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Proceedings Paper

Concentration dependence of surface nonlinear susceptibility of vanadyl-porphyrin at silica surfaces
Author(s): Lorenzo Echevarria; Hector Gutierrez; Veronica Sosa; Manuel Caetano
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Paper Abstract

Resonant molecular optical second harmonic generation (SHG) has been obtained from [2, 3, 7, 8, 12, 13, 17, 18- Octaethyl-porphinato] vanadyl, (OEP)V=O, adsorbed on the hypotenuse face of a glass prism. Rotational intensity patterns are showed by plotting the second harmonic intensity as a function of the incident polarization angle of the fundamental wave, at a fixed angle of incidence. Evaluation of these patterns by Fourier analysis allowed the determination of the second order susceptibilities components of the adsorbed layers. Assuming a delta distribution function, the mean orientation angles from normal to the surface plane, were obtained for different solution concentrations. Our results indicate an abrupt change in the angle for two concentration ranges.

Paper Details

Date Published: 7 December 2001
PDF: 5 pages
Proc. SPIE 4461, Linear and Nonlinear Optics of Organic Materials, (7 December 2001); doi: 10.1117/12.449845
Show Author Affiliations
Lorenzo Echevarria, Univ. Central de Venezuela (Venezuela)
Hector Gutierrez, Univ. Central de Venezuela (Venezuela)
Veronica Sosa, Univ. Central de Venezuela (Venezuela)
Manuel Caetano, Univ. Central de Venezuela (Venezuela)

Published in SPIE Proceedings Vol. 4461:
Linear and Nonlinear Optics of Organic Materials
Manfred Eich; Mark G. Kuzyk, Editor(s)

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