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Proceedings Paper

NLO studies of a novel phenothiazine self-assembled monolayer
Author(s): Joanna L. Casson; Wenxi Huang; Yongwoo Lee; Jean-Francois Bardeau; Malkiat S. Johal; Wang Rong; Alexander DeQuan Li; Basil I. Swanson; Duncan W. McBranch; Merritt Helvenston; Jeanne M. Robinson
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Paper Abstract

The nonlinear optical behavior of self-assembled monolayer films of a new NLO-active molecule, PBSP, is characterized by second harmonic generation (SHG). PBSP contains a heterocyclic sulfonate head group and a highly polarizable chromophore. The films are synthesized by a nucleophilic substitution reaction on both sides of a quartz substrate that has been treated with a coupling layer. The addition of the chromophoric layer is monitored by AFM, FTIR and UV- visible spectroscopy, and SHG. The FTIR spectrum of the first layer shows weak methylene resonances, while the spectrum with the addition of the second layer shows much stronger methylene resonances and an amine resonance. The characterization of the film by SHG was done by rotating the film and generating Maker fringes. The polarization dependence of the SHG signal was also determined. The SHG signal after the nucleophilic reaction was an order of magnitude greater than before the reaction. The magnitude of the dominant element of the nonlinear susceptibility and the average molecular orientation angle of the chromophore were determined by modeling the Maker fringes and the polarization dependence of the SHG signal.

Paper Details

Date Published: 11 October 1999
PDF: 9 pages
Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); doi: 10.1117/12.368280
Show Author Affiliations
Joanna L. Casson, Los Alamos National Lab. (United States)
Wenxi Huang, New Mexico Highlands Univ. (United States)
Yongwoo Lee, Los Alamos National Lab. (United States)
Jean-Francois Bardeau, Los Alamos National Lab. (United States)
Malkiat S. Johal, Los Alamos National Lab. (United States)
Wang Rong, Los Alamos National Lab. (United States)
Alexander DeQuan Li, Los Alamos National Lab. (United States)
Basil I. Swanson, Los Alamos National Lab. (United States)
Duncan W. McBranch, Los Alamos National Lab. (United States)
Merritt Helvenston, New Mexico Highlands Univ. (United States)
Jeanne M. Robinson, Los Alamos National Lab. (United States)


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

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