Showing papers by "Wolfgang Kiefer published in 1977"
TL;DR: In this paper, the CARS spectra of N 2, O 2 and v 1 of C 2 H 2 have been measured with a pulsed dye laser system with high resolution.
37 citations
TL;DR: The complex resonance Raman spectra of molecular bromine have been analyzed quantitatively and a clear demonstration of interference in the Raman intensity from the B( 3 11 0 + u ) and 1 17 1u excited states has been found as mentioned in this paper.
36 citations
TL;DR: In this article, a real-time scan of the purely isotropic part of Raman scattered light (trace scattering) is presented, where the depolarization ratio can be automatically computed as a function of Ramaman shift.
Abstract: In a recent paper Kiefer and Topp have shown how the depolarization ratio can be scanned automatically as a function of Raman shift. By means of a rotating split polarization rotator which is positioned in the laser beam and of a gated, two-channel computing photon counting system the quantities I⊥, I∥, and ρ = I⊥/I∥ can be directly and simultaneously recorded. By combining this technique with the method of difference Raman spectroscopy one is also able to subtract the anisotropically scattered light (I⊥, ~ 3γ) from the I∥ spectrum which contains isotropically as well as anisotropically scattered Raman light (I∥ ~ 45α−2 + 4γ2). Although this technique was already suggested in Ref. 1, the present note shows (to our knowledge) the first example of a real time scan of the purely isotropic part of Raman scattered light (trace scattering).
10 citations
TL;DR: In this paper, the effect of the interference between electromagnetic waves scattered through the electronic polarizability and the electronic optical activity of the molecule can be studied through the difference of the scattered Raman intensity from right and left circularly polarized incident light.
Abstract: Recently, excitation of Raman spectra with circularly polarized light has become an important method for the study of vibrational optical activity. This effect which originates in the interference between electromagnetic waves scattered through the electronic polarizability and the electronic optical activity of the molecule can be studied through the difference of the scattered Raman intensity from right and left circularly polarized incident light.
3 citations
TL;DR: In this paper, a spectrometer for coherent anti-Stokes Raman-scattered signals was described and the results of an investigation of the v1 (1525 cm-1) band of β-carotene were reported.
Abstract: A description is given of a spectrometer for recording coherent anti-Stokes Raman-scattered signals. The results are reported of an investigation of the v1 (1525 cm–1) band of β-carotene, carried out using this spectrometer.
2 citations