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Proceedings Paper

Nonlinear optical properties of organic and polymeric thin film materials of potential for microgravity processing studies
Author(s): Hossin Ahmed Abdeldayem; Donald O. Frazier; Mark Steven Paley; Benjamin G. Penn; William K. Witherow; Curtis E. Banks; Angela Shields; Rosline Hicks; Paul R. Ashley
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Paper Abstract

In this paper, we will take a closer look at the state of the art of polydiacetylene, and metal-free phthalocyanine films, in view of the microgravity impact on their optical properties, their nonlinear optical properties and their potential advantages for integrated optics. These materials have many attractive features with regard to their use in integrated optical circuits and optical switching. Thin films of these materials processed in microgravity environment show enhanced optical quality and better molecular alignment than those processed in unit gravity. Our studies of these materials indicate that microgravity can play a major role in integrated optics technology. Polydiacetylene films are produced by UV irradiation of monomer solution through an optical window. This novel technique of forming polydiacetylene thin films has been modified for constructing sophisticated micro-structure integrated optical patterns using a pre-programmed UV-laser beam. Wave guiding through these thin films by the prism coupler technique has been demonstrated. The third order nonlinear parameters of these films have been evaluated. Metal-free phthalocyanine films of good optical quality are processed in our laboratories by vapor deposition technique. Initial studies on these films indicate that they have excellent chemical, laser, and environmental stability. They have large nonlinear optical parameters and show intrinsic optical bistability. This bistability is essential for optical logic gates and optical switching applications. Waveguiding and device making investigations of these materials are underway.

Paper Details

Date Published: 12 July 1996
PDF: 11 pages
Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); doi: 10.1117/12.244321
Show Author Affiliations
Hossin Ahmed Abdeldayem, Universities Space Research Association (United States)
Donald O. Frazier, NASA Marshall Space Flight Ctr. (United States)
Mark Steven Paley, Universities Space Research Association (United States)
Benjamin G. Penn, NASA Marshall Space Flight Ctr. (United States)
William K. Witherow, NASA Marshall Space Flight Ctr. (United States)
Curtis E. Banks, NASA Marshall Space Flight Ctr. (United States)
Angela Shields, NASA Marshall Space Flight Ctr. (United States)
Rosline Hicks, NASA Marshall Space Flight Ctr. (United States)
Paul R. Ashley, U.S. Army Missile Command (United States)

Published in SPIE Proceedings Vol. 2809:
Space Processing of Materials
Narayanan Ramachandran, Editor(s)

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