Two beam surface fluctuation specular reflection spectroscopy

Abstract : In surface fluctuation specular reflection spectroscopy (SFSRS) deflections of a specularly reflected laser beam are used to characterize thermally excited surface waves. Here we report on a new two beam version of SFSRS in which the deflections of two reflected laser beams from separate locations on a surface are correlated. We demonstrate that this new two beam SFSRS technique can be used to determine directly the power spectrum of height fluctuation of thermally excited surface waves over a large range of both frequencies and wavevectors. In addition, we show that the technique is well suited for materials ranging from simple liquids to complex liquids and soft solids, including turbid materials
Keywords : LIGHT-SCATTERING
Type de document :
Article dans une revue
Review of Scientific Instruments, American Institute of Physics, 2012, 83 (1), pp.013111 〈10.1063/1.3678317〉
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http://hal.upmc.fr/hal-01576632
Contributeur : Bruno Publis_simm <>
Soumis le : mercredi 23 août 2017 - 16:03:31
Dernière modification le : jeudi 11 janvier 2018 - 06:23:18

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Allan Raudsepp, Christian Frétigny, François Lequeux, Laurence Talini. Two beam surface fluctuation specular reflection spectroscopy. Review of Scientific Instruments, American Institute of Physics, 2012, 83 (1), pp.013111 〈10.1063/1.3678317〉. 〈hal-01576632〉

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