CARS difference spectroscopy. II—Determination of small frequency shifts and band width changes in binary mixtures

Weippert, A.; Kiefer, W.

doi:10.1002/jrs.1250231209

Cited by 7 publications

References 12 publications

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Raman Scattering, Fundamentals

Popp

Kiefer

2000

Encyclopedia of Analytical Chemistry

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An introduction of the fundamentals of linear and nonlinear Raman spectroscopy is given. The Raman effect is the result of inelastic light scattering. A small amount of the photon energy of the incident light wave is modulated by the molecular scattering system. An energy transfer occurs as a result of the coupling between the incident radiation and the quantized states of the scattering system. Depending on the coupling, the incident photons either gain or lose energy. The light, which has less energy than the incident laser light, is named Stokes–Raman scattering, and the radiation, which has more energy, is referred to as anti‐Stokes–Raman scattering. In the case of the coupling between strong laser fields and molecular vibrations the observation of nonlinear Raman effects such as hyper‐Raman scattering, stimulated Raman scattering (SRS), coherent anti‐Stokes–Raman spectroscopy, the Raman gain spectroscopy, etc., is possible. Apart from theoretical aspects of Raman spectroscopy an introduction into the instrumentation of linear and nonlinear Raman techniques is provided. For linear Raman spectroscopy two alternate approaches are described: dispersive Raman and Fourier transform Raman (FT‐Raman) spectroscopy. Special Raman techniques such as micro‐Raman spectroscopy and difference Raman spectroscopy are discussed. In addition, a review of the instrumentation of several nonlinear Raman methods which are based on the second‐order (χ (2) ) and the third‐order nonlinear susceptibility (χ (3) ) is given. These methods include coherent anti‐Stokes–Raman scattering (CARS), stimulated Raman gain spectroscopy (SRGS), inverse Raman scattering (IRS), photoacoustic Raman spectroscopy (PARS), and ionization‐detected stimulated Raman spectroscopy (IDSRS).

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Raman Scattering, Fundamentals

Popp

Kiefer

2000

Encyclopedia of Analytical Chemistry

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show abstract

References

1995

Infrared and Raman Spectroscopy

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CARS difference spectroscopy. I—theory for binary mixtures

Weippert

Kiefer

1992

J Raman Spectroscopy

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The theory for CARS difference spectroscopy is developed. This is an extension of linear Raman difference spectroscopy to non-linear methods. This technique can be applied to the study of frequency shifts and band width changes in the CARS spectra of liquid mixtures or solutions when fluorescence does not allow linear Raman difference spectroscopy to be used. However, because of their coherent properties CARS spectra show complex line shapes due to interference effects between adjacent lines, which prohibits the simple subtraction of CARS spectra from one another. To make use of this technique, the spectra must be simulated with the inclusion of interference terms. The necessary theoretical treatment is outlined and some numerical model calculations for the v2(A Raman modes in chloroform4euterochoroform mixtures of different concentrations are given. Special emphasis is put on illustrating the influence of the interference effects in the CARS spectra of these mixtures.

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CARS difference spectroscopy. II—Determination of small frequency shifts and band width changes in binary mixtures

Cited by 7 publications

References 12 publications

Raman Scattering, Fundamentals

Raman Scattering, Fundamentals

References

CARS difference spectroscopy. I—theory for binary mixtures

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