Femtosecond hyper-Rayleigh scattering study of spatial orientational correlations between chromophores

Koen J. Clays; Marvin Wu; Andre P. Persoons

doi:10.1117/12.222791

5 October 1995 Femtosecond hyper-Rayleigh scattering study of spatial orientational correlations between chromophores

Koen J. Clays, Marvin Wu, Andre P. Persoons

Proceedings Volume 2527, Nonlinear Optical Properties of Organic Materials VIII; (1995) https://doi.org/10.1117/12.222791
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Koen J. Clays, Marvin Wu, and Andre P. Persoons "Femtosecond hyper-Rayleigh scattering study of spatial orientational correlations between chromophores", Proc. SPIE 2527, Nonlinear Optical Properties of Organic Materials VIII, (5 October 1995); https://doi.org/10.1117/12.222791

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