic Publication: 2017 Sep 13. - Publication Year :
- 2017
-
Abstract
- Fundamental properties of molecular liquids are governed by long-range interactions that most prominently manifest at terahertz (THz) frequencies. Here we report the detection of nonlinear THz photon-echo (rephasing) signals in liquid bromoform using THz-THz-Raman spectroscopy. Together, the many observed signatures span frequencies from 0.5 to 8.5 THz and result from couplings between thermally populated ladders of vibrational states. The strongest peaks in the spectrum are found to be multiquantum dipole and 1-quantum polarizability transitions and may arise from nonlinearities in the intramolecular dipole moment surface driven by intermolecular interactions.
Details
- Language :
- English
- ISSN :
- 1948-7185
- Volume :
- 8
- Issue :
- 18
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry letters
- Publication Type :
- Academic Journal
- Accession number :
- 28876957
- Full Text :
- https://doi.org/10.1021/acs.jpclett.7b02106