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Temporally two‐dimensional Raman spectroscopy of liquids by six‐wave mixing with ultra‐short pulses
Author(s) -
Tominaga Keisuke,
Keogh Gary P.,
Naitoh Yukito,
Yoshihara Keitaro
Publication year - 1995
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250260704
Subject(s) - dephasing , raman spectroscopy , wavenumber , mixing (physics) , curse of dimensionality , four wave mixing , homogeneous , molecular physics , raman scattering , spectroscopy , optics , physics , chemistry , condensed matter physics , nonlinear optics , statistical physics , quantum mechanics , laser , machine learning , computer science
A temporally two‐dimensional Raman spectroscopic method was developed to observe the fifth‐order optical response of liquids. Taking advantage of temporal two‐dimensionality, this technique can unambiguously distinguish homogeneous and inhomogeneous contributions to the dephasing of low‐wavenumber vibrational modes. The measurement of the fifth‐order optical response of liquid CS 2 was conducted by ultra‐fast non‐resonant six‐wave mixing using five different pulses. The experimental results are reproduced well in terms of one overdamped mode in the homogeneous limit and one underdamped mode with the width of the inhomogeneity less than 2.5 ps −1 .