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Issue 10, 2014
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Polarized 3D Raman and nanoscale near-field optical microscopy of optically inscribed surface relief gratings: chromophore orientation in azo-doped polymer films

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Abstract

We have used polarized confocal Raman microspectroscopy and scanning near-field optical microscopy with a resolution of 60 nm to characterize photoinscribed grating structures of azobenzene doped polymer films on a glass support. Polarized Raman microscopy allowed determining the reorientation of the chromophores as a function of the grating phase and penetration depth of the inscribing laser in three dimensions. We found periodic patterns, which are not restricted to the surface alone, but appear also well below the surface in the bulk of the material. Near-field optical microscopy with nanoscale resolution revealed lateral two-dimensional optical contrast, which is not observable by atomic force and Raman microscopy.

Graphical abstract: Polarized 3D Raman and nanoscale near-field optical microscopy of optically inscribed surface relief gratings: chromophore orientation in azo-doped polymer films

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Publication details

The article was received on 30 Jun 2013, accepted on 05 Dec 2013 and first published on 09 Dec 2013


Article type: Paper
DOI: 10.1039/C3SM51787J
Citation: Soft Matter, 2014,10, 1544-1554
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    Polarized 3D Raman and nanoscale near-field optical microscopy of optically inscribed surface relief gratings: chromophore orientation in azo-doped polymer films

    G. Di Florio, E. Bründermann, N. S. Yadavalli, S. Santer and M. Havenith, Soft Matter, 2014, 10, 1544
    DOI: 10.1039/C3SM51787J

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