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Proceedings Paper

Performance improvements for switchable H-PDLC gratings using morphological studies
Author(s): Adam K. Fontecchio; Gregory P. Crawford; Charles C. He; David A. Content
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Paper Abstract

We have used atomic force microscopy (AFM) tapping techniques to study the droplet cavity morphology of a Holographically-formed Polymer Dispersed Liquid Crystal (H- PDLC). The samples were created using a Coherent Verdi laser at 532 nm to holographically form a transmission grating structure within the liquid crystal / polymer composite. The gratings were removed from their glass substrates and the liquid crystal removed, allowing us to image the inside of the droplet cavities. We found that the surface structure is rough, and that the structure varies depending on the polymer used in the material set. One result is a cavity that has a dimpled morphology. We report our investigations of the material sets, which include AFM images, image analysis of the structures, and the potential implications of such structures on liquid crystal anchoring within the droplet cavities.

Paper Details

Date Published: 13 November 2001
PDF: 10 pages
Proc. SPIE 4458, Solar and Switching Materials, (13 November 2001); doi: 10.1117/12.448253
Show Author Affiliations
Adam K. Fontecchio, Brown Univ. (United States)
Gregory P. Crawford, Brown Univ. (United States)
Charles C. He, NASA Goddard Space Flight Ctr. (United States)
David A. Content, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 4458:
Solar and Switching Materials
Carl M. Lampert; Carl M. Lampert; Claes-Goran Granqvist; Claes-Goeran Granqvist; Keith L. Lewis; Keith L. Lewis, Editor(s)

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