Acoustic effects on nonlinear optical processes

Conference paper (2016)

Authors

S. Deckers Katholieke Universiteit Leuven
Nick Van Steerteghem Katholieke Universiteit Leuven
Christ Glorieux Katholieke Universiteit Leuven
T. Verbiest Katholieke Universiteit Leuven
Copyright: © 2016 S. Deckers, Nick Van Steerteghem, Christ Glorieux, Thierry Verbiest, M.A. van der Veen
DOI
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https://doi.org/10.1117/12.2236958
Ultrasound Nonlinear optics Second-harmonic generation Hyper-Rayleigh scattering
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Published Date

2016

Language

English

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Abstract

We studied the effects of two types of ultrasonic waves, shear waves and longitudinal waves, using two nonlinear optical techniques, second-harmonic generation and hyper-Rayleigh scattering. Since shear waves hardly propagate in liquids, their influence on molecules at the interface between a surface and a liquid was studied using second-harmonic generation. Longitudinal waves propagate easily in solution, thus we used hyper-Rayleigh scattering to probe the ultrasonic effects on chromophores in solution. While we did not find shear waves to alter the second-harmonic generation from chromophores at the liquid/surface interface, the longitudinal waves caused effects comparable to our earlier observations. Longitudinal ultrasound caused a strong intensity modulation of the nonlinear optical signal according to a wave-pattern.

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