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  • 1990-1994  (2)
  • Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Comparison of different phase conjugate and backscattering arrangements in non-linear Raman spectroscopy (1990)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 21 (1990), S. 835-839 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A theoretical and experimental comparison of coherent anti-Stokes Raman scattering (CARS) and Raman-induced phase conjugation (RIPC) techniques has been carried out. In most cases the RIPC techniques are much more sensitive than CARS to deviations from the phase-matching conditions, from which it follows that for RIPC much higher accuracy of the alignment and optical homogeneity are necessary. In practice, only one RIPC variant with nearly copropagating pump waves and contrapropagating Stokes waves is applicable to obtain complete spectra. A CARS reflection technique is discussed for the investigation of highly absorbing samples.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250211212
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrational dephasing times of bis(dimethylamino)heptamethine iodide determined by CARS using incoherent light (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 607-613 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Interferometric coherent anti-Stokes Raman scattering (ICARS) using incoherent laser light was used for time-resolved measurements of vibrational parameters of solutions of bis(dimethylamino)heptamethine iodide in the ground and the S1, state. The vibrations at 1124, 1195, 1285 and 1304 cm-1 have dephasing times in the range 0.3-1.1 ps. The shortest dephasing time is observed for the normal mode at 1195 cm-1 with a large amplitude for the N atoms. The coherence peak in the ICARS signal around zero delay is broadened due to coupling to the electronic transition. The same peak width of 80 fs is found using degenerate four-wave mixing.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250250722
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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