Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures
Hydrogen-bonded mixtures with varying concentration are a complicated networked system that demands a detection technique with both time and frequency resolutions. Hydrogen-bonded pyridine–water mixtures are studied by a time-frequency resolved coherent Raman spectroscopic technique. Femtosecond bro...
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De Gruyter
2021
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oai:doaj.org-article:f2aa6635353644238ea7febe39a7ac7a2021-12-05T14:11:01ZUltrafast dephasing in hydrogen-bonded pyridine–water mixtures2391-547110.1515/phys-2021-0027https://doaj.org/article/f2aa6635353644238ea7febe39a7ac7a2021-05-01T00:00:00Zhttps://doi.org/10.1515/phys-2021-0027https://doaj.org/toc/2391-5471Hydrogen-bonded mixtures with varying concentration are a complicated networked system that demands a detection technique with both time and frequency resolutions. Hydrogen-bonded pyridine–water mixtures are studied by a time-frequency resolved coherent Raman spectroscopic technique. Femtosecond broadband dual-pulse excitation and delayed picosecond probing provide sub-picosecond time resolution in the mixtures temporal evolution. For different pyridine concentrations in water, asymmetric blue versus red shifts (relative to pure pyridine spectral peaks) were observed by simultaneously recording both the coherent anti-Stokes and Stokes Raman spectra. Macroscopic coherence dephasing times for the perturbed pyridine ring modes were observed in ranges of 0.9–2.6 ps for both 18 and 10cm−110\hspace{0.33em}{{\rm{cm}}}^{-1} broad probe pulses. For high pyridine concentrations in water, an additional spectral broadening (or escalated dephasing) for a triangular ring vibrational mode was observed. This can be understood as a result of ultrafast collective emissions from coherently excited ensemble of pairs of pyridine molecules bound to water molecules.Ariunbold Gombojav O.Semon BryanNagpal SupriyaRostovtsev YuriDe Gruyterarticlecoherent anti-stokes raman scatteringcooperative phenomenonnon-linear opticsspectroscopyPhysicsQC1-999ENOpen Physics, Vol 19, Iss 1, Pp 234-240 (2021) |
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DOAJ |
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EN |
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coherent anti-stokes raman scattering cooperative phenomenon non-linear optics spectroscopy Physics QC1-999 |
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coherent anti-stokes raman scattering cooperative phenomenon non-linear optics spectroscopy Physics QC1-999 Ariunbold Gombojav O. Semon Bryan Nagpal Supriya Rostovtsev Yuri Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| description |
Hydrogen-bonded mixtures with varying concentration are a complicated networked system that demands a detection technique with both time and frequency resolutions. Hydrogen-bonded pyridine–water mixtures are studied by a time-frequency resolved coherent Raman spectroscopic technique. Femtosecond broadband dual-pulse excitation and delayed picosecond probing provide sub-picosecond time resolution in the mixtures temporal evolution. For different pyridine concentrations in water, asymmetric blue versus red shifts (relative to pure pyridine spectral peaks) were observed by simultaneously recording both the coherent anti-Stokes and Stokes Raman spectra. Macroscopic coherence dephasing times for the perturbed pyridine ring modes were observed in ranges of 0.9–2.6 ps for both 18 and 10cm−110\hspace{0.33em}{{\rm{cm}}}^{-1} broad probe pulses. For high pyridine concentrations in water, an additional spectral broadening (or escalated dephasing) for a triangular ring vibrational mode was observed. This can be understood as a result of ultrafast collective emissions from coherently excited ensemble of pairs of pyridine molecules bound to water molecules. |
| format |
article |
| author |
Ariunbold Gombojav O. Semon Bryan Nagpal Supriya Rostovtsev Yuri |
| author_facet |
Ariunbold Gombojav O. Semon Bryan Nagpal Supriya Rostovtsev Yuri |
| author_sort |
Ariunbold Gombojav O. |
| title |
Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| title_short |
Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| title_full |
Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| title_fullStr |
Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| title_full_unstemmed |
Ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| title_sort |
ultrafast dephasing in hydrogen-bonded pyridine–water mixtures |
| publisher |
De Gruyter |
| publishDate |
2021 |
| url |
https://doaj.org/article/f2aa6635353644238ea7febe39a7ac7a |
| work_keys_str_mv |
AT ariunboldgombojavo ultrafastdephasinginhydrogenbondedpyridinewatermixtures AT semonbryan ultrafastdephasinginhydrogenbondedpyridinewatermixtures AT nagpalsupriya ultrafastdephasinginhydrogenbondedpyridinewatermixtures AT rostovtsevyuri ultrafastdephasinginhydrogenbondedpyridinewatermixtures |
| _version_ |
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