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Proceedings Paper

Multilayer X(2) films from porphyrin chromophores by LBK processing
Author(s): Geoffrey A. Lindsay; Randall R. Kolega; M. Joseph Roberts; Harry Tetsuo Uyeda; Michael J. Therien; Warren N. Herman
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Paper Abstract

Electrooptic films based on a new class of porphyrin chromophores with exceptionally large molecular first hyperpolarizabilities are begin developed. These chromophores feature donor and acceptor groups linked to the porphyrin macrocycle at the 5- and 15-meso positions through intervening ethynyl moieties. We report herein preliminary result that describe the ambient temperature assembly of ordered, electrooptic films using the Langmuir-Blodgett-Kuhn method. The facile formation of such films was mae possible by the preparation of amphiphilic chromophores containing hydrophobic aliphatic substituents to enhance the polar alignment at the air-water interface. Second harmonic generation and UV-Vis absorption were used to characterize the films as a function of the number of layers deposited. Polar films containing up to 10 layers were made by simple Y-type homolayer deposition, and up to six layers by the Y- type heterolayer method in which the porphyrin layers were interleaved with poly(t-butyl methacrylate). The polar order in these films relaxed exponentially. Ionic structures are recommended for improved stability.

Paper Details

Date Published: 11 October 1999
PDF: 9 pages
Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); doi: 10.1117/12.368288
Show Author Affiliations
Geoffrey A. Lindsay, Naval Air Warfare Ctr. (United States)
Randall R. Kolega, Naval Air Warfare Ctr. (United States)
M. Joseph Roberts, Naval Air Warfare Ctr. (United States)
Harry Tetsuo Uyeda, Univ. of Pennsylvania (United States)
Michael J. Therien, Univ. of Pennsylvania (United States)
Warren N. Herman, Naval Air Warfare Ctr. (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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