Abstract
Up to now characterization of third order susceptibilities x (3)(w 4,w 3,w 2,w 1) of poly conjugated materials has been mainly performed by third harmonic x (3)(-3w,w,w,w) and degenerated four wave mixing x (3)(-w,w,w,-w) experiments [1,2]. In the more general case of w 4≠w 3=w 2≠w 1 a complete set of values and phases of x (3)(-w A,w P,w P,-w S) as well as its dispersion can be obtained by Coherent Anti Stokes Raman Scattering (CARS) [3,4]. Tuning the frequency difference of two lasers w P, w S to a Raman active mode w R results in an enhanced signal I(w A) ~ |x (3)|2 at w A = 2w P - w S which renders information on vibrational frequencies and intensities as in spontaneous Raman spectroscopy.
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© 1992 Springer-Verlag Berlin Heidelberg
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Werncke, W., Pfeiffer, M., Lau, A., Hasche, T. (1992). Quantitative Determination of the X (3)-Dispersion of Conjugated Polymers by Resonance CARS Line Shape Analysis. In: Kuzmany, H., Mehring, M., Roth, S. (eds) Electronic Properties of Polymers. Springer Series in Solid-State Sciences, vol 107. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84705-9_39
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DOI: https://doi.org/10.1007/978-3-642-84705-9_39
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