Time-resolved hyper-Rayleigh scattering: measuring first hyperpolarizabilities ß of fluorescent molecules

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Noordman, O.F.J. and Hulst, N.F. van (1996) Time-resolved hyper-Rayleigh scattering: measuring first hyperpolarizabilities ß of fluorescent molecules. Chemical Physics Letters, 253 (1-2). pp. 145-150. ISSN 0009-2614

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Abstract:Time-resolved hyper-Rayleigh scattering experiments using a femtosecond mode-locked Ti-sapphire laser are presented. The technique is capable of discriminating between hyper-Rayleigh scattered light and fluorescent emission induced by multiphoton absorption with a time resolution of 80 ps. Measurements o­n the non-fluorescent organic molecules crystal violet and calix- [4]arene demonstrate that the technique can measure first hyperpolarizabilities beta consistent with experiments using a Q-switched Nd:YAG laser. The first hyperpolarizability beta of a fluorescent molecule, which is often overestimated when using a nanosecond laser system, can be corrected for long-term fluorescence using the time-resolved technique as is demonstrated for the octupolar molecule 1,3,5-tris[(4- pyridyl)ethynyl]benzene.
Item Type:Article
Copyright:© 1996 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/24560
Official URL:http://dx.doi.org/10.1016/0009-2614(96)00218-7
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