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Nonlinear and bistable properties of doped PMMA lightguides

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Abstract

Polymer lightguides of PMMA doped with the azo dyes methyl-red and N, N-dihexyl-4-amino-4'-nitro-azobenzene (DHANA) are investigated with respect to their opto-optical properties. The trans-cis photoisomerisation of the dyes leads to reversible polarization-dependent optically induced refractive index changes. The index changes are anisotropic. Birefringence is measured using index matched lightguides. The changes with respect to each polarization are determined by leaky mode spectroscopy and by using a half-integrated interferometer. These changes are intensity dependent and, with a suitable geometry, bistability at low intensities (3 mW/mm3) can be obtained.

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Lückemeyer, T., Franke, H. Nonlinear and bistable properties of doped PMMA lightguides. Appl. Phys. A 55, 41–48 (1992). https://doi.org/10.1007/BF00324600

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  • DOI: https://doi.org/10.1007/BF00324600

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