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Enhanced Third Order Nonlinearity in Macrocyclic Compounds

Published online by Cambridge University Press:  25 February 2011

Masahiro Hosoda
Affiliation:
Unitika Ltd., Research and Development Center, Kozakura 21, Uji, Kyoto 611, Japan
Tatsuo Wada
Affiliation:
The Institute of Physical and Chemical Research (RIKEN), Frontier Research Program (FRP), Hirosawa 2–1, Wako, Saitama 351–01, Japan
Anthony F. Garito
Affiliation:
University of Pennsylvania, Department of Physics, Philadelphia, PA 19104
Hiroyuki Sasabe
Affiliation:
The Institute of Physical and Chemical Research (RIKEN), Frontier Research Program (FRP), Hirosawa 2–1, Wako, Saitama 351–01, Japan
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Abstract

The third-order nonlinear optical susceptibilities χ(3)1111(-3ω; ω, ω, ω) of macrocyclic compounds such as phthalocyanines and porphyrins are determined for the vacuum deposited and spin coated thin films by optical third-harmonic generation measurements at a wavelength of 1907 nm. The enhancements of the χ(3) values are discussed in terms of the central metal substitution, molecular stacking, extended ring size and number of χ-electrons. We firstly describe the results of extended porphyrin systems with 26 delocalized π-electrons.

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