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Proceedings Paper

Femtosecond hyper-Rayleigh scattering study of spatial orientational correlations between chromophores
Author(s): Koen J. Clays; Marvin Wu; Andre P. Persoons
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Paper Abstract

Since the introduction of hyper-Rayleigh scattering (HRS) as a measurement technique for the first hyperpolarizability (second-order polarizability) of molecules in solution, the importance of fluctuations in the orientational distribution was realized. For isotropic solutions, a combination of the spatial and temporal fluctuations causes the instantaneous and local deviation from macroscopic centrosymmetry, which allows the observation of a second-order HRS signal. Femtosecond HRS has been used to probe the spatial orientational distribution function of nonlinear optical chromophores. The fluctuations in this function cause an HRS signal that fluctuates as a function of position. The decay of the autocorrelation function of this fluctuating signal is characterized by a correlation length. The correlation length indicates the degree of spatial correlation between the chromophores in the solid state. The development of femtosecond HRS was instrumental for the study of orientational correlations.

Paper Details

Date Published: 5 October 1995
PDF: 9 pages
Proc. SPIE 2527, Nonlinear Optical Properties of Organic Materials VIII, (5 October 1995); doi: 10.1117/12.222791
Show Author Affiliations
Koen J. Clays, Univ. of Leuven (Belgium)
Marvin Wu, Univ. of Leuven (Belgium)
Andre P. Persoons, Univ. of Leuven (Belgium)

Published in SPIE Proceedings Vol. 2527:
Nonlinear Optical Properties of Organic Materials VIII
Gustaaf R. Moehlmann, Editor(s)

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