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Second-Harmonic-generation studies of inclined thin films

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Abstract

The nonlinear surface susceptibility χ (2)S is generally referred to the system of Cartesian coordinates of thesample. However, since actual measurements take place with respect to thelaboratory system of coordinates, appropriate transformation of χ (2)S is necessary to deduce the underlying susceptibility-components. We demonstrate this by analyzing the second-harmonic signal generated by an inclined sample upon rotation around thes-axis of the laboratory system of coordinates. The sample consists of two Langmuir-Blodgett-type monolayers of rotational symmetry around the sample normal, the two layers being separated by a plane-parallel flat of 1 mm thickness. The occurrence of a “symmetry-forbidden”I SS -signal is discussed in detail.

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Stolle, R., Marowsky, G., Pinnow, M. et al. Second-Harmonic-generation studies of inclined thin films. Appl. Phys. B 58, 317–321 (1994). https://doi.org/10.1007/BF01082627

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