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Proceedings Paper

Relaxation phenomena in optically activated azo-materials
Author(s): Kai Prasuhn; Ansgar Draude; Hilmar Franke; Roger A. Lessard
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Paper Abstract

The photo-isomerisation of azo-compounds is used to record reversible holographic volume phase gratings in films of guest-host polymers. In situ recording of the diffraction efficiency has been performed for different azo-dyes in the non-polar Poly-methylmethacrylate (PMMA) and the polar Poly-α-methyl-styrene (PαMS) as a matrix. Within an exposure energy of 100 mJ/cm2 a pronounced maximum is observed for s-polarised light. With the light pattern still on this is then reduced to a lower level. In case of the polar matrix, this process can be identified as an interaction of the dye molecules with the polymer matrix.

Paper Details

Date Published: 9 December 2004
PDF: 7 pages
Proc. SPIE 5578, Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education, (9 December 2004); doi: 10.1117/12.562553
Show Author Affiliations
Kai Prasuhn, Univ. Duisburg-Essen (Germany)
Ansgar Draude, Univ. Duisburg-Essen (Germany)
Hilmar Franke, Univ. Duisburg-Essen (Germany)
Roger A. Lessard, COPL, Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 5578:
Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education

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