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Applied Optics

Applied Optics


  • Vol. 23, Iss. 16 — Aug. 15, 1984
  • pp: 2729–2733

Optical recording of refractive-index patterns in doped poly-(methyl methacrylate) films

Hilmar Franke  »View Author Affiliations

Applied Optics, Vol. 23, Issue 16, pp. 2729-2733 (1984)

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Thin films (3–6 μm) of poly-(methyl methacrylate) and benzildimethylketal were deposited from solutions in methyl methacrylate or styrene. The formation of refractive-index changes (Δn) by illumination with 366-nm light was studied over a large concentration range of ketal. For low concentrations benzildimethylketal acts mainly as a photoinitiator inducing Δn patterns via polymerization of the residual monomer. In the region of higher ketal contents the Δn formation is caused presumably by a photochemical reaction of benzildimethylketal. After thermal development and fixing, refractive-index changes up to 5 × 10−2 could be obtained.

© 1984 Optical Society of America

Original Manuscript: December 27, 1983
Published: August 15, 1984

Hilmar Franke, "Optical recording of refractive-index patterns in doped poly-(methyl methacrylate) films," Appl. Opt. 23, 2729-2733 (1984)

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