Second harmonic generation studies of metal and nonmetal porphyrins at silica surfaces

Lorenzo Echevarria; Vincent Piscitelli; Jimmy A. Castillo; C. Scott; Manuel Caetano

doi:10.1117/12.368286

11 October 1999 Second harmonic generation studies of metal and nonmetal porphyrins at silica surfaces

Lorenzo Echevarria, Vincent Piscitelli, Jimmy A. Castillo, C. Scott, Manuel Caetano

Proceedings Volume 3796, Organic Nonlinear Optical Materials; (1999) https://doi.org/10.1117/12.368286
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Lorenzo Echevarria, Vincent Piscitelli, Jimmy A. Castillo, C. Scott, and Manuel Caetano "Second harmonic generation studies of metal and nonmetal porphyrins at silica surfaces", Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); https://doi.org/10.1117/12.368286

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