Issue 19, 2012

Comparison of scattering and reflection SFG: a question of phase-matching

Abstract

We present a comparison between sum frequency scattering (SFS) and reflection mode sum frequency generation (R-SFG). We have used scattering theory to describe both scattering experiments as well as reflection mode experiments. The interfacial vibrational spectrum of nanoscopic oil droplets dispersed in water was probed with SFS as well as with R-SFG. Spectra recorded in phase-matched R-SFG mode and spectra recorded with SFS from the same sample are different, which shows that different interfaces are measured. Scattering spectra at different scattering angles agree with nonlinear light scattering theory. We further present experiments with polymer films aimed at quantifying the comparative strength of R-SFG and SFS experiments.

Graphical abstract: Comparison of scattering and reflection SFG: a question of phase-matching

Article information

Article type
Paper
Submitted
02 Feb 2012
Accepted
20 Mar 2012
First published
20 Mar 2012

Phys. Chem. Chem. Phys., 2012,14, 6826-6832

Comparison of scattering and reflection SFG: a question of phase-matching

H. B. de Aguiar, R. Scheu, K. C. Jena, A. G. F. de Beer and S. Roke, Phys. Chem. Chem. Phys., 2012, 14, 6826 DOI: 10.1039/C2CP40324B

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