Dr. James J. Doyle Profile

Dr. James J. Doyle

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Proceedings Article | 8 September 2004 Paper

Polymer-phthalocyanine composite systems as solid state passive optical limiters

James Doyle, Sean O'Flaherty, Yu Chen, Tadgh Hegarty, Michael Hanack, Werner Blau

Proceedings Volume 5464, (2004) https://doi.org/10.1117/12.544005

KEYWORDS: Composites, Absorption, Optical limiting, Polymers, Solid state physics, Metals, Nonlinear optics, Polymer thin films, Indium, Systems modeling

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The use of lasers as the driving force of information processing for future photonic technologies is almost inevitable. As a direct consequence of this the protecting of targets from high intensity stray optical beams, the most important being the eye, via optical limiting (high suppression of high intensity optical beams whilst allowing high transmission of ambient light) is a task of immediate importance. This contribution will discuss the application of metallo-phthalocyanine compounds doped into organic polymers to produce composite films to act as passive solid-state optical limiters. A range of phthalocyanines with different metals such as zinc, indium and vanadium substituted into the central cavity doped into the comercially available polymer poly(methyl)-methacrylate, PMMA, is investigated. The nonlinear responses exhibited by the systems are modelled and fitted using a three level orbital model to quantify the nonlinear activity in an effort to elucidate certain molecular design rules for the optical limiting application of the solid-state polymer-phthalocyanine composite. In addition to this the nature and physical properties of the films that are processed are also discussed.

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