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Proceedings Paper

Second harmonic generation studies of metal and nonmetal porphyrins at silica surfaces
Author(s): Lorenzo Echevarria; Vincent Piscitelli; Jimmy A. Castillo; C. Scott; Manuel Caetano
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Paper Abstract

Resonant molecular optical second harmonic generation (SHG) was obtained from(2, 3, 7, 8, 12, 13, 17, 18-Octaethyl- porphinato)M, with M equals none, vanadyl and Ni(II), adsorbed onto fused silica substrates. The polarization dependence of the SHG signals at 1064 nm allowed the determination of average molecular orientations. For the vanadium porphyrin the average angle between the long axis molecules and the surface normal was 38 degrees, while, for the Nickel porphyrin, and the non-metal porphyrin the angle was close to 0 degrees. These results can be understood in terms of the different symmetries of the molecules.

Paper Details

Date Published: 11 October 1999
PDF: 6 pages
Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); doi: 10.1117/12.368286
Show Author Affiliations
Lorenzo Echevarria, Univ. Central de Venezuela (Venezuela)
Vincent Piscitelli, Univ. Central de Venezuela (Venezuela)
Jimmy A. Castillo, Univ. Central de Venezuela (Venezuela)
C. Scott, Univ. Central de Venezuela (Venezuela)
Manuel Caetano, Univ. Central de Venezuela (Venezuela)


Published in SPIE Proceedings Vol. 3796:
Organic Nonlinear Optical Materials
Manfred Eich; Manfred Eich; Mark G. Kuzyk, Editor(s)

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