Table of Contents
Laser Chemistry
Volume 17, Issue 3, Pages 123-137

Near-Resonant Nonlinear Optical Properties of Pseudoisocyanine J-Aggregates in Langmuir-Blodgett Layers

1Fachhochschule Jena, Fachbereich Medizintechnik/Physikalische Technik, Tatzendpromenade lb, Jena D-07745, Germany
2Vilnius University, Laser Research Center, Sauletekio ave. 10., Vilnius LT-2054, Lithuania
3Max-Planck-Institut für biophysikalische Chemie, Am Faβberg, Göttingen D-37077, Germany

Received 17 December 1996

Copyright © 1997 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The nonlinear optical properties of pseudoisocyanine J-aggregates in Langmuir-Blodgett films have been investigated by means of degenerate four wave mixing (DFWM) process. The conversion efficiency of the DFWM signal and the estimated third order susceptibility were found to be comparable with those of pseudoisocyanine J-aggregates in solution under comparable resonance conditions. The intensity dependence of the converted (DFWM) signal is interpreted as resulting from different processes including saturation, exciton-exciton annihilation and secondary processes of dynamical disorder.